WO2024244952A1 - 电动工具 - Google Patents

电动工具 Download PDF

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Publication number
WO2024244952A1
WO2024244952A1 PCT/CN2024/092804 CN2024092804W WO2024244952A1 WO 2024244952 A1 WO2024244952 A1 WO 2024244952A1 CN 2024092804 W CN2024092804 W CN 2024092804W WO 2024244952 A1 WO2024244952 A1 WO 2024244952A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
controller
electric tool
power supply
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2024/092804
Other languages
English (en)
French (fr)
Inventor
郑述涛
李双
徐天啸
闵月梅
段俊雅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Chervon Industry Co Ltd
Original Assignee
Nanjing Chervon Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202310650856.2A external-priority patent/CN119057739A/zh
Priority claimed from CN202310827744.XA external-priority patent/CN119260675A/zh
Application filed by Nanjing Chervon Industry Co Ltd filed Critical Nanjing Chervon Industry Co Ltd
Priority to EP24814153.3A priority Critical patent/EP4604382A4/en
Priority to AU2024278868A priority patent/AU2024278868A1/en
Publication of WO2024244952A1 publication Critical patent/WO2024244952A1/zh
Priority to US19/206,375 priority patent/US20250269510A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/20—Arrangements for starting

Definitions

  • the present application specifically relates to an electric tool.
  • the free end of the output shaft of the power tool is generally equipped with functional parts such as drill bits and saw blades, and is provided with operating parts that can be operated by the user to switch the tool's on and off state.
  • the motor in the tool will be driven to operate so that the functional parts can perform operations such as tightening and cutting.
  • the motor in the tool will be controlled to stop, and the functional parts will also stop working.
  • the user may still need to use the lighting, display and other functions of the power tool.
  • One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide an electric tool.
  • An electric tool comprises: a motor; a power supply management device, comprising a power supply and configured to at least supply power to the motor; a driving device, configured to drive the motor to operate so as to realize the main function of the electric tool; an operating device, configured to be operated by a user to enable one or more functions of the electric tool, and output a function signal corresponding to the function enabled by the user to the power supply management device; the electric tool has a main function and at least one auxiliary function, and the function signal comprises a main function signal corresponding to the main function and an auxiliary function signal corresponding to each auxiliary function; wherein the power supply management device is further configured to output a first enable signal when any function signal is received, and output a third enable signal to the driving device when the main function signal is received; the electric tool also comprises: a first controller, connected to the power supply management device and configured to output a first drive signal to the driving device when at least the first enable signal is received; wherein the driving device is further configured to drive the motor to operate when the third enable signal and the first
  • the operating device is also configured to output a main function signal to the first controller when the user enables the main function; the first controller, which is also connected to the operating device, is also configured to output a first drive signal to the drive device when it receives the first enable signal and the main function signal.
  • the driving device includes a driving circuit and a driving signal generating circuit; the first controller is also configured to output a first driving signal to the driving circuit and a second driving signal to the driving signal generating circuit when at least a first enabling signal is received; the driving signal generating circuit is configured to output a second driving signal after a voltage boost process to the driving circuit when a third enabling signal and a second driving signal are received; the driving circuit is configured to drive the motor to operate when the first driving signal and the second driving signal are received.
  • the driving device includes a driving circuit and a driving integrated chip; the first controller is also configured to output a first driving signal to the driving integrated chip when at least a first enable signal is received; the driving integrated chip is configured to output a processed first driving signal to the driving circuit when a third enable signal and the first driving signal are received; the driving circuit is configured to drive the motor to operate when the first driving signal is received.
  • the power tool also includes: an auxiliary device, configured to realize the auxiliary functions of the power tool; a second controller, connected to the operating device and to the power supply management device; the operating device is also configured to output a function signal corresponding to the function enabled by the user to the second controller; the power supply management device is also configured to output a second enable signal to the second controller when any function signal is received; the second controller is configured to control the operation of the corresponding auxiliary device to realize the corresponding auxiliary function when the second enable signal is received and an auxiliary function signal corresponding to any auxiliary function is received.
  • the auxiliary function includes an interface display function
  • the auxiliary device includes an interface display device corresponding to the interface display function
  • the second controller is also configured to light up the interface display device and turn off the interface display device after a first preset time period when it receives a second enable signal and an auxiliary function signal corresponding to the interface display function.
  • the auxiliary function includes a power display function
  • the auxiliary device includes a power display device corresponding to the power display function
  • the second controller is also configured to light up the power display device and turn off the power display device after a second preset time when it receives a second enable signal and an auxiliary function signal corresponding to the power display function.
  • the operating device is also configured to be operated by a user to turn off one or more functions of the power tool, and interrupt the output of a function signal corresponding to the function turned off by the user to the second controller and the power supply management device.
  • the second controller is further configured to output a first maintenance signal to the power supply management device and interrupt the transmission of the first maintenance signal after a third preset time when the main function signal is lost;
  • the power supply management device is further configured to interrupt the transmission of the first maintenance signal to the power supply management device when the main function signal is lost and the first maintenance signal is lost.
  • the driving device outputs a third enabling signal.
  • the second controller is also configured to output a second maintenance signal to the power supply management device and interrupt the transmission of the second maintenance signal after a fourth preset time period when all functional signals are lost; the fourth preset time period is greater than or equal to the third preset time period; the power supply management device is also configured to interrupt the output of the first enable signal to the first controller when all functional signals are lost and the second maintenance signal is lost.
  • the second controller is also configured to output a third maintenance signal to the power supply management device and interrupt the transmission of the third maintenance signal after a fifth preset time period when all functional signals are lost; the fifth preset time period is greater than or equal to the fourth preset time period; the power supply management device is also configured to interrupt the output of the second enable signal to the second controller when all functional signals are lost and the third maintenance signal is lost.
  • a bench tool comprises: a workbench having at least one work plane for placing a workpiece; a cutting assembly acting on the workpiece; a motor operating to drive the cutting assembly to realize the main function of the bench tool; a power supply management device comprising a power supply and configured to at least supply power to the motor; a driving device configured to drive the motor to operate to realize the main function of the bench tool; an operating device configured to be operated by a user to enable one or more functions of the power tool, and output a function signal corresponding to the function enabled by the user to the power supply management device; the bench tool has a main function and at least one auxiliary function, and the function signal comprises a main function signal corresponding to the main function and an auxiliary function signal corresponding to each auxiliary function; wherein the power supply management device is further configured to output a first enable signal when any function signal is received, and output a third enable signal to the driving device when the main function signal is received; the bench tool further comprises: a first controller connected to the power supply management device and configured to output a first drive
  • An electric tool comprises: a motor; a power supply management device, comprising a power supply and configured to at least supply power to the motor; a driving device, configured to drive the motor to operate so as to realize the main function of the electric tool; an operating device, configured to be operated by a user to enable the main function, and output a main function signal corresponding to the main function to the power supply management device; wherein the power supply management device is further configured to output a first enable signal upon receiving the main function signal, and output a third enable signal to the driving device; the electric tool also comprises: a first controller, connected to the power supply management device and configured to output a first drive signal to the driving device upon receiving at least the first enable signal; wherein the driving device is further configured to drive the motor to operate upon receiving the third enable signal and the first drive signal.
  • a control method for an electric tool comprising: when a user enables one or more functions of the electric tool, an operating device outputs a function signal corresponding to the function enabled by the user to a power supply management device; when the power supply management device receives any function signal, the operating device outputs a first enable signal to a first controller, and when receiving a main function signal corresponding to a main function, the operating device outputs a third enable signal to a driving device; when the first controller receives at least the first enable signal, the operating device outputs a first drive signal to the driving device; and when the power supply management device receives at least the first enable signal, the operating device outputs a first enable signal to the driving device.
  • the drive motor operates to realize the main function.
  • An electric tool comprises: a motor; a power supply management device, comprising a power supply and configured to supply power to at least the motor; a driving device, configured to drive the motor to operate; an operating device, configured to be operated by a user to switch the on/off state of the electric tool and output a corresponding on signal or off signal; wherein the electric tool further comprises: a first controller, connected to the operating device and the driving device, and configured to output a driving signal to the driving device upon receiving a turning-on signal; a second controller, connected to the operating device and the driving device, and configured to output a driving enable signal to the driving device upon receiving a turning-on signal; and the driving device is further configured to drive the motor to operate upon receiving a driving signal and a driving enable signal.
  • the first controller is further configured to stop outputting the driving signal to the driving device upon receiving a shutdown signal.
  • the power management device is connected to the first controller, and the power management device is further configured to output a first enable signal to the first controller when receiving a start signal.
  • the first controller is also configured to output a first power-off signal to the power supply management device after waiting for a sixth preset time period when receiving a shutdown signal; the power supply management device is also configured to stop outputting a first enable signal to the first controller when receiving the first power-off signal.
  • the first controller is further configured to output a maintenance signal to the power supply management device when receiving a start signal; the power supply management device is further configured to continue to output the first enable signal to the first controller when losing the start signal and receiving the maintenance signal.
  • the first controller is also configured to stop outputting a maintenance signal to the power supply management device after waiting for a sixth preset time period when receiving a shutdown signal; the power supply management device is also configured to stop outputting a first enable signal to the first controller when the maintenance signal is lost.
  • the electric tool also includes: a parameter detection device, connected to the motor and the second controller, and configured to detect the operating parameters of the motor and transmit the operating parameters of the motor to the second controller; the second controller is also configured to output a second power-off signal to the power supply management device after receiving the shutdown signal and after a seventh preset time period, when the operating parameters are still in a changing state; the power supply management device is also configured to stop outputting the first enable signal to the first controller when receiving the second power-off signal.
  • a parameter detection device connected to the motor and the second controller, and configured to detect the operating parameters of the motor and transmit the operating parameters of the motor to the second controller
  • the second controller is also configured to output a second power-off signal to the power supply management device after receiving the shutdown signal and after a seventh preset time period, when the operating parameters are still in a changing state
  • the power supply management device is also configured to stop outputting the first enable signal to the first controller when receiving the second power-off signal.
  • the second controller is further configured to stop outputting the drive enable signal to the drive device after receiving the shutdown signal and a seventh preset time period has elapsed.
  • the first controller is further configured to stop outputting the driving signal to the driving device when the first enabling signal is lost.
  • a method for controlling an electric tool comprises: when the electric tool is switched to an on state, operating The device outputs a start signal to the first controller and the second controller; when the first controller receives the start signal, it outputs a drive signal to the drive device; when the second controller receives the start signal, it outputs a drive enable signal to the drive device; when the drive device receives the drive signal and the drive enable signal, the drive motor runs.
  • FIG. 1 is a perspective view of an electric power tool according to an embodiment.
  • FIG. 2 is a schematic diagram of the electric control principle of the electric tool shown in FIG. 1 .
  • FIG. 3 is a circuit block diagram of an operating device in the electric tool shown in FIG. 2 .
  • FIG. 4 is a circuit block diagram of the power supply management device in the electric tool shown in FIG. 2 .
  • FIG. 5 is a circuit block diagram of a driving device in the electric tool shown in FIG. 2 .
  • FIG. 6 is another circuit block diagram of the driving device in the electric tool shown in FIG. 2 .
  • FIG. 7 is another electrical control schematic diagram of the electric tool shown in FIG. 1 .
  • FIG. 8 is a circuit block diagram of the power supply management device in the electric tool shown in FIG. 7 .
  • FIG. 9 is another electrical control schematic diagram of the electric tool shown in FIG. 1 .
  • FIG. 10 is a circuit block diagram of the power supply management device in the electric tool shown in FIG. 9 .
  • FIG. 11 is a flow chart of a method for controlling an electric tool according to an embodiment.
  • FIG. 12 is a perspective view of an electric power tool according to an embodiment.
  • FIG. 13 is a schematic diagram of the electrical control principle of the electric tool shown in FIG. 12 .
  • FIG. 14 is a circuit block diagram of the motor, the driving device, the first controller, and the second controller in the electric tool shown in FIG. 13 .
  • FIG. 15 is a partial circuit diagram of a driving device in the electric tool shown in FIG. 14 .
  • FIG. 16 is another electrical control schematic diagram of the electric tool shown in FIG. 12 .
  • FIG. 17 is a partial circuit diagram of the power supply management device and the operating device in the electric tool shown in FIG. 16 .
  • FIG. 18 is another electrical control schematic diagram of the electric tool shown in FIG. 12 .
  • FIG. 19 is a partial circuit diagram of the power supply management device and the operating device in the electric tool shown in FIG. 18 .
  • FIG. 20 is a flow chart of a method for controlling an electric tool according to an embodiment.
  • the term "and/or” is a description of the association relationship between related objects, indicating that three relationships can exist.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this application generally indicates that the related objects before and after are in an "and/or” relationship.
  • connection may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation.
  • direct connection refers to two parts or components being connected together without the need for an intermediate piece
  • indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece.
  • connect and “couple” are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.
  • relative terms e.g., "about,” “approximately,” “substantially,” etc.
  • the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values that do not use relative terms should also be disclosed as specific values with tolerances.
  • substantially may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).
  • the function performed by a component can be performed by one component, multiple components, one part, or multiple parts.
  • the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.
  • controller In this application, the terms “controller”, “processor”, “central processing unit”, “CPU”, and “MCU” are interchangeable. When a unit “controller”, “processor”, “central processing unit”, “CPU”, or “MCU” is used to perform a specific function, unless otherwise specified, these functions can be performed by a single unit or multiple units.
  • the terms “device”, “module” or “unit” may be implemented in the form of hardware or software to achieve specific functions.
  • the terms “calculate”, “judge”, “control”, “determine”, “identify”, etc. refer to the operations and processes of a computer system or similar electronic computing device (e.g., controller, processor, etc.).
  • Fig. 1 shows an electric tool 100 as an embodiment of the present application.
  • the electric tool 100 shown in Fig. 1 is a bench-type tool, and the electric tools in other embodiments may also be handheld electric tools or other forms of electric tools.
  • the power tool 100 has a main function and at least one auxiliary function.
  • the main function is the original intention of the user to use the power tool 100. In most cases, the main function is realized by the motor drive.
  • the main function can be a cutting function.
  • the auxiliary function can be a related function that assists the main function, or a secondary function that is unrelated to the main function.
  • the auxiliary function can be a display function, including the display function of the table saw mode indicator light, the display function of the miter saw speed control interface, etc.
  • the electric tool 200 includes: a motor 10, a power supply management device 20 and a drive device 30.
  • the motor 10 can be connected to a cutting component such as a saw blade, and after operation, it can drive a cutting component such as a saw blade to realize the main functions of the electric tool 200.
  • the motor 10 can be a brushless motor.
  • the power supply management device 20 includes a power supply, which can at least supply power to the motor 10.
  • the power supply management device 20 may include a power supply, a transistor, and a power chip.
  • the drive device 30 is connected to the motor 10, and can drive the motor 10 to operate to realize the main functions of the electric tool 200.
  • the drive device 30 may include a three-phase inverter bridge.
  • the electric tool 200 also includes an operating device 40 for the user to operate to enable any one or more functions of the electric tool 200.
  • the operating device 40 may include a mechanical switch, a signal switch, etc.
  • the operating device 40 is connected to the power supply management device 20. After the user operates to enable any one or more functions of the electric tool 200, the operating device 40 may output a function signal corresponding to the function enabled by the user to the power supply management device 20.
  • the function signal corresponding to the main function is the main function signal
  • the function signal corresponding to each auxiliary function is the auxiliary function signal.
  • the user only enables the main function through the operating device 40, and the operating device 40 only outputs the main function signal to the power supply management device 20; in another case, the user enables any one or more auxiliary functions, and the operating device 40 outputs the function signal corresponding to each enabled auxiliary function. in other cases, the user enables both the main function and any one or more auxiliary functions, and the operating device 40 simultaneously outputs the main function signal and the corresponding auxiliary function signal.
  • the power supply management device 20 can receive function signals from the operating device 40, and can be set to output a first enable signal that meets the voltage requirement of the first controller 50, such as a 12V voltage signal, after receiving any function signal; and output a third enable signal to the drive device 30 after receiving the main function signal.
  • a first enable signal that meets the voltage requirement of the first controller 50, such as a 12V voltage signal, after receiving any function signal.
  • the power supply management device 20 only receives the main function signal, outputs the first enable signal to the first controller 50, and outputs the third enable signal to the drive device 30; in another case, the power supply management device 20 receives any one or more auxiliary function signals, and outputs the first enable signal to the first controller 50; in other cases, the power supply management device 20 receives both the main function signal and any one or more auxiliary function signals, outputs the first enable signal to the first controller 50, and outputs the third enable signal to the drive device 30.
  • the electric tool 200 also includes a first controller 50 for controlling the realization of the main function.
  • the first controller 50 may include a processor such as a CPU, an MCU, and a memory storing instructions executable by the processor.
  • the first controller 50 is connected to the power supply management device 20 and the drive device 30, and can receive a first enable signal from the power supply management device 20. It can be configured to output a first drive signal to the drive device 30 after receiving at least the first enable signal.
  • the first controller 50 is also connected to the operating device 40. After the user operates to enable the main function, the operating device 40 also outputs the main function signal to the first controller 50. The first controller 50 will output the first drive signal to the drive device 30 after receiving the first enable signal and the main function signal.
  • the driving device 30 is capable of receiving a third enable signal from the power supply management device 20 and a first drive signal from the first controller 50, and can be configured to drive the motor 10 to operate to realize the main functions of the power tool 200 after receiving the third enable signal and the first drive signal; and cannot drive the motor 10 to operate when only the first drive signal is received and the third enable signal is not received.
  • FIG. 3 is a circuit block diagram of the operating device 40 in the electric tool 200 shown in FIG. 2 .
  • the operating device 40 may include a switch 41 representing a main function, a switch 42 representing a first auxiliary function, and a switch 43 representing a second auxiliary function.
  • the A terminal is connected to the power supply, when the user presses the switch 41, the AB terminal is connected, and the main function signal can be obtained from the B terminal; when the user presses the switch 42, the AC terminal is connected, and the auxiliary function signal corresponding to the first auxiliary function can be obtained from the C terminal; when the user presses the switch 43, the AD terminal is connected, and the auxiliary function signal corresponding to the second auxiliary function can be obtained from the D terminal; and when the user presses any one or more of the switch 41, the switch 42 or the switch 43, the E terminal can detect that the user has enabled at least one function.
  • FIG. 4 is a circuit block diagram of the power management device 20 in the power tool 200 shown in FIG. 2.
  • the power management device 20 may include a power supply (not shown), a first transistor group 21, The first power chip 22 and the third transistor group 24.
  • the first transistor group 21 is connected to the operating device 40, the power supply, and the first power chip 22.
  • the first power chip 22 is also connected to the third transistor group 24 and the first controller 50.
  • the third transistor group 24 is also connected to the operating device 40 and the driving device 30.
  • the first transistor group 21 receives the main function signal from the operating device 40 and then turns on the path between it and the first power chip 22.
  • the first power chip 22 then outputs the first enable signal to the third transistor 24 and the first controller 50.
  • the third transistor 24 receives the first enable signal from the first power chip 22 and the main function signal from the operating device 40, it outputs the third enable signal to the drive device 30.
  • the first transistor group 21 When the user enables any one or more auxiliary functions but does not enable the main function, the first transistor group 21 receives the auxiliary function signal from the operating device 40 and then turns on the path between it and the first power chip 22. The first power chip 22 then outputs the first enable signal to the third transistor 24 and the first controller 50. However, the third transistor 24 does not receive the main function signal and cannot output the third enable signal to the drive device 30.
  • the drive device 30 may include a drive circuit 31 and a drive signal generating circuit 32.
  • the drive circuit 31 is connected to the drive signal generating circuit 32 and the first controller 50, and may be a three-phase inverter bridge composed of six switching elements, and the motor 10 can be controlled to change phase by controlling the on and off of the six switching elements;
  • the drive signal generating circuit 32 is also connected to the power supply management device 20 and the first controller 50, and may be a bootstrap circuit that can perform voltage boost processing on the received signal.
  • the first controller 50 may also be configured to, after receiving at least the first enable signal, output a first drive signal for controlling three switch elements in the drive circuit 31 to the drive circuit 31, and output a second drive signal for controlling another three switch elements in the drive circuit 31 to the drive signal generation circuit 32.
  • the first controller 50 includes, in addition to the processor and the memory, a power amplifier circuit that can amplify the power of the first drive signal to be output and output the amplified first drive signal to the drive circuit 31.
  • the drive signal generating circuit 32 receives a second drive signal from the first controller 50 and a third enable signal from the power supply management device 20, and can be configured to boost the second drive signal and output the boosted second drive signal to the drive circuit 31 after receiving the second drive signal and the third enable signal.
  • the driving circuit 31 is capable of receiving a first driving signal from the first controller 50 and a second driving signal from the driving signal generating circuit 32 , and can be configured to drive the motor 10 to operate to realize the main functions of the power tool 200 after receiving the first driving signal and the second driving signal.
  • the drive signal generating circuit 32 When the user activates the main function, the drive signal generating circuit 32 outputs the second drive signal after the boost processing to the drive circuit 31 after receiving the third enable signal from the power supply management device 20 and the second drive signal from the first controller 50.
  • the drive circuit 31 receives the first enable signal from the first controller 50.
  • the driving signal and the second driving signal from the driving signal generating circuit 32 drive the motor 10 to operate.
  • the drive signal generating circuit 32 does not receive the third enable signal from the power supply management device 20 and cannot output the second drive signal to the drive circuit 31.
  • the drive circuit 31 does not receive the second drive signal from the drive signal generating circuit 32 and cannot drive the motor 50 to operate.
  • FIG6 is another circuit block diagram of the driving device 30 in the electric tool 200 shown in FIG2 .
  • the driving device 30 may include a driving circuit 31 and a driving integrated chip 33.
  • the driving circuit 31 is connected to the driving integrated chip 33; the driving integrated chip 33 is also connected to the power supply management device 20 and the first controller 50.
  • the first controller 50 may also be configured to output the first and/or second drive signals for controlling the drive circuit 31 to the drive integrated chip 33 after receiving at least the first enable signal.
  • the drive integrated chip 33 receives the drive signal from the first controller 50 and the third enable signal from the power supply management device 20, and may be configured to process the drive signal and output the processed drive signal to the drive circuit 31 after receiving the drive signal and the third enable signal.
  • the drive circuit 31 is capable of receiving the processed drive signal from the drive integrated chip 33, and may be configured to drive the motor 10 to operate to realize the main functions of the power tool 200 after receiving the drive signal.
  • the driver integrated chip 33 When the user enables the main function, the driver integrated chip 33 outputs the processed drive signal to the drive circuit 31 after receiving the third enable signal from the power supply management device 20 and the drive signal from the first controller 50. After receiving the drive signal from the driver integrated chip 33, the drive circuit 31 drives the motor 10 to operate.
  • the driver integrated chip 33 When the user enables any one or more auxiliary functions but does not enable the main function, the driver integrated chip 33 does not receive the third enable signal from the power supply management device 20 and cannot output the processed drive signal to the drive circuit 31.
  • the drive circuit 31 does not receive the drive signal from the driver integrated chip 33 and cannot drive the motor 10 to operate.
  • At least two drive signals are required for the normal operation of the drive motor.
  • the first drive signal can be issued after the first controller is powered on
  • the third enable signal issued by the power supply management device is independently dependent on user operation, thereby ensuring that the motor will not start accidentally when the auxiliary function is enabled but the main function is not enabled or when the first controller fails, thereby meeting product safety regulations and improving the safety of the tool and the user experience.
  • the power tool 200 may also have only the main function.
  • the operating device 40 When the user activates the main function of the power tool 200, the operating device 40 outputs the main function signal to the power supply management device 20. After receiving the main function signal, the power supply management device 20 outputs the first enable signal to the first controller 50 and outputs the third enable signal to the drive device 30. After receiving at least the first enable signal, the first controller 50 outputs the first drive signal to the drive device 30. After receiving the third enable signal, the drive device 30 outputs the first drive signal. After receiving the first driving signal, the motor 10 is driven to operate to realize the main function, so that the electric tool motor will not start accidentally when the first controller fails, which can ensure user safety and improve user experience.
  • FIG7 is another electric control principle diagram of the electric tool shown in FIG1 .
  • the electric tool 300 may also include an auxiliary device 60.
  • the number of the auxiliary devices 60 may correspond to the number of auxiliary functions of the electric tool 300, that is, each auxiliary device implements a corresponding auxiliary function.
  • the auxiliary function is a display function
  • the auxiliary device may be an LED light group or a display screen.
  • the operating device 40 can also output a function signal corresponding to the function enabled by the user to the second controller 70 to be described later.
  • the power supply management device 20 can also be configured to output a second enable signal that meets the voltage requirement of the second controller 70, such as a 3.3V voltage signal, after receiving any function signal.
  • the electric tool 300 also includes a second controller 70 for controlling the auxiliary function.
  • the second controller 70 may include a processor such as a CPU or an MCU and a memory storing instructions executable by the processor.
  • the second controller 70 is connected to the operating device 10 and the power supply management device 20, and can receive a function signal from the operating device 10 and a second enable signal from the power supply management device 20. After receiving the second enable signal and the auxiliary function signal, the second controller 70 controls the operation of the corresponding auxiliary device to realize the corresponding auxiliary function.
  • the electric tool 300 has an auxiliary function of an interface display function.
  • the auxiliary device includes an interface display device 61 corresponding to the interface display function.
  • the operating device 40 After the user enables the interface display function through the operating device 40, the operating device 40 outputs a first auxiliary function signal corresponding to the interface display function to the power supply management device 20 and the second controller 70.
  • the power supply management device 20 outputs a second enable signal to the second controller 70.
  • the second controller 70 lights up the interface display device 61 and turns off the interface display device 61 after the first preset time T1.
  • the electric tool 300 has another auxiliary function in addition to the interface display function: a power display function.
  • the auxiliary device includes, in addition to the interface display device 61, a power display device 62 corresponding to the power display function.
  • the user enables the power display function and the power display function at the same time through the operating device 40.
  • the operating device 40 outputs a first auxiliary function signal corresponding to the interface display function and a second auxiliary function signal corresponding to the power display function to the power management device 20 and the second controller 70.
  • the power management device 20 outputs a second enable signal to the second controller 70.
  • the second controller 70 After receiving the second enable signal, the first auxiliary function signal and the second auxiliary function signal, the second controller 70 lights up the interface display device 61 and turns off the interface display device 61 after a first preset time T1, and lights up the power display device 62 and turns off the power display device 62 after a second preset time T2.
  • the first preset time T1 may be 5 minutes
  • the second preset time length T2 may be 10 seconds.
  • FIG8 is a circuit block diagram of the power supply management device 20 in the power tool 300 shown in FIG7 .
  • the power supply management device 20 may include a power supply (not shown), a first transistor group 21, a first power chip 22, a second transistor group 23, a third transistor group 24, and a second power chip 25.
  • the first transistor group 21 is connected to the operating device 40, the power supply, and the first power chip 22, the first power chip 22 is also connected to the second transistor group 23 and the second power chip 25, the second transistor group 23 is also connected to the first controller 50 and the third transistor group 24, and the third transistor group 24 is also connected to the operating device 40 and the driving device 30.
  • the first transistor group 21 receives the main function signal from the operating device 40 and then turns on the path between it and the first power chip 22.
  • the first power chip 22 then turns on the path between it and the second power chip 25 and the second transistor group 23.
  • the second power chip 25 then outputs a second enable signal to the second controller 70.
  • the second transistor group 23 then outputs the first enable signal to the first controller 50 and the third transistor group 24.
  • the third transistor group 24 receives the first enable signal from the second transistor group 22 and the main function signal from the operating device 40, and then outputs the third enable signal to the drive device 30.
  • the first transistor group 21 receives the auxiliary function signal from the operating device 40 and then turns on the path between it and the first power chip 22.
  • the first power chip 22 then turns on the path between it and the second power chip 25 and the second transistor group 23.
  • the second power chip 25 then outputs the second enable signal to the second controller 70.
  • the second transistor group 23 then outputs the first enable signal to the first controller 50 and the third transistor group 24.
  • the third transistor 24 does not receive the main function signal and cannot output the third enable signal to the drive device 30.
  • the first power chip no longer directly supplies power to the first controller. Instead, the first power chip leads to the second transistor group and the second power chip to supply power to the first and second controllers respectively, so that the power supply processes of the first and second controllers can be independent of each other, and the interruption of power supply to the first controller will not interfere with the second controller.
  • two controllers are used to be responsible for the main function and auxiliary function of the power tool respectively.
  • the first controller and the second controller can independently control the motor and each auxiliary device to realize the corresponding functions without interfering with each other, thereby ensuring that the power tool can work normally according to the user's actual intention.
  • the electric tool 400 may include a motor 10 , a power management device 20 , a driving device 30 , a driving device 40 , a first controller 50 , an auxiliary device 60 , and a second controller 70 .
  • the operating device 40 can also interrupt the output of the function signal corresponding to the function turned off by the user to the power supply management device 20 and the second controller 70 after the user turns off any one or more functions of the power tool 400.
  • the second controller 70 When the second controller 70 loses the functional signal from the operating device 40, it can be set to output a first maintenance signal to the power supply management device 20 after losing the main functional signal and interrupt the transmission of the first maintenance signal after a third preset time T3; and after losing all functional signals, output a second maintenance signal and a third maintenance signal to the power supply management device 20, interrupt the transmission of the second maintenance signal after a fourth preset time T4, and interrupt the transmission of the third maintenance signal after a fifth preset time T5.
  • the power supply management device 20 loses the functional signal from the operating device 40 and receives the maintenance signal from the second controller 70. It can be set to continue the output of the third enable signal when the main functional signal is lost and the first maintenance signal is obtained, and after the third preset time T3, after the main functional signal and the first maintenance signal are lost, the output of the third enable signal to the driving device 30 is interrupted; when all functional signals are lost and the second maintenance signal is obtained, the output of the first enable signal continues, and after the fourth preset time T4, after all functional signals and the second maintenance signal are lost, the output of the first enable signal to the first controller 50 is interrupted; and when all functional signals are lost and the third maintenance signal is obtained, the output of the second enable signal continues, and after the fifth preset time T5, after all functional signals and the third maintenance signal are lost, the output of the second enable signal to the second controller 70 is interrupted.
  • the third preset time length T3 is less than or equal to the fourth preset time length T4, and the fourth preset time length T4 is less than or equal to the fifth preset time length T5.
  • the third preset time length T3 and the fourth preset time length T4 can be 10 seconds
  • the fifth preset time length T5 can be 5 minutes.
  • the fifth preset time length T5 is greater than or equal to the time taken by each auxiliary device to realize the corresponding auxiliary function, so that the auxiliary function can be completed before the device is powered off.
  • the first preset time length T1 for the interface display device 61 to realize the interface display function is 5 minutes
  • the second preset time length T2 for the power display device 62 to realize the power display function is 10 seconds
  • the fifth preset time length T5 can be 5 minutes.
  • FIG. 10 is a circuit block diagram of the power supply management device 20 in the power tool 400 shown in FIG. 9 .
  • the power supply management device 20 may include a power supply (not shown), a first transistor group 21, a first power supply chip 22, a second transistor group 23, a third transistor group 24, and a second power supply chip 25.
  • the first transistor group 21 is connected to the operating device 40, the power supply, the first power supply chip 22, and the second controller 70
  • the first power supply chip 22 is also connected to the second transistor group 23 and the second power supply chip 25
  • the second transistor group 23 is also connected to the first controller 50, the third transistor group 24, and the second controller 70
  • the third transistor group 24 is also connected to the operating device 40, the driving device 30, and the second controller 70.
  • the third preset time length T3 and the fourth preset time length T4 are 10 seconds, and the fifth preset time length T5 is 5 minutes.
  • the third transistor group 24 obtains the first maintenance signal when the main function signal is lost, and can continue to output the third enable signal until the first maintenance signal is lost after 10 seconds, and the output of the third enable signal to the driving device 30 is interrupted, so that the motor 10 stops rotating 10 seconds after the user turns off the main function.
  • the second controller 70 can still implement the corresponding auxiliary function according to the corresponding time control required by each auxiliary function.
  • the second transistor group 23 obtains the second maintenance signal when all function signals are lost, and can continue to output the first enable signal until the second maintenance signal is lost after 10 seconds, interrupting the output of the first enable signal to the first controller 50, so that the first controller 50 is powered off 10 seconds after the user turns off all functions.
  • the first transistor group 21 obtains the third maintenance signal when all function signals are lost, and can continue to conduct the path between it and the first power chip 22 and the second power chip 25, and maintain the output of the second enable signal until the third maintenance signal is lost after 5 minutes, disconnecting the path between it and the first power chip 22 and the second power chip 25, and the second power chip 25 interrupts the output of the second enable signal to the second controller 70, so that the second controller 70 is powered off 5 minutes after the user turns off all functions. In these 5 minutes, for each auxiliary function signal that has been received, the second controller 70 can still implement the corresponding auxiliary function according to the time control required by each auxiliary function.
  • the second controller outputs a corresponding maintenance signal to the power supply management device according to the corresponding preset duration based on the function turned off by the user.
  • the power supply management device determines whether to interrupt the output of the enable signal and the drive signal based on the function signal and the maintenance signal to ensure that the first and second controllers can successfully execute various functions without interfering with each other, and can also cut off power in time after the function is executed, thereby meeting product safety regulations and improving the safety of the tool and the user experience.
  • Fig. 11 shows a control method of an electric tool as an embodiment of the present application.
  • the control method shown in Fig. 11 can be applied to the electric tool described above.
  • the control method of the electric tool may include the following specific steps:
  • the operating device when the user activates one or more functions of the electric tool, the operating device outputs a function signal corresponding to the function activated by the user to the power supply management device;
  • the power supply management device outputs a first enable signal to the first controller when receiving any function signal, and outputs a third enable signal to the driving device when receiving a main function signal corresponding to a main function;
  • FIG12 shows an electric tool 500 as another embodiment of the present application.
  • the electric tool 500 shown in FIG12 is a DC electric drill.
  • the electric tools in other embodiments may also be other types of handheld electric tools such as nail guns and electric circular saws, or bench-type tools such as table saws and miter saws.
  • FIG. 13 is an electric control schematic diagram of the electric tool 500 shown in FIG. 12 .
  • the electric tool 500 includes: a motor 510 , a power supply management device 520 , and a drive device 530 .
  • the motor shaft of the motor 510 can drive the output shaft to rotate directly or indirectly through a transmission assembly after rotation, so that the output shaft drives the assembly parts such as a drill bit and a saw blade connected thereto to perform operations such as fastening and cutting.
  • the motor 510 can be a DC brushless motor.
  • the power supply management device 520 includes a power supply and can at least supply power to the motor 510 .
  • the power supply management device 520 can include a power supply such as a detachable battery pack, and integrated power supply chips, transistors, and components such as resistors, capacitors, and inductors.
  • the drive device 530 is connected to the motor 510 and can drive the motor 510 to operate for operations such as fastening and cutting.
  • the drive device 530 can include a three-phase inverter bridge, a drive chip, and the like.
  • the electric tool 500 also includes an operating device 540 for the user to operate to switch the switch state of the electric tool 500.
  • the operating device 540 may include a mechanical switch, a signal switch, etc.
  • the operating device 540 is connected to the power supply management device 520, and is connected to the first controller 550 and the second controller 560 to be described later.
  • the operating device 540 may output a start signal to the first controller 550 and the second controller 560, which indicates that the electric tool is activated.
  • the operating device 540 may output a shutdown signal to the first controller 550 and the second controller 560, which indicates that the electric tool is deactivated.
  • the start signal and the shutdown signal may be voltage signals or voltage jump signals, for example, a high voltage signal is a start signal, and a low voltage signal is a shutdown signal.
  • the start signal and the shutdown signal may also be digital signals with more complex formats that carry specific information.
  • the power tool 500 also includes a first controller 550 and a second controller 560.
  • the first controller 550 may include a processor such as a CPU (Central Processing Unit), an MCU (Microcontroller Unit), and a memory storing processor executable instructions, and the same is true for the second controller 560.
  • a processor such as a CPU (Central Processing Unit), an MCU (Microcontroller Unit), and a memory storing processor executable instructions, and the same is true for the second controller 560.
  • the first controller 550 is connected to the driving device 530 and the operating device 540, and can receive a start signal from the operating device 540.
  • the first controller 550 can be configured to output a drive signal to the driving device 530 when receiving the start signal.
  • the drive signal is a control signal of the driving device 530, which is used to control the driving device 530 to work normally.
  • the second controller 560 is connected to the driving device 530 and the operating device 540 and can receive commands from the operating device 540.
  • the second controller 560 may be configured to output a drive enable signal to the drive device 530 upon receiving the start signal.
  • the drive enable signal is a power supply signal or an activation signal of the drive device 530, which is used to provide power to the drive device 530 or activate and turn on components in the drive device 530.
  • the driving device 530 is connected to the motor 510, the first controller 550 and the second controller 560, and can receive the driving signal from the first controller 550 and the driving enable signal from the second controller 560.
  • the driving device 530 can be configured to drive the motor 510 to operate when the driving signal and the driving enable signal are received; and cannot drive the motor 510 to operate when only the driving signal is received but the driving enable signal is not received, or when only the driving enable signal is received but the driving signal is not received.
  • the drive device 530 may be a drive circuit composed of a plurality of semiconductor switch elements.
  • the drive circuit may be composed of six semiconductor switch elements.
  • the drive signal output by the first controller 550 will be transmitted to each semiconductor switch element in the drive device 530 to change the on-off state of each semiconductor switch element, and then change the voltage state or current state applied to each winding of the motor 510, thereby controlling the motor 510 to change phase.
  • the drive enable signal output by the second controller 560 will also be transmitted to the drive device 530 to supply power or turn on the components therein, so that the motor control based on the above drive signal has an energy basis or can be smoothly activated. As shown in FIG. 14 and FIG.
  • the motor 510 is a three-phase motor
  • the drive circuit of the U phase in the drive device 530 may include a plurality of transistors Q11, Q12, a plurality of resistors and a rectifier diode, etc.
  • the transistors Q11 and Q12 in the drive circuit may also be replaced by other semiconductor components such as optocouplers.
  • the input signal of transistor Q11 is the drive enable signal PWM_EN
  • the input signal of transistor Q12 is the drive signal ULO. After the drive enable signal PWM_EN is connected, Q11 and Q12 are turned on, and the output signal ULO' of transistor Q12 can be output to the semiconductor switch element.
  • the operating device 540 may be a toggle switch, which can output an on signal when it is toggled to a position corresponding to the on state, and can output a off signal when it is toggled to a position corresponding to the off state.
  • the operating device 540 may be a touch switch, and when the electric tool 500 is switched from the off state to the on state, the touch switch is pressed, and the switch contacts briefly contact and then separate.
  • the jump signal generated is the on signal.
  • the on signal can be a jump signal from high voltage to low voltage.
  • the touch switch is pressed again, and the switch contacts briefly contact and then separate.
  • the jump signal generated is the off signal.
  • the touch switch is not pressed, the switch contacts are not in contact, and a stable non-jump signal can be continuously output to the outside. For example, a high voltage signal can be continuously output.
  • the driving motor needs to be driven by the first
  • the controller provides a control drive signal
  • the second controller provides an enabling drive enable signal. Both controllers respond to the start signal to output signals. No matter which of the two controllers fails, the motor cannot be driven to operate, thereby providing double protection for the normal operation of the motor, preventing the problem of accidental startup, and improving the safety of the tool and the user experience.
  • the first controller 550 may also be configured to stop outputting the drive signal to the drive device 530 upon receiving a shutdown signal from the operating device 540.
  • the drive device 530 will not be able to drive the motor 510 to operate after losing the drive signal, and the motor 510 will therefore stop rotating.
  • the second controller 560 may also be configured to stop outputting the drive enable signal to the drive device 530 upon receiving a shutdown signal from the operating device 540.
  • the drive device 530 will not be able to drive the motor 510 to operate after losing the drive signal and the drive enable signal, and the motor 510 will therefore stop rotating.
  • both of the dual controllers stop outputting the signal in response to the shutdown signal, and when no failure occurs in the dual controllers, the motor can be ensured to stop rotating smoothly.
  • FIG. 16 is an electric control schematic diagram of an electric tool 600 as another embodiment of the present application.
  • the electric tool 600 includes a motor 610, a power supply management device 620, a drive device 630, an operating device 640, a first controller 650, and a second controller 660.
  • the electric tool 600 can partially or completely refer to the components and settings of the motor 510, the power supply management device 520, the drive device 530, the operating device 540, the first controller 550, and the second controller 560 in the electric tool 500 according to the needs.
  • the difference between the electric tool 600 and the electric tool 500 is at least that the electric energy of the first controller 650 in the electric tool 600 is provided by the power supply management device 620, the power supply process of the power supply management device 620 is controlled by the first controller 650, and the electric tool 600 can realize the delayed shutdown function.
  • the power supply management device 620 is connected to the operating device 640 and the first controller 650.
  • the power supply management device 620 can receive the start signal from the operating device 640, and can be configured to output a first enable signal to the first controller 650 when receiving the start signal from the operating device 640, so that the first controller 650 is powered.
  • the first enable signal is a power supply signal of the first controller 650, and can be a voltage signal that meets its voltage requirements.
  • the power supply management device 620 is also connected to the second controller 660, and when receiving the start signal, in addition to outputting the first enable signal to the first controller 650, it can also be configured to output a second enable signal to the second controller 660, so that the second controller 660 is powered.
  • the first controller 650 may also be configured to output a first power-off signal to the power management device 620 after waiting for a sixth preset time period T6 upon receiving a shutdown signal from the operating device 640.
  • the first power-off signal may be a voltage signal.
  • the first power-off signal is output to the power supply management device 620, that is, the sixth preset duration is zero.
  • the power supply management device 620 can be configured to stop outputting the first enable signal to the first controller 650 when the first power-off signal is received.
  • the power supply management device 620 when the first power-off signal is received, in addition to stopping outputting the first enable signal to the first controller 650, the power supply management device 620 can also be configured to stop outputting the second enable signal to the second controller 660. It can be understood that in other embodiments, the power-off logic of the first controller 650 and the second controller 660 can also be independent of each other.
  • the power supply management device 620 can be configured to continue to output the first enable signal to the first controller 650 when the start signal from the operating device 640 is lost, but the maintenance signal from the first controller 650 is received. In some embodiments, it also continues to output the second enable signal to the second controller 660.
  • the first controller 650 may also be configured to stop outputting a maintenance signal to the power management device 620 when receiving a shutdown signal from the operating device 640, so that the power management device 620 no longer supplies power.
  • the power management device 620 may be configured to stop outputting the first enable signal to the first controller 650 when losing the start signal and the maintenance signal, and in some embodiments, also stop outputting the second enable signal to the second controller 660. At this time, the first controller 650 no longer outputting the maintenance signal to the power management device 620 can be regarded as outputting the first power-off signal to the power management device 620.
  • the operating device 640 is a touch switch, and part of the power supply circuit in the power supply management device 620 may include a plurality of transistors Q21, Q22, Q23, a plurality of resistors, capacitors, and voltage-stabilizing diodes.
  • the transistors Q21, Q22, Q23 in the power supply circuit may also be replaced by other semiconductor components such as optocouplers.
  • the input signal of the transistor Q23 may be connected to the maintenance signal Powerkeep from the first controller 650.
  • the transistor Q21 When the switch contacts in the operating device 640 are in contact, the transistor Q21 is short-circuited, the transistor Q22 is turned on, the power supply management device 620 is powered on successfully, and Q22 generates an output signal, which can be used as a first enable signal after voltage conversion and other processing. In some embodiments, it can also be used as a second enable signal. After the switch contacts in the operating device 640 are separated, Q21 is no longer turned on and Q22 is also not turned on. In order to enable the power supply management device 620 to maintain the power supply state, the first controller 650 receives the start signal and outputs the maintenance signal Powerkeep.
  • the maintenance signal Powerkeep will turn on Q23, and the output signal of Q23 can make Q21 and Q22 continue to be turned on, and Q22 can continue to output signals.
  • the first enable signal can therefore continue to be output to the first controller 650.
  • the second enable signal also continues to be output to the second controller 660.
  • the first controller 650 When the first controller 650 does not fail, after receiving the shutdown signal and waiting for the sixth preset time T6, the first controller 650 no longer outputs the maintenance signal Powerkeep, Q23 is no longer turned on, Q21 and Q22 are no longer turned on, Q22 no longer outputs a signal, and the first enable signal output to the first controller 650 is interrupted. In some embodiments, the second enable signal output to the second controller 660 is also interrupted.
  • FIG. 18 is an electric control schematic diagram of an electric tool 700 as another embodiment of the present application.
  • the electric tool 700 includes a motor 710, a power supply management device 720, a drive device 730, an operating device 740, a first controller 750, and a second controller 760, and further includes a parameter detection device 770.
  • the electric tool 700 can partially or completely refer to the components and settings of the motor 610, the power supply management device 620, the drive device 630, the operating device 640, the first controller 650, and the second controller 660 in the electric tool 600 according to the needs.
  • the difference between the electric tool 700 and the electric tool 600 is at least that the power supply process of the power supply management device 720 in the electric tool 700 is controlled by the second controller 760 in addition to the first controller 750, and can be safely shut down in the event of a failure of the first controller 750.
  • the second controller 760 is also connected to the power supply management device 720.
  • the second controller 760 is also configured to wait for the seventh preset time length T7 after receiving the shutdown signal from the operating device 740 to determine whether the operating parameters from the parameter detection device 770 are still in a changing state.
  • the seventh preset time length T7 may be less than or equal to the sixth preset time length T6.
  • the first controller 750 is not faulty, it has stopped outputting the drive signal to the drive device 730, and the drive device 730 has stopped driving the motor 710 to operate.
  • the operating parameters of the motor 710 should be in an unchanged state. Therefore, if the second controller 760 determines that the motor operating parameters from the parameter detection device 770 are not in a changing state, it can be inactive and wait for the sixth preset time length T6 to expire before shutting down naturally.
  • the first controller 750 may have a software failure or other problems.
  • the first controller 750 still outputs a driving signal to the driving device 730, and the driving device 730 still drives the motor 710 to operate.
  • the second controller 760 can be configured to send a signal to the power supply management unit 760.
  • the device 720 outputs a second power-off signal, which may be a voltage signal.
  • the power supply management device 720 may be configured to stop outputting the first enable signal to the first controller 750 when receiving the second power-off signal from the second controller 760.
  • the first controller 750 will stop outputting the drive signal to the drive device 730 when losing the first enable signal from the power supply management device 720, and the drive device 730 will not be able to drive the motor 710 to operate after losing the drive signal, so the motor 710 stops.
  • the power supply management device 720 may also be configured to stop outputting the second enable signal to the second controller 760 to power off the entire machine.
  • the second controller 760 may not stop outputting the driving enable signal when receiving a shutdown signal, but may be configured to stop outputting the driving enable signal to the driving device 730 after receiving the shutdown signal and experiencing the seventh preset time length T7, thereby avoiding the above-mentioned problem of transistor damage.
  • the operating device 740 is a touch switch, and part of the power supply circuit in the power supply management device 720 may include a plurality of transistors Q31, Q32, Q33, a plurality of resistors, capacitors, and voltage-stabilizing diodes.
  • the transistors Q31, Q32, and Q33 in the driving circuit may also be replaced by other semiconductor components such as optocouplers.
  • the input signal of the transistor Q31 may be connected to the second power-off signal Poweroff from the second controller 760
  • the input signal of the transistor Q33 may be connected to the maintenance signal Powerkeep from the first controller 750.
  • the maintenance signal Powekeep output by the first controller 750 turns on Q33, and Q31 and Q32 are also turned on.
  • the signal output by Q32 is used as the first enable signal after voltage conversion and other processing.
  • the first controller 750 cannot stop outputting the driving signal when receiving the shutdown signal, and the driving device 730 still drives the motor 710 to operate, and the parameter detection device 770 transmits the motor operating parameters of the changed state to the second controller 760.
  • the second controller 760 After receiving the seventh preset time length T7 of the shutdown signal, the second controller 760 determines that the current motor operating parameters are in a changed state, and outputs the second power-off signal Poweroff.
  • the second power-off signal Poweroff will disconnect Q21, and Q22 will also be disconnected. Q22 no longer outputs a signal, and the first enable signal output to the first controller 750 is interrupted.
  • the first controller 750 cannot output a driving signal to the driving device 730 due to the loss of power supply.
  • the driving device 730 stops driving the motor 710 due to the loss of the driving signal, and the motor 710 stops rotating.
  • Q22 no longer outputs a signal
  • the second enable signal output to the second controller 760 is also interrupted, and the entire machine loses power.
  • the second controller confirms whether the motor is still running through the state of the motor operating parameters, that is, whether the first controller is faulty, and tries to interrupt the power supply from the power supply management device to the first controller when the parameters change (the first controller fails), so that the second controller can be operated normally.
  • One controller loses power and stops outputting the drive signal, so that in the event of a failure in the first controller, the motor can be stopped or further shut down. As long as one of the dual controllers can still work normally, the problem of being unable to shut down will not occur, thereby improving the safety of the tool and the user experience.
  • Fig. 20 shows a flow chart of a control method of an electric tool as an embodiment of the present application.
  • the control method shown in Fig. 20 can be applied to the electric tool described above.
  • the control method of the electric tool may include the following specific steps:
  • the first controller when receiving the start signal, the first controller outputs a driving signal to the driving device;

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Abstract

本申请公开了一种电动工具。该电动工具，包括：电机；供电管理装置，包括电源并设置为至少为电机供电；驱动装置，设置为驱动电机运行以实现电动工具的主要功能；操作装置，设置为供用户操作以启用电动工具的一个或多个功能，并向供电管理装置输出对应于用户所启用功能的功能信号；电动工具具备主要功能以及至少一个辅助功能，功能信号包括对应于主要功能的主要功能信号与对应于各个辅助功能的辅助功能信号；其中，供电管理装置还被设置为在接收到任一功能信号时，输出第一使能信号，以及在接收到主要功能信号时，向驱动装置输出第三使能信号；电动工具还包括：第一控制器，与供电管理装置连接并设置为在至少接收到第一使能信号时，向驱动装置输出第一驱动信号；驱动装置，还被设置为在接收到第三使能信号且接收到第一驱动信号时，驱动电机运作。

Description

电动工具
本申请要求在2023年06月02日提交中国专利局、申请号为202310650856.2的中国专利申请的优先权以及2023年07月06日提交中国专利局、申请号为202310827744.X的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请具体涉及一种电动工具。
背景技术
电动工具在输出轴自由端一般装配有诸如钻头、锯片的功能件，并且设置有可供用户操作以切换工具开关状态的操作件。当用户操作使得电动工具由关闭状态切换为开启状态时，工具中的电机将被驱动运行，以使功能件进行紧固、切割等作业。当用户操作使得电动工具由开启状态切换为关闭状态时，工具中的电机将被控制停转，功能件也同样不进行作业。另外，在部分场景下，工具中的电机停转后，用户可能仍需使用电动工具的照明、显示等功能。
本部分提供了与本申请相关的背景信息，这些背景信息不一定是现有技术。
发明内容
本申请的一个目的是解决或至少减轻上述问题的一部分或者全部。为此，本申请的一个目的在于提供一种电动工具。
为了实现上述目标，本申请采用如下的技术方案：
一种电动工具，包括：电机；供电管理装置，包括电源并设置为至少为电机供电；驱动装置，设置为驱动电机运行以实现电动工具的主要功能；操作装置，设置为供用户操作以启用电动工具的一个或多个功能，并向供电管理装置输出对应于用户所启用功能的功能信号；电动工具具备主要功能以及至少一个辅助功能，功能信号包括对应于主要功能的主要功能信号与对应于各个辅助功能的辅助功能信号；其中，供电管理装置还被设置为在接收到任一功能信号时，输出第一使能信号，以及在接收到主要功能信号时，向驱动装置输出第三使能信号；电动工具还包括：第一控制器，与供电管理装置连接并设置为在至少接收到第一使能信号时，向驱动装置输出第一驱动信号；其中，驱动装置，还被设置为在接收到第三使能信号且接收到第一驱动信号时，驱动电机运作。
在一些实施例中，操作装置还被设置为在用户启用主要功能时，向第一控制器输出主要功能信号；第一控制器，还与操作装置连接，还被设置为在接收到第一使能信号且接收到主要功能信号时，向驱动装置输出第一驱动信号。
在一些实施例中，驱动装置包括驱动电路与驱动信号生成电路；第一控制器，还被设置为在至少接收到第一使能信号时，向驱动电路输出第一驱动信号，以及向驱动信号生成电路输出第二驱动信号；驱动信号生成电路，设置为在接收到第三使能信号且接收到第二驱动信号时，向驱动电路输出升压处理后的第二驱动信号；驱动电路，设置为在接收到第一驱动信号且接收到第二驱动信号时，驱动电机运作。
在一些实施例中，驱动装置包括驱动电路与驱动集成芯片；第一控制器，还被设置为在至少接收到第一使能信号时，向驱动集成芯片输出第一驱动信号；驱动集成芯片，设置为在接收到第三使能信号且接收到第一驱动信号时，向驱动电路输出处理后的第一驱动信号；驱动电路，设置为在接收到第一驱动信号时，驱动电机运作。
在一些实施例中，电动工具还包括：辅助装置，设置为实现电动工具的辅助功能；第二控制器，与操作装置连接且与供电管理装置连接；操作装置还被设置为向第二控制器输出对应于用户所启用功能的功能信号；供电管理装置，还被设置为在接收到任一功能信号时，向第二控制器输出第二使能信号；第二控制器，设置为在接收到第二使能信号且接收到对应于任一辅助功能的辅助功能信号时，控制对应的辅助装置运行以实现对应的辅助功能。
在一些实施例中，辅助功能包括界面显示功能，辅助装置包括对应于界面显示功能的界面显示装置；第二控制器，还被设置为在接收到第二使能信号且接收到对应于界面显示功能的辅助功能信号时，点亮界面显示装置并在第一预设时长后熄灭界面显示装置。
在一些实施例中，辅助功能包括电量显示功能，辅助装置包括对应于电量显示功能的电量显示装置；第二控制器，还被设置为在接收到第二使能信号且接收到对应于电量显示功能的辅助功能信号时，点亮电量显示装置并在第二预设时长后熄灭电量显示装置。
在一些实施例中，操作装置还被设置为供用户操作以关闭电动工具的一个或多个功能，并中断向第二控制器与供电管理装置输出对应于用户所关闭功能的功能信号。
在一些实施例中，第二控制器还被设置为在失去主要功能信号时，向供电管理装置输出第一维持信号并在第三预设时长后中断第一维持信号的传输；供电管理装置，还被设置为在失去主要功能信号且失去第一维持信号时，中断向 驱动装置输出第三使能信号。
在一些实施例中，第二控制器还被设置为在失去所有功能信号时，向供电管理装置输出第二维持信号并在第四预设时长后中断第二维持信号的传输；第四预设时长大于或等于第三预设时长；供电管理装置，还被设置为在失去所有功能信号且失去第二维持信号时，中断向第一控制器输出第一使能信号。
在一些实施例中，第二控制器还被设置为在失去所有功能信号时，还向供电管理装置输出第三维持信号并在第五预设时长后中断第三维持信号的传输；第五预设时长大于或等于第四预设时长；供电管理装置，还被设置为在失去所有功能信号且失去第三维持信号时，中断向第二控制器输出第二使能信号。
一种台型工具，包括：工作台，具备至少一个放置工件的工作平面；切割组件，作用于工件；电机，运作以驱动切割组件实现台型工具的主要功能；供电管理装置，包括电源并设置为至少为电机供电；驱动装置，设置为驱动电机运行以实现台型工具的主要功能；操作装置，设置为供用户操作以启用电动工具的一个或多个功能，并向供电管理装置输出对应于用户所启用功能的功能信号；台型工具具备主要功能以及至少一个辅助功能，功能信号包括对应于主要功能的主要功能信号与对应于各个辅助功能的辅助功能信号；其中，供电管理装置还被设置为在接收到任一功能信号时，输出第一使能信号，以及在接收到主要功能信号时，向驱动装置输出第三使能信号；台型工具还包括：第一控制器，与供电管理装置连接并设置为在至少接收到第一使能信号时，向驱动装置输出第一驱动信号；其中，驱动装置，还被设置为在接收到第三使能信号且接收到第一驱动信号时，驱动电机运作。
一种电动工具，包括：电机；供电管理装置，包括电源并设置为至少为电机供电；驱动装置，设置为驱动电机运行以实现电动工具的主要功能；操作装置，设置为供用户操作以启用主要功能，并向供电管理装置输出对应于主要功能的主要功能信号；其中，供电管理装置还被设置为在接收到主要功能信号时，输出第一使能信号，以及向驱动装置输出第三使能信号；电动工具还包括：第一控制器，与供电管理装置连接并设置为在至少接收到第一使能信号时，向驱动装置输出第一驱动信号；其中，驱动装置，还被设置为在接收到第三使能信号且接收到第一驱动信号时，驱动电机运作。
一种电动工具的控制方法，包括：操作装置在用户启用电动工具的一个或多个功能时，向供电管理装置输出对应于用户所启用功能的功能信号；供电管理装置在接收到任一功能信号时，向第一控制器输出第一使能信号，以及在接收到对应于主要功能的主要功能信号时，向驱动装置输出第三使能信号；第一控制器在至少接收到第一使能信号时，向驱动装置输出第一驱动信号；驱动装 置在接收到第三使能信号且接收到第一驱动信号时，驱动电机运作以实现主要功能。
一种电动工具，包括：电机；供电管理装置，包括电源并设置为至少向电机供电；驱动装置，设置为驱动电机运行；操作装置，设置为供用户操作以切换电动工具的开关状态，并输出对应的开启信号或关闭信号；其中，电动工具还包括：第一控制器，与操作装置以及驱动装置连接，并设置为在接收到开启信号时，向驱动装置输出驱动信号；第二控制器，与操作装置以及驱动装置连接，并设置为在接收到开启信号时，向驱动装置输出驱动使能信号；驱动装置，还被设置为在接收到驱动信号且接收到驱动使能信号时，驱动电机运行。
一些实施例中，第一控制器还被设置为在接收到关闭信号时，停止向驱动装置输出驱动信号。
一些实施例中，供电管理装置与第一控制器连接，供电管理装置还被设置为在接收到开启信号时，向第一控制器输出第一使能信号。
一些实施例中，第一控制器还被设置为在接收到关闭信号时，等待第六预设时长后向供电管理装置输出第一断电信号；供电管理装置还被设置为在接收到第一断电信号时，停止向第一控制器输出第一使能信号。
一些实施例中，第一控制器还被设置为在接收到开启信号时，向供电管理装置输出维持信号；供电管理装置还被设置为在失去开启信号而接收到维持信号时，继续向第一控制器输出第一使能信号。
一些实施例中，第一控制器还被设置为在接收到关闭信号时，等待第六预设时长后停止向供电管理装置输出维持信号；供电管理装置还被设置为在失去维持信号时，停止向第一控制器输出第一使能信号。
一些实施例中，电动工具还包括：参数检测装置，与电机以及第二控制器连接，并设置为检测电机的运行参数，并将电机的运行参数传输至第二控制器；第二控制器还被设置为在接收到关闭信号并经历第七预设时长后，在运行参数仍处于变化状态的情况下，向供电管理装置输出第二断电信号；供电管理装置还被设置为在接收到第二断电信号时，停止向第一控制器输出第一使能信号。
一些实施例中，第二控制器还被设置为在接收到关闭信号并经历第七预设时长后，停止向驱动装置输出驱动使能信号。
一些实例中，第一控制器还被设置为在失去第一使能信号时，停止向驱动装置输出驱动信号。
一种电动工具的控制方法，包括：在电动工具被切换为开启状态时，操作 装置向第一控制器以及第二控制器输出开启信号；第一控制器在接收到开启信号时，向驱动装置输出驱动信号；第二控制器在接收到开启信号时，向驱动装置输出驱动使能信号；驱动装置在接收到驱动信号且接收到驱动使能信号时，驱动电机运行。
附图说明
图1是一个实施例示出的电动工具的立体图。
图2是图1所示电动工具的电控原理图。
图3是图2所示电动工具中操作装置的电路框图。
图4是图2所示电动工具中供电管理装置的电路框图。
图5是图2所示电动工具中驱动装置的电路框图。
图6是图2所示电动工具中驱动装置的另一电路框图。
图7是图1所示电动工具的另一电控原理图。
图8是图7所示电动工具中供电管理装置的电路框图。
图9是图1所示电动工具的又一电控原理图。
图10是图9所示电动工具中供电管理装置的电路框图。
图11是一个实施例示出的电动工具的控制方法的流程图。
图12是一个实施例示出的电动工具的立体图。
图13是图12所示电动工具的电控原理图。
图14是图13所示电动工具中电机、驱动装置、第一控制器、第二控制器的电路框图。
图15是图14所示电动工具中驱动装置的部分电路图。
图16是图12所示电动工具的另一电控原理图。
图17是图16所示电动工具中供电管理装置、操作装置的部分电路图。
图18是图12所示电动工具的又一电控原理图。
图19是图18所示电动工具中供电管理装置、操作装置的部分电路图。
图20是一个实施例示出的电动工具的控制方法的流程图。
具体实施方式
在详细解释本申请的任何实施方式之前，应当理解，本申请不限于其应用 到以下描述中阐述的或以上附图中所示的结构细节和组件布置。
在本申请中，术语“包括”、“包含”、“具有”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
在本申请中，术语“和/或”，是一种描述关联对象的关联关系，表示可以存在三种关系。例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“和/或”的关系。
本申请中，术语“连接”、“结合”、“耦合”、“安装”可以是直接连接、结合、耦合或安装，也可以是间接连接、结合、耦合或安装。其中，进行举例示范，直接连接指的是两个零件或组件之间不需设置中间件而连接在一起，间接连接指的是两个零件或组件分别与至少一个中间件连接，这两个零件或组件通过中间件实现连接。此外，“连接”和“耦合”不限于物理或机械连接或耦合，并且可以包括电连接或耦合。
在本申请中，本领域普通技术人员将理解，结合数量或条件使用的相对术语(例如，“约”，“大约”，“基本”等)为包括所述值并且具有上下文所指示的含义。例如，该相对术语至少包括与特定值的测量相关的误差程度，与特定值相关的由制造，组装，使用造成的公差等。这种术语也应被视为公开了由两个端点的绝对值限定的范围。相对术语可指代所指示的值的一定百分比(例如1％，5％，10％或更多)的加或减。未采用相对术语的数值，也应该被揭示为具有公差的特定值。此外，“基本”在表达相对的角度位置关系时(例如，基本平行，基本垂直)，可指代在所指示的角度的基础上加或减一定度数(例如1度，5度，10度或更多)。
在本申请中，本领域普通技术人员将理解，由组件执行的功能可以为由一个组件，多个组件，一个零件，或多个零件执行。同样的，由零件执行的功能也可以由一个零件，一个组件，或多个零件组合来执行。
在本申请中，术语“上”、“下”、“左”、“右”、“前”、“后”等方位词是以附图所示的方位和位置关系来进行描述的，不应理解为对本申请实施例的限定。此外，在上下文中，还需要理解的是，当提到一个元件连接在另一个元件“上”或者“下”时，其不仅能够直接连接在另一个元件“上”或者“下”，也可以通过中间元件间接连接在另一个元件“上”或者“下”。还应当理解的，上侧、下侧、左侧、右侧、 前侧、后侧等方位词不仅代表正方位，也可以理解为侧方位。例如，下方可以包括正下方、左下方、右下方、前下方以及后下方等。
在本申请中，术语“控制器”、“处理器”、“中央处理器”、“CPU”、“MCU”可以互换。在使用单元“控制器”、“处理器”、“中央处理器”、“CPU”、或“MCU”来执行特定功能，除非另有说明，否则这些功能则可以由单个上述单元或多个上述单元来执行。
在本申请中，术语“装置”、“模块”或“单元”为了实现特定的功能，它们可以通过硬件或软件的形式来实现。
在本申请中，术语“计算”、“判断”、“控制”、“确定”、“识别”等指的是计算机系统或类似电子计算设备(例如，控制器，处理器等)的操作和过程。
下面结合附图和具体实施例对本申请的技术方案做具体的介绍。
图1示出了本申请中作为一种实施例的电动工具100。图1示出的电动工具100为台型工具，其他实施例中的电动工具也可以是手持式电动工具或其他形式的电动工具。
电动工具100具备一个主要功能和至少一个辅助功能。其中，主要功能为用户使用电动工具100的初衷，在多数情况下，主要功能依赖电机驱动实现，例如，主要功能可以为切割功能。而辅助功能可以为辅助主要功能的相关功能，或为与主要功能无关的次要功能，例如，辅助功能可以为显示功能，包括台锯模式指示灯的显示功能、斜锯调速界面的显示功能等。
参考图2，图2为图1示出的电动工具的电控原理图。电动工具200包括：电机10、供电管理装置20以及驱动装置30。其中，电机10可以与锯片等切割组件连接，运转后可以驱动诸如锯片等切割组件实现电动工具200的主要功能，一些示例中，电机10可以为无刷电机。供电管理装置20包括电源，至少能够为电机10供电，一些示例中，供电管理装置20可以包括电源、晶体管以及电源芯片等。驱动装置30与电机10连接，能够驱动电机10运转以实现电动工具200的主要功能，一些示例中，驱动装置30可以包括三相逆变电桥。
电动工具200还包括供用户操作以启用电动工具200的任意一个或多个功能的操作装置40，一些示例中，操作装置40可以包括机械开关、信号开关等。操作装置40与供电管理装置20连接，在用户操作启用电动工具200的任意一个或多个功能后，可以向供电管理装置20输出对应于用户所启用功能的功能信号。其中，对应于主要功能的功能信号为主要功能信号，对应于各个辅助功能的功能信号为辅助功能信号。一种情况下，用户通过操作装置40仅启用主要功能，操作装置40向供电管理装置20仅输出主要功能信号；另一情况下，用户启用任意一个或多个辅助功能，操作装置40输出分别对应于已启用的各个辅助 功能的辅助功能信号；其他情况下，用户既启用主要功能，又启用任意一个或多个辅助功能，操作装置40同时输出主要功能信号与对应的辅助功能信号。
而供电管理装置20能够接收来自操作装置40的功能信号，可以被设置为在接收到任一功能信号后，向后文即将描述的第一控制器50输出符合其电压要求的第一使能信号，如12V电压信号；以及在接收到主要功能信号后，向驱动装置30输出第三使能信号。一种情况下，供电管理装置20仅接收到主要功能信号，向第一控制器50输出第一使能信号并向驱动装置30输出第三使能信号；另一情况下，供电管理装置20接收到任意一个或多个辅助功能信号，向第一控制器50输出第一使能信号；其他情况下，供电管理装置20既接收到主要功能信号，又接收到任意一个或多个辅助功能信号，向第一控制器50输出第一使能信号并向驱动装置30输出第三使能信号。
电动工具200还包括控制实现主要功能的第一控制器50，一些示例中，第一控制器50可以包括诸如CPU、MCU等处理器以及存储有处理器可执行指令的存储器等。在一些实施例中，第一控制器50与供电管理装置20以及驱动装置30连接，能够接收来自供电管理装置20的第一使能信号，可以被设置为在至少接收到第一使能信号后，向驱动装置30输出第一驱动信号。另一些实施例中，第一控制器50还与操作装置40连接，操作装置40在用户操作启用主要功能后，还向第一控制器50输出主要功能信号，第一控制器50将在接收到第一使能信号且接收到主要功能信号后，向驱动装置30输出第一驱动信号。
而驱动装置30能够接收来自供电管理装置20的第三使能信号以及来自第一控制器50的第一驱动信号，可以被设置为在接收到第三使能信号且接收到第一驱动信号后，驱动电机10运作以实现电动工具200的主要功能；而在仅接收到第一驱动信号、未接收到第三使能信号的情况下，无法驱动电机10运转。
下面针对图2示出的电动工具200中的各个装置做更详细的说明。
参考图3，图3为图2示出的电动工具200中操作装置40的电路框图。在一个实施例中，操作装置40可以包括表征主要功能的开关41、表征第一辅助功能的开关42以及表征第二辅助功能的开关43。其中，A端与电源连接，当用户按下开关41时AB端接通，由B端可以得到主要功能信号；当用户按下开关42时AC端接通，由C端可以得到对应于第一辅助功能的辅助功能信号；当用户按下开关43时AD端接通，由D端可以得到对应于第二辅助功能的辅助功能信号；而当用户按下开关41、开关42或开关43中的任意一个或多个，由E端可以检测到用户至少启用了一个功能。
参考图4，图4为图2示出的电动工具200中供电管理装置20的电路框图。在一个实施例中，供电管理装置20可以包括电源(未示出)、第一晶体管组21、 第一电源芯片22以及第三晶体管组24。其中，第一晶体管组21与操作装置40、电源、第一电源芯片22连接，第一电源芯片22还与第三晶体管组24、第一控制器50连接，第三晶体管组24还与操作装置40、驱动装置30连接。
当用户启用主要功能，第一晶体管组21从操作装置40处得到主要功能信号后导通其与第一电源芯片22间的通路，第一电源芯片22继而向第三晶体管24和第一控制器50输出第一使能信号，第三晶体管24从第一电源芯片22处得到第一使能信号并从操作装置40处得到主要功能信号后，向驱动装置30输出第三使能信号。
当用户启用任意一个或多个辅助功能而未启用主要功能，第一晶体管组21从操作装置40处得到辅助功能信号后导通其与第一电源芯片22间的通路，第一电源芯片22继而向第三晶体管24和第一控制器50输出第一使能信号，而第三晶体管24未得到主要功能信号，无法向驱动装置30输出第三使能信号。
参考图5，图5为图2示出的电动工具200中驱动装置30的电路框图。在一个实施例中，驱动装置30可以包括驱动电路31以及驱动信号生成电路32。其中，驱动电路31与驱动信号生成电路32、第一控制器50连接，可以为由六个开关元件组成的三相逆变电桥，通过控制六个开关元件的通断能够控制电机10换相；驱动信号生成电路32还与供电管理装置20、第一控制器50连接，可以为自举电路，能够对接收到的信号进行升压处理。
而第一控制器50还可被配置为在至少接收到第一使能信号后，将用以控制驱动电路31中三个开关元件的第一驱动信号输出至驱动电路31，以及将用以控制驱动电路31中另外三个开关元件的第二驱动信号输出至驱动信号生成电路32。一些示例中，第一控制器50在包括处理器和存储器外，还包括功放电路，能够对待输出的第一驱动信号进行功率放大并向驱动电路31输出功率放大后的第一驱动信号。
驱动信号生成电路32接收来自第一控制器50的第二驱动信号以及来自供电管理装置20的第三使能信号，可以被配置为在接收到第二驱动信号且接收到第三使能信号后，对第二驱动信号进行升压处理并向驱动电路31输出升压处理后的第二驱动信号。
驱动电路31能够接收来自第一控制器50的第一驱动信号以及来自驱动信号生成电路32的第二驱动信号，可以被配置为在接收到第一驱动信号且接收到第二驱动信号后，驱动电机10运作以实现电动工具200的主要功能。
当用户启用主要功能，驱动信号生成电路32在接收来自供电管理装置20的第三使能信号以及来自第一控制器50的第二驱动信号后，向驱动电路31输出升压处理后的第二驱动信号，驱动电路31在接收来自第一控制器50的第一 驱动信号以及来自驱动信号生成电路32的第二驱动信号后，驱动电机10运转。
当用户启用任意一个或多个辅助功能而未启用主要功能，驱动信号生成电路32未接收到来自供电管理装置20的第三使能信号，无法向驱动电路31输出第二驱动信号，驱动电路31未接收到来自驱动信号生成电路32的第二驱动信号，无法驱动电机50运作。
参考图6，图6为图2示出的电动工具200中驱动装置30的另一电路框图。在另一实施例中，驱动装置30可以包括驱动电路31以及驱动集成芯片33。其中，驱动电路31与驱动集成芯片33连接；驱动集成芯片33还与供电管理装置20、第一控制器50连接。
而第一控制器50还可被配置为在至少接收到第一使能信号后，将用以控制驱动电路31的第一和/或第二驱动信号输出至驱动集成芯片33。驱动集成芯片33接收来自第一控制器50的驱动信号以及来自供电管理装置20的第三使能信号，可以被配置为在接收到驱动信号且接收到第三使能信号后，对驱动信号进行处理并向驱动电路31输出处理后的驱动信号。驱动电路31能够接收来自驱动集成芯片33的处理后的驱动信号，可以被配置为在接收到驱动信号后，驱动电机10运作以实现电动工具200的主要功能。
当用户启用主要功能，驱动集成芯片33在接收来自供电管理装置20的第三使能信号以及来自第一控制器50的驱动信号后，向驱动电路31输出处理后的驱动信号，驱动电路31在接收来自驱动集成芯片33的驱动信号后，驱动电机10运转。
当用户启用任意一个或多个辅助功能而未启用主要功能，驱动集成芯片33未接收到来自供电管理装置20的第三使能信号，无法向驱动电路31输出处理后的驱动信号，驱动电路31未接收到来自驱动集成芯片33的驱动信号，无法驱动电机10运作。
图2至图6描述的实施方式中，驱动电机正常工作至少需要两个驱动信号，第一驱动信号虽能在第一控制器上电后发出，但由供电管理装置发出的第三使能信号则独立依赖于用户操作，从而保证了启用辅助功能而未启用主要功能或第一控制器故障的情况下电机不会意外启动，满足产品安规，提升了工具的安全性与用户的使用体验。
此外，在另一些实施例中，电动工具200也可以仅具备主要功能，当用户启用电动工具200的主要功能，操作装置40向供电管理装置20输出主要功能信号，供电管理装置20在接收到主要功能信号后向第一控制器50输出第一使能信号并向驱动装置30输出第三使能信号，第一控制器50在至少接收到第一使能信号后向驱动装置30输出第一驱动信号，驱动装置30在接收到第三使能 信号且接收到第一驱动信号后驱动电机10运作以实现主要功能，从而使得第一控制器故障的情况下电动工具电机不会意外启动，能够保障用户安全，提升用户体验。
参考图7，图7为图1示出的电动工具的另一电控原理图。电动工具300在包括电机10、供电管理装置20、驱动装置30、驱动装置40以及第一控制器50外，还可以包括辅助装置60。其中，辅助装置60的数量可以与电动工具300的辅助功能的数量对应，即，各个辅助装置分别实现对应的辅助功能，一些示例中，辅助功能为显示功能，辅助装置可以为LED灯组或显示屏。
为了使电动工具的各个功能均能顺利实现且彼此且不产生干扰，在前文描述的电动工具200的基础上，操作装置40还可以向后文即将描述的第二控制器70输出对应于用户所启用功能的功能信号。供电管理装置20还可被设置为在接收到任一功能信号后，向第二控制器70输出符合其电压要求的第二使能信号，如3.3V电压信号。
电动工具300还包括控制实现辅助功能的第二控制器70，一些示例中，第二控制器70可以包括诸如CPU、MCU的处理器以及存储有处理器可执行指令的存储器。第二控制器70与操作装置10以及供电管理装置20连接，能够接收来自操作装置10的功能信号以及来自供电管理装置20的第二使能信号，可以被设置为在接收到第二使能信号且接收到辅助功能信号后，控制对应的辅助装置运行以实现对应的辅助功能。
在一个实施例中，电动工具300具备界面显示功能这一辅助功能，辅助装置包括对应于界面显示功能的界面显示装置61，用户通过操作装置40启用界面显示功能后，操作装置40向供电管理装置20以及第二控制器70输出对应于界面显示功能的第一辅助功能信号，供电管理装置20向第二控制器70输出第二使能信号，第二控制器70在接收到第二使能信号且接收到第一辅助功能信号后，点亮界面显示装置61并在第一预设时长T1后，熄灭界面显示装置61。
在另一实施例中，电动工具300在具备界面显示功能外，还具备另一辅助功能：电量显示功能，辅助装置在包括界面显示装置61外，还包括对应于电量显示功能的电量显示装置62，用户通过操作装置40同时启用电量显示功能和电量显示功能，操作装置40向供电管理装置20以及第二控制器70输出对应于界面显示功能的第一辅助功能信号以及对应于电量显示功能的第二辅助功能信号，供电管理装置20向第二控制器70输出第二使能信号，第二控制器70在接收到第二使能信号、第一辅助功能信号以及第二辅助功能信号后，点亮界面显示装置61并在第一预设时长T1后熄灭界面显示装置61，以及点亮电量显示装置62并在第二预设时长T2后熄灭电量显示装置62，举例来说，第一预设时长 T1可以为5min，第二预设时长T2可以为10s。
下面针对图7示出的电动工具300中的各个装置做更详细的说明。
参考图8，图8为图7示出的电动工具300中供电管理装置20的电路框图。在一个实施例中，供电管理装置20可以包括电源(未示出)、第一晶体管组21、第一电源芯片22、第二晶体管组23、第三晶体管组24以及第二电源芯片25。其中，第一晶体管组21与操作装置40、电源、第一电源芯片22连接，第一电源芯片22还与第二晶体管组23、第二电源芯片25连接，第二晶体管组23还与第一控制器50、第三晶体管组24连接，第三晶体管组24还与操作装置40、驱动装置30连接。
当用户启用主要功能，第一晶体管组21从操作装置40处得到主要功能信号后导通其与第一电源芯片22间的通路，第一电源芯片22继而导通其与第二电源芯片25以及与第二晶体管组23间的通路，第二电源芯片25继而向第二控制器70输出第二使能信号，第二晶体管组23继而向第一控制器50以及第三晶体管组24输出第一使能信号，第三晶体管组24从第二晶体管组22处得到第一使能信号并从操作装置40处得到主要功能信号后向驱动装置30输出第三使能信号。
当用户启用任意一个或多个辅助功能而未启用主要功能，第一晶体管组21从操作装置40处得到辅助功能信号后导通其与第一电源芯片22间的通路，第一电源芯片22继而导通其与第二电源芯片25以及与第二晶体管组23间的通路，第二电源芯片25继而向第二控制器70输出第二使能信号，第二晶体管组23继而向第一控制器50以及第三晶体管组24输出第一使能信号，而第三晶体管24未得到主要功能信号，无法向驱动装置30输出第三使能信号。
上述实施例中，第一电源芯片不再直接向第一控制器供电，而是由第一电源芯片引出第二晶体管组与第二电源芯片分别向第一、二控制器供电，从而使得第一、二控制器的供电流程能够彼此独立，第一控制器供电的中断不会干扰到第二控制器。
图7至图8描述的实施方式中，采用两个控制器分别负责电动工具的主要功能与辅助功能，响应于不同的功能信号，第一控制器与第二控制器能够彼此独立地控制电机与各个辅助装置实现对应的功能，二者互不干扰，进而保障了电动工具能够按照用户实际意图正常地工作。
参考图9，图9为图1示出的电动工具的又一电控原理图。电动工具400可以包括电机10、供电管理装置20、驱动装置30、驱动装置40、第一控制器50以及辅助装置60和第二控制器70。
考虑到电动工具主要功能的启停均依赖用户的操作，而辅助功能则是由用 户开启，默认时长后自行关闭，为了使得各功能的启停均能顺利实现，在前文描述的电动工具300的基础上，操作装置40还可以在用户关闭电动工具400的任意一个或多个功能后，中断向供电管理装置20以及第二控制器70输出对应于用户所关闭功能的功能信号。
而第二控制器70失去来自操作装置40的功能信号，可以被设置为在失去主要功能信号后，向供电管理装置20输出第一维持信号并在第三预设时长T3后中断第一维持信号的传输；以及在失去所有功能信号后，向供电管理装置20输出第二维持信号和第三维持信号，并在第四预设时长T4后中断第二维持信号的传输，在第五预设时长T5后中断第三维持信号的传输。
供电管理装置20失去来自操作装置40的功能信号，接收来自第二控制器70的维持信号，可以被设置为在失去主要功能信号、得到第一维持信号时继续第三使能信号的输出，第三预设时长T3后，在失去主要功能信号且失去第一维持信号后再中断向驱动装置30输出第三使能信号；在失去所有功能信号、得到第二维持信号时继续第一使能信号的输出，第四预设时长T4后，在失去所有功能信号且失去第二维持信号后再中断向第一控制器50输出第一使能信号；以及在失去所有功能信号、得到第三维持信号时继续第二使能信号的输出，第五预设时长T5后，在失去所有功能信号且失去第三维持信号后再中断向第二控制器70输出第二使能信号。
其中，第三预设时长T3小于或等于第四预设时长T4，第四预设时长T4小于或等于第五预设时长T5，例如，第三预设时长T3与第四预设时长T4可以为10s，第五预设时长T5可以为5min。此外，第五预设时长T5大于或等于各个辅助装置实现对应辅助功能的耗时，以使辅助功能得以在设备断电前执行完毕，例如，界面显示装置61实现界面显示功能的第一预设时长T1为5min，电量显示装置62实现电量显示功能的第二预设时长T2为10s，第五预设时长T5可为5min。
下面针对图9示出的电动工具400中的各个装置做更详细的说明。
参考图10，图10为图9示出的电动工具400中供电管理装置20的电路框图。在一个实施例中，供电管理装置20可以包括电源(未示出)、第一晶体管组21、第一电源芯片22、第二晶体管组23、第三晶体管组24以及第二电源芯片25。其中，第一晶体管组21与操作装置40、电源、第一电源芯片22以及第二控制器70连接，第一电源芯片22还与第二晶体管组23、第二电源芯片25连接，第二晶体管组23还与第一控制器50、第三晶体管组24以及第二控制器70连接，第三晶体管组24还与操作装置40、驱动装置30以及第二控制器70连接。
以第三预设时长T3和第四预设时长T4是10s、第五预设时长T5是5min 为例。当用户仅关闭主要功能，第三晶体管组24在失去主要功能信号时得到第一维持信号，可以继续第三使能信号的输出，直至10s后失去第一维持信号，中断向驱动装置30输出第三使能信号，从而使得电机10在用户关闭主要功能10s后停转。
当用户仅关闭辅助功能，第一使能信号、第二使能信号以及第三使能信号的输出不受影响，针对已接收过的辅助功能信号，第二控制器70仍可按照各个辅助功能所要求的对应时长控制实现对应的辅助功能。
当用户关闭所有功能，除了前文描述的第三晶体管组在10s后中断第三使能信号的输出以使电机10停机外，第二晶体管组23在失去所有功能信号时得到第二维持信号，可以继续第一使能信号的输出，直至10s后失去第二维持信号，中断向第一控制器50输出第一使能信号，从而使得第一控制器50在用户关闭所有功能10s后断电。同时，第一晶体管组21在失去所有功能信号时得到第三维持信号，可以继续导通其与第一电源芯片22、第二电源芯片25间的通路，保持第二使能信号的输出，直至5min后失去第三维持信号，断开其与第一电源芯片22、第二电源芯片25间的通路，第二电源芯片25中断向第二控制器70输出第二使能信号，从而使得第二控制器70在用户关闭所有功能5min后断电，在这5min内针对已接收过的各个辅助功能信号，第二控制器70仍可按照各个辅助功能所要求的时长控制实现对应的辅助功能。
图9至图10描述的实施方式中，第二控制器基于用户所关闭的功能按对应的预设时长向供电管理装置输出对应的维持信号，供电管理装置结合功能信号与维持信号确定是否中断使能信号及驱动信号的输出，以保障第一、二控制器能够互不干扰地顺利执行完各项功能，且在功能执行完毕后也可及时断电，满足产品安规，提升了工具的安全性与用户的使用体验。
图11示出了本申请中作为一种实施例的电动工具的控制方法。图11示出的控制方法可以应用于前文描述的电动工具中。
电动工具的控制方法，可以包括如下具体步骤：
S1102，在用户启用电动工具的一个或多个功能时，操作装置向供电管理装置输出对应于用户所启用功能的功能信号；
S1104，供电管理装置在接收到任一功能信号时，向第一控制器输出第一使能信号，以及在接收到对应于主要功能的主要功能信号时，向驱动装置输出第三使能信号；
S1106，第一控制器在至少接收到第一使能信号时，向驱动装置输出第一驱动信号；
S1108，驱动装置在接收到第三使能信号且接收到第一驱动信号时，驱动电机运作以实现主要功能。
图12示出了本申请中作为另一实施例的电动工具500，图12示出的电动工具500为直流电钻，其他实施例中的电动工具也可以是钉枪、电圆锯等其他类型的手持式电动工具，或者台锯、斜锯等台型工具。
参考图13，图13为图12示出的电动工具500的电控原理图。电动工具500包括：电机510、供电管理装置520以及驱动装置530。其中，电机510的电机轴能够在转动后直接或通过传动组件间接地驱动输出轴转动，从而使输出轴驱动与其相连的诸如钻头、锯片等装配件执行紧固、切割等作业，一些示例中，电机510可以为直流无刷电机。供电管理装置520包括电源，并能够至少为电机510供电，一些示例中，供电管理装置520可以包括可拆卸的电池包等电源、以及可集成的电源芯片、晶体管和电阻、电容、电感等元器件。驱动装置530与电机510相连，能够驱动电机510运转以进行紧固、切割等作业，一些示例中，驱动装置530可以包括三相逆变电桥、驱动芯片等。
电动工具500还包括供用户操作以切换电动工具500的开关状态的操作装置540，一些示例中，操作装置540可以包括机械开关、信号开关等。操作装置540与供电管理装置520相连，且与后文即将描述的第一控制器550以及第二控制器560相连。在用户启用电动工具500时，操作装置540可以向第一控制器550以及第二控制器560输出表征启用电动工具的开启信号。而在用户停止使用电动工具500时，操作装置540可以向第一控制器550以及第二控制器560输出表征停用电动工具的关闭信号。一些示例中，开启信号和关闭信号可以为电压信号或电压跳变信号，例如，高压信号为开启信号，低压信号为关闭信号，另一些示例中，开启信号和关闭信号也可以为携带有具体信息的格式更为复杂的数字信号等。
电动工具500还包括第一控制器550和第二控制器560，一些示例中，第一控制器550可以包括诸如CPU(Central Processing Unit，中央处理单元)、MCU(Microcontroller Unit，微控制单元)等处理器以及存储有处理器可执行指令的存储器，第二控制器560亦然。
第一控制器550与驱动装置530以及操作装置540相连，能够接收来自操作装置540的开启信号。第一控制器550可被设置为在接收到开启信号时，向驱动装置530输出驱动信号。具体地，驱动信号为驱动装置530的控制信号，其用于控制驱动装置530正常工作。
第二控制器560与驱动装置530以及操作装置540相连，能够接收来自操 作装置540的开启信号。第二控制器560可被设置为在接收到开启信号时，向驱动装置530输出驱动使能信号。具体地，驱动使能信号为驱动装置530的供电信号或激活信号，其用于为驱动装置530提供电能或激活导通驱动装置530中的元器件。
而驱动装置530与电机510、第一控制器550以及第二控制器560相连，能够接收来自第一控制器550的驱动信号以及接收来自第二控制器560的驱动使能信号。驱动装置530可被设置为在接收到驱动信号且接收到驱动使能信号时，驱动电机510运转；而在仅接收到驱动信号、未接收到驱动使能信号的情况下，或在仅接收到驱动使能信号、未接收到驱动信号的情况下，无法驱动电机510运转。
下面针对图13示出的电动工具500中的各个装置做更详细的说明。
参考图14，一些实施例中，驱动装置530可为由多个半导体开关元件组成的驱动电路，在电机510为三相电机的情况下，驱动电路可由六个半导体开关元件组成。第一控制器550输出的驱动信号将传输至驱动装置530中的各个半导体开关元件以改变各个半导体开关元件的通断状态，继而改变施加在电机510各绕组上的电压状态或电流状态，从而控制电机510进行换相。而第二控制器560输出的驱动使能信号也将传输至驱动装置530以进行供电或导通其中的元器件，以使基于上述驱动信号所进行的电机控制具备能量基础或能够被顺利激活。如图14、图15所示，电机510为三相电机，驱动装置530中关于U相的部分驱动电路可以包括多个晶体管Q11、Q12，多个电阻以及整流二极管等，一些示例中，驱动电路中的晶体管Q11、Q12也可以使用诸如光耦等其他半导体元器件进行替代。其中，晶体管Q11的输入信号为驱动使能信号PWM_EN，晶体管Q12的输入信号为驱动信号ULO，接入驱动使能信号PWM_EN后，Q11、Q12得以导通，晶体管Q12的输出信号ULO’因而可以输出至半导体开关元件。
在一些实施例中，操作装置540可为拨动式开关，在被拨至开启状态对应位置时可以输出开启信号，而在被拨至关闭状态对应位置时则可输出关闭信号。另一些实施例中，操作装置540可为点触式开关，在电动工具500由关闭状态切换为开启状态时，点触式开关被按压，开关触点短暂接触后再分离，该情况下产生的跳变信号即为开启信号，例如，开启信号可以为高压变为低压的跳变信号。在电动工具100由开启状态切换为关闭状态时，点触式开关再次被按压，开关触点再次短暂接触后分离，该情况下产生的跳变信号即为关闭信号。而其他时段内，点触式开关未被按压，开关触点不接触，可以持续向外输出稳定的非跳变信号，例如，可以持续输出高压信号。
图13至图15描述的电动工具500中，驱动电机正常运行同时需要由第一 控制器提供的起控制作用的驱动信号、以及由第二控制器提供的起使能作用的驱动使能信号，双控制器均响应开启信号进行信号输出，无论双控制器中的任一方故障均无法驱动电机运行，从而为电机正常运行提供了双重保障，不会发生意外启动的问题，提升了工具的安全性及用户的使用体验。
在一些实施例中，第一控制器550还可以被设置为在接收到来自操作装置540的关闭信号时，停止向驱动装置530输出驱动信号。而驱动装置530在失去驱动信号后将无法驱动电机510运行，电机510因而停转。另一些实施例中，除第一控制器550停止向驱动装置530输出驱动信号外，第二控制器560也可以被设置为在接收到来自操作装置540的关闭信号时，停止向驱动装置530输出驱动使能信号。而驱动装置530在失去驱动信号且失去驱动使能信号后将无法驱动电机510运行，电机510因而停转。该实施例中，双控制器均响应关闭信号停止信号输出，在双控制器未产生故障的情况下，能够保障电机顺利停转。
参考图16，图16为本申请中作为另一实施例的电动工具600的电控原理图。电动工具600包括电机610、供电管理装置620、驱动装置630、操作装置640以及第一控制器650和第二控制器660。电动工具600可以根据需求部分或全部地引用电动工具500中电机510、供电管理装置520、驱动装置530、操作装置540以及第一控制器550和第二控制器560的元器件构成及设置方式，在电动工具500的基础上，电动工具600与电动工具500的区别至少在于，电动工具600中第一控制器650的电能由供电管理装置620提供，供电管理装置620的供电过程受第一控制器650控制，电动工具600能够实现延时关机功能。
电动工具600中，供电管理装置620与操作装置640以及第一控制器650相连。供电管理装置620能够接收来自操作装置640的开启信号，可以被设置为在接收到来自操作装置640的开启信号时，向第一控制器650输出第一使能信号，以使第一控制器650获得供电。所述第一使能信号为第一控制器650的供电信号，可以为符合其电压要求的电压信号。一些实施例中，供电管理装置620还与第二控制器660相连，在接收到开启信号时，除了向第一控制器650输出第一使能信号外，还可被设置为向第二控制器660输出第二使能信号，以使第二控制器660获得供电。所述第二使能信号为第二控制器660的供电信号，可以为符合其电压要求的电压信号。第一使能信号与第二使能信号的压值可以相同，也可以不同，例如，第一使能信号可以为12V电压信号，第二使能信号可以为3.3V信号。可以理解的是，其他实施例中，第一控制器650与第二控制器660的供电逻辑也可以是彼此独立的。
而第一控制器650还可以被设置为在接收到来自操作装置640的关闭信号时，等待第六预设时长T6后向供电管理装置620输出第一断电信号，第一断电信号可为电压信号。一些实施例中，第一控制器650也可被设置为在接收到来 自操作装置640的关闭信号时，向供电管理装置620输出第一断电信号，即第六预设时长为零。供电管理装置620则可被设置为在接收到第一断电信号时，停止向第一控制器650输出第一使能信号。一些实施例中，在接收到第一断电信号时，供电管理装置620除了停止向第一控制器650输出第一使能信号外，还可被设置为停止向第二控制器660输出第二使能信号。可以理解的是，其他实施例中，第一控制器650与第二控制器660的断电逻辑也可以是彼此独立的。
下面针对图16示出的电动工具600中的各个装置做更详细的说明。
在一些实施例中，操作装置640为点触式开关，开关触点在短暂接触后分离，无法形成持续的电路回路，供电管理装置620因而无法得到持续的开启信号，可能会在上电后随着开启信号的失去而掉电，只能向外短暂供电。为使供电管理装置620在上电后能够持续向外供电，第一控制器650还可以被设置为在接收到来自操作装置640的开启信号时，向供电管理装置620输出维持信号，以使供电管理装置620在失去开启信号时能够继续向外供电，维持信号可为电压信号。供电管理装置620则可被设置为在失去来自操作装置640的开启信号，但接收到来自第一控制器650的维持信号时，继续向第一控制器650输出第一使能信号，一些实施例中，也继续向第二控制器660输出第二使能信号。
第一控制器650还可以被设置为在接收到来自操作装置640的关闭信号时，停止向供电管理装置620输出维持信号，以使供电管理装置620不再向外供电。供电管理装置620则可被设置为在失去开启信号且失去维持信号时，停止向第一控制器650输出第一使能信号，一些实施例中，也停止向第二控制器660输出第二使能信号。此时，第一控制器650不再向供电管理装置620输出维持信号即可视为向供电管理装置620输出第一断电信号。
参考图17，操作装置640为点触式开关，供电管理装置620中的部分供电电路可以包括多个晶体管Q21、Q22、Q23，多个电阻、电容以及稳压二极管，一些示例中，供电电路中的晶体管Q21、Q22、Q23也可以使用诸如光耦等其他半导体元器件进行替代。其中，晶体管Q23的输入信号可接入来自第一控制器650的维持信号Powerkeep。在操作装置640中的开关触点接触时，晶体管Q21被短路，晶体管Q22得到导通，供电管理装置620上电成功，Q22产生输出信号，其通过电压转换等处理后可用作第一使能信号，一些实施例中，也可用作第二使能信号。而在操作装置640中的开关触点分离后，Q21不再导通，Q22亦未导通，为使供电管理装置620能够保持供电状态，第一控制器650接收开启信号并输出维持信号Powerkeep，维持信号Powekeep将使Q23导通，而Q23的输出信号可使Q21、Q22继续导通，Q22可继续输出信号，第一使能信号因而得以继续输出至第一控制器650，一些实施例中，第二使能信号也继续输出至第二控制器660。
在第一控制器650未发生故障的情况下，当第一控制器650接收到关闭信号并等待第六预设时长T6后，其不再输出维持信号Powerkeep，Q23不再导通，Q21、Q22亦不再导通，Q22不再输出信号，向第一控制器650输出的第一使能信号因而中断，一些实施例中，向第二控制器660输出的第二使能信号也中断。
图16至图17描述的电动工具600中，第一控制器和第二控制器的电能源自供电管理装置输出的使能信号，第一控制器将在接收到关闭信号时，等待预设时长后设法中断供电管理装置的供电。在第一控制器未产生故障的情况下，能够安全实现电动工具延时关机的功能，在电机停转而整机未掉电的待机状态下，双控制器可以对用户操作进行快速响应或控制实现照明、显示等辅助功能，直至最终关机。
参考图18，图18为本申请中作为又一实施例的电动工具700的电控原理图。电动工具700在包括电机710、供电管理装置720、驱动装置730、操作装置740以及第一控制器750和第二控制器760之外，还包括参数检测装置770。电动工具700可以根据需求部分或全部地引用电动工具600中电机610、供电管理装置620、驱动装置630、操作装置640以及第一控制器650和第二控制器660的元器件构成及设置方式，在电动工具600的基础上，电动工具700与电动工具600的区别至少在于，电动工具700中供电管理装置720的供电过程在受第一控制器750控制之外，还受第二控制器760控制，能够在第一控制器750故障的情况下安全关机。
电动工具700中，参数检测装置770与电机710以及第二控制器760相连。参数检测装置770能够对诸如相电流、相电压、转子位置、电机转速等电机运行参数进行检测，可以被设置为检测电机710的运行参数并将运行参数传输至第二控制器760。一些示例中，参数检测装置770可以为各类传感器。
第二控制器760还与供电管理装置720相连。第二控制器760还被设置为在接收到来自操作装置740的关闭信号后，等待第七预设时长T7，确定来自参数检测装置770的运行参数是否仍处于变化状态下，第七预设时长T7可以小于或等于第六预设时长T6。关闭信号发出并经过第七预设时长T7后，在第一控制器750未故障情况下，其已停止向驱动装置730输出驱动信号，驱动装置730已停止驱动电机710运行，电机710的运行参数应当处于不变化的状态，因而若第二控制器760确定来自参数检测装置770的电机运行参数未处于变化状态下，可以不动作，等待第六预设时长T6耗尽后自然关机即可。
而在电机运行参数处于变化状态的情况下，第一控制器750可能存在软件故障等问题，第一控制器750仍向驱动装置730输出驱动信号，驱动装置730仍在驱动电机710运行，此情况下，第二控制器760可以被设置为向供电管理 装置720输出第二断电信号，第二断电信号可为电压信号。供电管理装置720则可被设置为在接收到来自第二控制器760的第二断电信号时，停止向第一控制器750输出所述第一使能信号。第一控制器750在失去来自供电管理装置720的第一使能信号时将停止向驱动装置730输出驱动信号，而驱动装置730在失去驱动信号后将无法驱动电机710运行，电机710因而停转。一些实施例中，在接收到来自第二断电信号时，除了停止向第一控制器750输出第一使能信号，供电管理装置720还可被设置为停止向第二控制器760输出第二使能信号，以使整机断电。
此外，考虑到驱动装置730中的晶体管在得到来自第一控制器750的驱动信号，但未得到来自第二控制器760的驱动使能信号的情况下，可能会出现晶体管损坏等情况，一些实施例中，第二控制器760可以在接收到关闭信号时不停止驱动使能信号的输出，而设置为在接收到关闭信号并经历第七预设时长T7后，停止向驱动装置730输出驱动使能信号，从而避免上述晶体管损坏的问题。
下面对图18所示的电动工具700中的各个装置做更详细的说明。
参考图19，一些实施例中，操作装置740为点触式开关，供电管理装置720中的部分供电电路可以包括多个晶体管Q31、Q32、Q33，多个电阻、电容以及稳压二极管，一些示例中，驱动电路中的晶体管Q31、Q32、Q33也可以使用诸如光耦等其他半导体元器件进行替代。其中，晶体管Q31的输入信号可接入来自第二控制器760的第二断电信号Poweroff，晶体管Q33的输入信号可接入来自第一控制器750的维持信号Powerkeep。在电动工具700处于开启状态时，第一控制器750输出的维持信号Powekeep使得Q33导通，Q31、Q32亦导通，Q32输出的信号经电压转换等处理后用作第一使能信号。
在第一控制器750发生故障的情况下，第一控制器750接收到关闭信号时无法停止驱动信号的输出，驱动装置730仍驱动电机710运行，参数检测装置770将变化状态的电机运行参数传输至第二控制器760。第二控制器760在接收到关闭信号的第七预设时长T7后，确定当前电机运行参数处于变化状态，输出第二断电信号Poweroff，第二断电信号Poweroff将使Q21断开，Q22亦断开，Q22不再输出信号，向第一控制器750输出的第一使能信号因而中断，第一控制器750因失去供电而无法向驱动装置730输出驱动信号，驱动装置730因失去驱动信号而停止驱动电机710，电机710停转。一些实施例，Q22不再输出信号，向第二控制器760输出的第二使能信号也中断，整机掉电。
图18至图19描述的电动工具700中，第二控制器通过电机运行参数的状态确认电机是否仍在运行，即，确认第一控制器是否故障，并在参数变化(第一控制器故障)的情况下设法中断供电管理装置向第一控制器的供电，以使第 一控制器掉电并停止驱动信号的输出，从而在第一控制器产生故障的情况下，顺利实现电机停转或进一步实现关机，只要双控制器中仍有一个控制器可以正常工作就不会发生无法关闭的问题，提升了工具的安全性及用户的使用体验。
图20示出了本申请中作为一个实施例的电动工具的控制方法的流程图。图20示出的控制方法可以应用于前文描述的电动工具中。
该电动工具的控制方法，可以包括如下具体步骤：
S2002，在电动工具被切换为开启状态时，操作装置向第一控制器以及第二控制器输出开启信号；
S2004，第一控制器在接收到开启信号时，向驱动装置输出驱动信号；
S2006，第二控制器在接收到开启信号时，向驱动装置输出驱动使能信号；
S2008，驱动装置在接收到驱动信号且接收到驱动使能信号时，驱动电机运行。
以上显示和描述了本申请的基本原理、主要特征和优点。本行业的技术人员应该了解，上述实施例不以任何形式限制本申请，凡采用等同替换或等效变换的方式所获得的技术方案，均落在本申请的保护范围内。

Claims (20)

  1. 一种电动工具，包括：
    电机；
    供电管理装置，包括电源并设置为至少为所述电机供电；
    驱动装置，设置为驱动所述电机运行以实现所述电动工具的主要功能；
    操作装置，设置为供用户操作以启用所述电动工具的一个或多个功能，并向所述供电管理装置输出对应于用户所启用功能的功能信号；所述电动工具具备所述主要功能以及至少一个辅助功能，所述功能信号包括对应于所述主要功能的主要功能信号与对应于各个所述辅助功能的辅助功能信号；
    其中，所述供电管理装置还被设置为在接收到任一所述功能信号时，输出第一使能信号，以及在接收到所述主要功能信号时，向所述驱动装置输出第三使能信号；
    所述电动工具还包括：
    第一控制器，与所述供电管理装置连接并设置为在至少接收到所述第一使能信号时，向所述驱动装置输出第一驱动信号；
    所述驱动装置，还被设置为在接收到所述第三使能信号且接收到所述第一驱动信号时，驱动所述电机运作。
  2. 根据权利要求1所述的电动工具，其中，所述操作装置还被设置为在用户启用所述主要功能时，向所述第一控制器输出所述主要功能信号；所述第一控制器，还与所述操作装置连接，还被设置为在接收到所述第一使能信号且接收到所述主要功能信号时，向所述驱动装置输出第一驱动信号。
  3. 根据权利要求1所述的电动工具，其中，所述驱动装置包括驱动电路与驱动信号生成电路；所述第一控制器，还被设置为在至少接收到所述第一使能信号时，向所述驱动电路输出所述第一驱动信号，以及向所述驱动信号生成电路输出第二驱动信号；所述驱动信号生成电路，设置为在接收到所述第三使能信号且接收到所述第二驱动信号时，向所述驱动电路输出升压处理后的所述第二驱动信号；所述驱动电路，设置为在接收到所述第一驱动信号且接收到所述升压处理后的所述第二驱动信号时，驱动所述电机运作。
  4. 根据权利要求1所述的电动工具，其中，所述电动工具还包括：
    辅助装置，设置为实现所述电动工具的辅助功能；
    第二控制器，与所述操作装置连接且与所述供电管理装置连接；
    所述操作装置还被设置为向所述第二控制器输出对应于用户所启用功能的所述功能信号；所述供电管理装置，还被设置为在接收到任一所述功能信号时， 向所述第二控制器输出第二使能信号；所述第二控制器，设置为在接收到所述第二使能信号且接收到对应于任一所述辅助功能的辅助功能信号时，控制对应的所述辅助装置运行以实现对应的所述辅助功能。
  5. 根据权利要求4所述的电动工具，其中，所述辅助功能包括界面显示功能，所述辅助装置包括对应于所述界面显示功能的界面显示装置；所述第二控制器，还被设置为在接收到所述第二使能信号且接收到对应于所述界面显示功能的所述辅助功能信号时，点亮所述界面显示装置并在第一预设时长后熄灭所述界面显示装置。
  6. 根据权利要求4所述的电动工具，其中，所述辅助功能包括电量显示功能，所述辅助装置包括对应于所述电量显示功能的电量显示装置；所述第二控制器，还被设置为在接收到所述第二使能信号且接收到对应于所述电量显示功能的所述辅助功能信号时，点亮所述电量显示装置并在第二预设时长后熄灭所述电量显示装置。
  7. 根据权利要求4所述的电动工具，其中，所述操作装置还被设置为供用户操作以关闭所述电动工具的一个或多个功能，并中断向所述第二控制器与所述供电管理装置输出对应于用户所关闭功能的所述功能信号。
  8. 根据权利要求7所述的电动工具，其中，所述第二控制器还被设置为在失去所述主要功能信号时，向所述供电管理装置输出第一维持信号并在第三预设时长后中断所述第一维持信号的传输；所述供电管理装置，还被设置为在失去所述主要功能信号且失去所述第一维持信号时，中断向所述驱动装置输出所述第三使能信号。
  9. 根据权利要求8所述的电动工具，其中，所述第二控制器还被设置为在失去所有所述功能信号时，向所述供电管理装置输出第二维持信号并在第四预设时长后中断所述第二维持信号的传输；所述第四预设时长大于或等于所述第三预设时长；所述供电管理装置，还被设置为在失去所有所述功能信号且失去所述第二维持信号时，中断向所述第一控制器输出所述第一使能信号。
  10. 根据权利要求9所述的电动工具，其中，所述第二控制器还被设置为在失去所有所述功能信号时，还向所述供电管理装置输出第三维持信号并在第五预设时长后中断所述第三维持信号的传输；所述第五预设时长大于或等于所述第四预设时长；所述供电管理装置，还被设置为在失去所有所述功能信号且失去所述第三维持信号时，中断向所述第二控制器输出所述第二使能信号。
  11. 一种电动工具，包括：
    电机；
    供电管理装置，包括电源并设置为至少为所述电机供电；
    驱动装置，设置为驱动所述电机运行以实现所述电动工具的主要功能；
    操作装置，设置为供用户操作以启用所述主要功能，并向所述供电管理装置输出对应于所述主要功能的主要功能信号；
    其中，所述供电管理装置还被设置为在接收到所述主要功能信号时，输出第一使能信号，以及向所述驱动装置输出第三使能信号；
    所述电动工具还包括：
    第一控制器，与所述供电管理装置连接并设置为在至少接收到所述第一使能信号时，向所述驱动装置输出第一驱动信号；
    所述驱动装置，还被设置为在接收到所述第三使能信号且接收到所述第一驱动信号时，驱动所述电机运作。
  12. 一种电动工具，包括：
    电机；
    供电管理装置，包括电源并设置为至少向所述电机供电；
    驱动装置，设置为驱动所述电机运行；
    操作装置，设置为供用户操作以切换所述电动工具的开关状态，并输出对应的开启信号或关闭信号；
    其中，所述电动工具还包括：
    第一控制器，与所述操作装置以及所述驱动装置连接，并设置为在接收到所述开启信号时，向所述驱动装置输出驱动信号；
    第二控制器，与所述操作装置以及所述驱动装置连接，并设置为在接收到所述开启信号时，向所述驱动装置输出驱动使能信号；
    所述驱动装置，还被设置为在接收到所述驱动信号且接收到所述驱动使能信号时，驱动所述电机运行。
  13. 根据权利要求12所述的电动工具，其中，所述第一控制器还被设置为在接收到所述关闭信号时，停止向所述驱动装置输出所述驱动信号。
  14. 根据权利要求12所述的电动工具，其中，所述供电管理装置与所述第一控制器连接，所述供电管理装置还被设置为在接收到所述开启信号时，向所述第一控制器输出第一使能信号。
  15. 根据权利要求14所述的电动工具，其中，所述第一控制器还被设置为在接收到所述关闭信号时，等待第六预设时长后向所述供电管理装置输出第一 断电信号；所述供电管理装置还被设置为在接收到所述第一断电信号时，停止向所述第一控制器输出所述第一使能信号。
  16. 根据权利要求14所述的电动工具，其中，所述第一控制器还被设置为在接收到所述开启信号时，向所述供电管理装置输出维持信号；所述供电管理装置还被设置为在失去所述开启信号而接收到所述维持信号时，继续向所述第一控制器输出所述第一使能信号。
  17. 根据权利要求16所述的电动工具，其中，所述第一控制器还被设置为在接收到所述关闭信号时，等待第六预设时长后停止向所述供电管理装置输出维持信号；所述供电管理装置还被设置为在失去所述维持信号时，停止向所述第一控制器输出所述第一使能信号。
  18. 根据权利要求15或17所述的电动工具，其中，所述电动工具还包括：参数检测装置，与所述电机以及所述第二控制器连接，并设置为检测所述电机的运行参数，并将所述电机的所述运行参数传输至所述第二控制器；所述第二控制器还被设置为在接收到所述关闭信号并经历第七预设时长后，在所述运行参数仍处于变化状态的情况下，向所述供电管理装置输出第二断电信号；所述供电管理装置还被设置为在接收到所述第二断电信号时，停止向所述第一控制器输出所述第一使能信号。
  19. 根据权利要求18所述的电动工具，其中，所述第二控制器还被设置为在接收到所述关闭信号并经历第七预设时长后，停止向所述驱动装置输出所述驱动使能信号。
  20. 根据权利要求18所述的电动工具，其中，所述第一控制器还被设置为在失去所述第一使能信号时，停止向所述驱动装置输出所述驱动信号。
PCT/CN2024/092804 2023-06-02 2024-05-13 电动工具 Ceased WO2024244952A1 (zh)

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