CN220692995U

CN220692995U - H-bridge mutual exclusion driving circuit

Info

Publication number: CN220692995U
Application number: CN202321880116.XU
Authority: CN
Inventors: 杨永佳; 刘勇超; 李森; 计雪峰; 于士友
Original assignee: QINGDAO HARDHITTER ELECTRIC CO Ltd
Current assignee: QINGDAO HARDHITTER ELECTRIC CO Ltd
Priority date: 2023-07-17
Filing date: 2023-07-17
Publication date: 2024-03-29
Anticipated expiration: 2033-07-17

Abstract

The application provides an H bridge mutually exclusive driving circuit, include: the first switching tube is grounded through the second switching tube, the fourth switching tube is grounded through the third switching tube, the public end of the first switching tube and the second switching tube is connected with the cathode of the target motor, and the public end of the third switching tube and the fourth switching tube is connected with the anode of the target motor. The two input ends of the forward rotation driving module are respectively connected with a first driving signal and a second driving signal, and the output end of the forward rotation driving module is connected with the base electrode of the second switching tube. The two input ends of the inversion driving module are respectively connected with a first driving signal and a second driving signal, and the output end of the inversion driving module is connected with the base electrode of the third switching tube. Therefore, only a small number of elements are used for forming two driving modules to control the current direction flowing through the target motor, so that the forward or reverse operation of the target motor is realized, the whole circuit is simplified, and the cost required by the circuit is reduced.

Description

H-bridge mutual exclusion driving circuit

Technical Field

The application relates to the technical field of electronic circuits, in particular to an H-bridge mutual exclusion driving circuit.

Background

An H-bridge circuit is a circuit commonly used in dc motor drives to invert/reverse the voltage across a connected load or output. The main principle is that the current flow direction is changed by controlling the control signals of the four control elements, so that the voltage polarity is changed.

The circuit can control the direction of current in the circuit, so that the output voltage and current achieve the maximum effect, and therefore, the circuit is widely applied to various direct current motor drives. For example, in robots, electronic devices, electronic toys, and the like in industrial production, and in experiments of some electronic lovers, H-bridge circuits are also widely used in various controllers and the like.

However, the existing H-bridge mutual exclusion driving circuit has a relatively complex structure, needs to use a decoder chip to complete signal hardware mutual exclusion, or uses a large number of operational amplifiers and comparator circuits to form mutual exclusion, and has the advantages of more elements, more port occupation and higher cost.

Disclosure of Invention

In view of this, the present application provides an H-bridge mutual exclusion driving circuit, which aims to use fewer components to form the H-bridge mutual exclusion driving circuit, so as to reduce the required cost of the circuit.

The application provides an H bridge mutually exclusive driving circuit, this circuit includes: the device comprises a forward rotation driving module, a reverse rotation driving module, a first switching tube, a second switching tube, a third switching tube and a fourth switching tube;

the first switch tube is grounded through the second switch tube, the fourth switch tube is grounded through the third switch tube, the common end of the first switch tube and the second switch tube is connected with the negative electrode of the target motor, and the common end of the third switch tube and the fourth switch tube is connected with the positive electrode of the target motor;

the two input ends of the forward rotation driving module are respectively connected with a first driving signal and a second driving signal, and the output end of the forward rotation driving module is connected with the base electrode of the second switching tube;

the two input ends of the inversion driving module are respectively connected with the first driving signal and the second driving signal, and the output end of the inversion driving module is connected with the base electrode of the third switching tube.

Optionally, a collector of the first switching tube is connected with a cathode of the target motor, an emitter of the first switching tube is connected with a first power supply, and a base of the first switching tube is connected with an anode of the target motor;

and the emitter of the third switching tube is grounded, and the collector of the third switching tube is connected with the positive electrode of the target motor.

Optionally, an emitter of the second switching tube is grounded, and a collector of the second switching tube is connected with a cathode of the target motor;

the collector of the fourth switching tube is connected with the positive electrode of the target motor, the emitter of the fourth switching tube is connected with the first power supply, and the base of the fourth switching tube is connected with the negative electrode of the target motor.

Optionally, a first resistor is further connected between the base electrode and the emitter electrode of the second switching tube;

and a second resistor is also connected between the base electrode and the emitter electrode of the third switching tube.

Optionally, the forward rotation driving module comprises a fifth switching tube;

the emitter of the fifth switching tube is used for being connected with the first driving signal, the base electrode of the fifth switching tube is used for being connected with a second power supply and the second driving signal, and the collector of the fifth switching tube is used for being connected with the base electrode of the second switching tube.

Optionally, the inversion driving module includes a sixth switching tube;

the emitter of the sixth switching tube is used for being connected with the second driving signal, the base electrode of the sixth switching tube is used for being connected with the second power supply and the first driving signal, and the collector of the sixth switching tube is used for being connected with the base electrode of the third switching tube.

Optionally, the forward rotation driving module further includes a third resistor, and the base electrode of the fifth switching tube is connected to the second driving signal through the third resistor;

the inversion driving module further comprises a fourth resistor, and the base electrode of the sixth switching tube is connected with the first driving signal through the fourth resistor.

Optionally, the fifth switching tube is connected to the second power supply through a fifth resistor, and the sixth switching tube is connected to the second power supply through a sixth resistor.

Optionally, the inversion driving module includes a first optocoupler;

the first optocoupler comprises a first pin, a second pin, a third pin and a fourth pin, wherein the first pin is used for being connected with a second power supply, the second pin is used for being connected with a first driving signal, the third pin is used for being connected with a base electrode of the third switching tube, and the fourth pin is used for being connected with a second driving signal.

Optionally, the forward rotation driving module comprises a second optocoupler;

the second optocoupler comprises a fifth pin, a sixth pin, a seventh pin and an eighth pin, wherein the fifth pin is used for being connected with a second power supply, the sixth pin is used for receiving the second driving signal, the seventh pin is used for being connected with a base electrode of the second switching tube, and the eighth pin is used for being connected with the first driving signal.

The application provides an H-bridge mutual exclusion driving circuit. The circuit comprises: the switching device comprises a forward rotation driving module, a reverse rotation driving module, a first switching tube, a second switching tube, a third switching tube and a fourth switching tube. The first switching tube is grounded through the second switching tube, the fourth switching tube is grounded through the third switching tube, the public end of the first switching tube and the second switching tube is connected with the cathode of the target motor, and the public end of the third switching tube and the fourth switching tube is connected with the anode of the target motor. The two input ends of the forward rotation driving module are respectively connected with a first driving signal and a second driving signal, and the output end of the forward rotation driving module is connected with the base electrode of the second switching tube. The two input ends of the inversion driving module are respectively connected with a first driving signal and a second driving signal, and the output end of the inversion driving module is connected with the base electrode of the third switching tube. Therefore, a decoder chip or other comparator circuits and the like are not needed to be used for forming mutual exclusion, and the current direction flowing through the target motor is controlled by using a small number of elements to form two driving modules, so that the forward operation, the reverse operation or the cut-off of the target motor is realized, and the whole circuit is simplified. Thus, not only the reliability of the circuit is improved, but also the cost required by the H-bridge mutual exclusion driving circuit is reduced.

Drawings

In order to more clearly illustrate the present embodiments or the technical solutions in the prior art, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an H-bridge mutual exclusion driving circuit according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an H-bridge exclusive driving circuit according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of another embodiment of an H-bridge exclusive driving circuit according to the present disclosure.

Detailed Description

As previously described, mutual exclusion (Mutually Exclusive) is a logical relationship, meaning that any one of several variables or events may not be true at the same time as, or concurrent with, one or more other variables or events. Circuit mutual exclusion is a phenomenon that two processes cannot access critical sections of the same critical resource at the same time, and generally, the circuit mutual exclusion is realized by a hardware circuit to realize a specified control function. In the H-bridge mutual exclusion driving circuit, circuit mutual exclusion can be realized specifically by a load (target motor) connected with the H-bridge mutual exclusion driving circuit or voltage inversion/current inversion at two ends of an output end of the H-bridge mutual exclusion driving circuit. The existing H-bridge mutual exclusion driving circuit is generally complex in structure, and most of the H-bridge mutual exclusion driving circuits need to be added with decoders to realize circuit mutual exclusion so as to drive connected motors, so that more elements in the circuit are more, circuit faults are easy to occur, and the cost required by the circuit is higher.

In view of this, the present application provides an H-bridge mutual exclusion driving circuit. The circuit comprises: the switching device comprises a forward rotation driving module, a reverse rotation driving module, a first switching tube, a second switching tube, a third switching tube and a fourth switching tube. The first switching tube is grounded through the second switching tube, the fourth switching tube is grounded through the third switching tube, the public end of the first switching tube and the second switching tube is connected with the cathode of the target motor, and the public end of the third switching tube and the fourth switching tube is connected with the anode of the target motor. The two input ends of the forward rotation driving module are respectively connected with a first driving signal and a second driving signal, and the output end of the forward rotation driving module is connected with the base electrode of the second switching tube. The two input ends of the inversion driving module are respectively connected with a first driving signal and a second driving signal, and the output end of the inversion driving module is connected with the base electrode of the third switching tube. Therefore, a decoder chip or other comparator circuits and the like are not needed to be used for forming mutual exclusion, and the current direction flowing through the target motor is controlled by using a small number of elements to form two driving modules, so that the forward operation, the reverse operation or the cut-off of the target motor is realized, and the whole circuit is simplified. Thus, not only the reliability of the circuit is improved, but also the cost required by the circuit is reduced.

Wherein the transistor is a semiconductor device for controlling a current. The function of the circuit is to amplify weak signals into electric signals with larger amplitude values, and the circuit is also used as a contactless switch, is one of semiconductor basic components, and has the function of current amplification. The triode is characterized in that two PN junctions which are very close to each other are manufactured on a semiconductor substrate, the whole semiconductor is divided into three parts by the two PN junctions, the middle part is a base region, the two side parts are an emitter region and a collector region, and PNP and NPN are arranged. The triode comprises three pins, namely a collector, a base and an emitter. The voltage applied between the base electrode and the emitter electrode of the triode is called base electrode bias voltage, and when the triode is conducted, the silicon tube is generally 0.6-0.7V, and the germanium tube is generally 0.2-0.3V. PNP type transistor is a transistor in which current flows from emitter, and is turned on when voltage difference between emitter and base is greater than 0.7V (silicon) (germanium 0.2V), and is turned off otherwise. The NPN transistor is a transistor into which current flows from the collector, and is turned on when the voltage difference between the base and the emitter is greater than 0.7V (silicon) (germanium 0.2V), and is turned off otherwise. For easy understanding, the triode will be taken as a silicon tube for example, and the description will be expanded.

In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an H-bridge mutual exclusion driving circuit according to an embodiment of the present application, where the circuit includes: a first switching tube 101, a second switching tube 102, a third switching tube 103, a fourth switching tube 104, a forward rotation driving module 105 and a reverse rotation driving module 106.

The first switching tube 101 is grounded through the second switching tube 102, the fourth switching tube 104 is grounded through the third switching tube 103, the common end of the first switching tube 101 and the second switching tube 102 is connected with the cathode of the target motor, and the common end of the third switching tube 103 and the fourth switching tube 104 is connected with the anode of the target motor.

The two input ends of the forward rotation driving module 105 are respectively connected with a first driving signal and a second driving signal, and the output end of the forward rotation driving module 105 is connected with the base electrode of the second switching tube 102.

The two input ends of the inversion driving module 106 are respectively connected with a first driving signal and a second driving signal, and the output end of the inversion driving module 106 is connected with the base electrode of the third switching tube 103.

The first driving signal is an externally input driving signal, and may be at a high level or a low level when the first driving signal is a level signal. The first driving signal may also be other signals, which are not limited in the embodiment of the present application.

The second driving signal is similar to the first driving signal, and may be a level signal input from the outside. It should be noted that the second driving signal is not necessarily the same as the first driving signal. Specifically, the first driving signal and the second driving signal may be both high level or both low level, or the first driving signal may be high level, and the second driving signal may be low level, which is not limited in the embodiment of the present application.

The target motor is a motor driven by the whole circuit and is directly connected with the uplink switch tube and the downlink switch tube. The target motor to which the driving circuit provided in this embodiment is directed may be a direct current motor, or may be a type motor such as a stepping motor and an alternating current motor, which is not limited in the embodiment of the present application.

Optionally, a collector of the first switching tube is connected with a cathode of the target motor, an emitter of the first switching tube is connected with the first power supply, and a base of the first switching tube is connected with an anode of the target motor.

The emitter of the third switching tube is grounded, and the collector of the third switching tube is connected with the positive electrode of the target motor.

Optionally, an emitter of the second switching tube is grounded, and a collector of the second switching tube is connected with a negative electrode of the target motor.

Optionally, a first resistor is further connected between the base electrode and the emitter electrode of the second switching tube, and a second resistor is further connected between the base electrode and the emitter electrode of the third switching tube. The first resistor and the second resistor are pull-down resistors of the second switching tube and the third switching tube, and when the circuit is in a non-working state, the second switching tube and the third switching tube can be in a completely cut-off state.

Optionally, the forward rotation driving module includes a fifth switching tube. The emitter of the fifth switching tube is used for being connected with the first driving signal, the base electrode of the fifth switching tube is used for being connected with the second power supply and the second driving signal, and the collector of the fifth switching tube is used for being connected with the base electrode of the second switching tube.

Optionally, the inversion driving module includes a sixth switching tube. The emitter of the sixth switching tube is used for being connected with the second driving signal, the base electrode of the sixth switching tube is used for being connected with the second power supply and the first driving signal, and the collector of the sixth switching tube is used for being connected with the base electrode of the third switching tube.

It should be noted that the fifth switching tube and the sixth switching tube may be triodes, or may be other devices for controlling the on/off of the circuit, which is not limited in this application.

It should be noted that, references to "first" and "second" in the first power supply and the second power supply are only used for name identification, and do not represent the first and second in sequence.

Optionally, the forward rotation driving module further includes a third resistor, and a base electrode of the fifth switching tube is connected to the second driving signal through the third resistor. The inversion driving module further comprises a fourth resistor, and the base electrode of the sixth switching tube is connected with the first driving signal through the fourth resistor. The third resistor and the fourth resistor are base current limiting resistors of the fifth switching tube and the sixth switching tube. The base current limiting resistor is usually connected between the control signal and the base and is used for preventing the triode from being burnt out due to overlarge base current and can play a role in current limiting.

Optionally, the fifth switching tube is connected to the second power supply through a fifth resistor, and the sixth switching tube is connected to the second power supply through a sixth resistor. The fifth resistor and the sixth resistor are used for enabling the triode Q5 to be in a completely cut-off state when the first driving signal and/or the second driving signal are/is unstable.

In some embodiments, the H-bridge mutual exclusion driving circuit may be specifically connected as shown in fig. 2. In fig. 2, the target motor KL1 is a magnetic latching relay. The up-switch tube comprises three-stage tubes Q2 and Q4, and the up-switch tube comprises three-stage tubes Q1 and Q3. The forward rotation driving module comprises a triode Q5, and the reverse rotation driving module comprises a triode Q6. Wherein Q1, Q4, Q5 and Q6 are PNP type triode, Q2 and Q3 are NPN type triode.

The resistors R7 and R8 are respectively base pull-up resistors of Q5 and Q6, and are used for enabling Q5 and Q6 to be in a cut-off state when the Q2_b and Q3_b level signals are unstable. R5 and R6 are pull-down resistors of Q2 and Q3 for completely turning off Q2 and Q3 in the non-operating state. R1, R2, R3, R4, R9 and R10 are all base current limiting resistors of the triode.

The signal q2_b is a first driving signal, and the signal q3_b is a second driving signal. The manner of combining the signal states of q2_b and q3_b may be as shown in table 1 (where L represents a low level and H represents a high level):

TABLE 1

Q2_b	Q3_b	Whether the motor is operating	Direction of current flow
				L	L	Whether or not	No current
H	L	Is that	VCC1→Q4→KL1→Q2→GND
				L	H	Is that	VCC1→Q1→KL1→Q3→GND
H	H	Whether or not	No current

Taking q2_b and q3_b as examples, the base bias voltages of the transistors Q5 and Q6 are both smaller than 0.7V, the on condition is not satisfied, and Q5 and Q6 are both off. At this time, the bases of Q2 and Q3 are both low voltage, and the voltage difference between the bases and emitters of Q2 and Q3 is less than 0.7V due to the pull-down resistors R5, R6, and both remain off. Similarly, Q1 and Q4 are also off, no current is generated at this time, and motor KL1 is in a braking state.

Taking q2_b as H (high level) and q3_b as L (low level) as an example, the voltage difference between the emitter and the base of Q5 is greater than 0.7v, and Q5 is turned on. At this time, the base of Q2 is also at high level, and the emitter of Q2 is grounded, so the voltage difference between the base and emitter of Q2 is greater than 0.7V, meeting the conduction condition, and Q2 is turned on. At this time, the collector of Q2 is grounded, the collector voltage (i.e., the signal q4_b) is 0, the voltage at the base of Q4 is also 0, and the emitter of Q4 is connected to the external power supply (VCC 1), so the voltage difference between the base and the emitter of Q4 is greater than 0.7V, and Q4 is turned on, satisfying the on condition. At this time, the states of Q6, Q1, and Q3 are all in the off state. Thus, the current flows from VCC1 to Q4 to kl1 to Q2 to GND, and from the positive electrode to the negative electrode of the motor KL1, and KL1 is clicked to operate in the forward direction.

Taking q2_b as L (low level) and q3_b as H (high level) as an example, the voltage difference between the emitter and base of Q6 is greater than 0.7v, and Q6 is turned on. At this time, the base of Q3 is also at high level, and the emitter of Q3 is grounded, so the voltage difference between the base and emitter of Q3 is greater than 0.7V, meeting the conduction condition, and Q3 is turned on. At this time, the collector of Q3 is grounded, the collector voltage (i.e., the signal q1_b) is 0, the voltage at the base of Q1 is also 0, and the emitter of Q1 is connected to the external power supply (VCC 1), so the voltage difference between the base and the emitter of Q1 is greater than 0.7V, and Q1 is turned on, satisfying the on condition. At this time, Q5, Q2, and Q4 are in an off state. Thus, the current flows from VCC1 to Q1 to kl1 to Q3 to GND, and the current flows from the negative electrode to the positive electrode of the motor KL1, and the click KL1 is operated in the reverse direction.

Taking q2_b and q3_b as H (high level) as an example, the voltage difference between the bases and emitters of the transistors Q5 and Q6 is less than 0.7V, the on condition is not satisfied, and Q5 and Q6 are both off. At this time, the bases of Q2 and Q3 are both low voltage, and the voltage difference between the bases and emitters of Q2 and Q3 is less than 0.7V due to the pull-down resistors R5, R6, and both remain off. Similarly, Q1 and Q4 are also off, no current is generated at this time, and motor KL1 is in a braking state.

The embodiment of the application provides an H-bridge mutual exclusion driving circuit, which controls the on or off states of an uplink switching tube and a downlink switching tube only by using a small number of elements to form two driving modules, thereby controlling the current direction flowing through a target motor, realizing signal hardware mutual exclusion, avoiding the use of a large number of complex components such as decoder chips or other comparator circuits, and simplifying the whole circuit. Thus, not only the reliability of the circuit is improved, but also the cost required by the circuit is reduced.

In the embodiment of the present application, there are many possible implementations of the circuit described in fig. 1, and the following description will exemplify a case where photocouplers (abbreviated as optocouplers) are included in the forward driving module and the reverse driving module. It should be noted that the implementations presented in the following description are only exemplary and not representative of all implementations of the embodiments of the present application.

In this embodiment, the connection manner of the H-bridge mutual exclusion driving circuit is shown in fig. 3.

In fig. 3, the target motor is still KL1. The up-switch tube comprises three-stage tubes Q2 and Q4, and the up-switch tube comprises three-stage tubes Q1 and Q3. The forward rotation driving module comprises a photoelectric coupler K1, and the reverse rotation driving module comprises a photoelectric coupler K2. The transistor types of Q1, Q2, Q3 and Q4 are unchanged as described above.

The photocoupler is composed of a light emitting diode and a phototriode and generally comprises four pins. The operation principle is as follows: when the electric signal is sent to the input end of the photoelectric coupler, the light emitting diode emits light through current, the photosensitive element generates current after being illuminated, and the phototriode is conducted; when the input end has no signal, the LED is not bright, and the phototransistor is turned off.

Specifically, the optocoupler K1 includes a first pin (1), a second pin (2), a third pin (3), and a fourth pin (4), and the connection manner may be: the first pin is used for being connected with the second power supply VCC2, the second pin is used for being connected with the first driving signal Q2_b, the third pin is used for being connected with the base electrode of the third switching tube, and the fourth pin is used for being connected with the second driving signal Q3_b.

Specifically, the optocoupler K2 includes a fifth pin (1), a sixth pin (2), a seventh pin (3), and an eighth pin (4), and the connection manner may be: the fifth pin is used for being connected with a second power supply VCC2, the sixth pin is used for receiving a second driving signal Q3_b, the seventh pin is used for being connected with a base electrode of a second switching tube, and the eighth pin is used for being connected with a first driving signal Q2_b.

The resistors R7 and R8 are pull-up resistors of K2 and K1, respectively, and are used for turning off K1 and K2 when the q2_b and q3_b level signals are unstable. R5 and R6 are pull-down resistors of Q2 and Q3 for completely turning off Q2 and Q3 in the non-operating state. R1, R2, R3 and R4 are all base current limiting resistors of the triode.

The signal q2_b is a first driving signal, and the signal q3_b is a second driving signal. The combination of q2_b and q3_b is as described above, and will not be described here.

Taking q2_b as L (low level), q3_b as H (high level) as an example, pin 2 of K1 is low level, a voltage difference exists between pin 1 and pin 2 of K1, the diode in K1 emits light by current, and the phototransistor is turned on, so that the voltage of pin 3 is equal to the voltage of pin 4 and is also high level. The base electrode of Q3 is high level, the emitter electrode is grounded to low level, the voltage difference is more than 0.7V, and Q3 is conducted. Similarly, Q1 is on. While the voltages at pin 1 and pin 2 of K2 are both high, there is no current through the diode in K2, so pin 3 of K1 outputs a low level. The base electrode and the emitter electrode of the Q2 are both in low level, the conduction condition is not met, and the Q2 is cut off. Similarly, Q4 is off. Therefore, the current direction in the circuit at this time is: VCC1→Q1→KL1→Q3→GND. The current is reversed through KL1, KL1 is reversed.

Taking q2_b as H, q3_b as L as an example, pin 2 of K2 is at low level, a voltage difference exists between pin 1 and pin 2 of K2, the diode in K2 emits light through current, the phototransistor is turned on, so that the voltage of pin 3 is equal to the voltage of pin 4, and a high level is output. The base electrode of Q2 is high level, the emitter electrode is grounded to low level, the voltage difference is more than 0.7V, and Q2 is conducted. Similarly, Q4 is on and K1, Q1 and Q3 are off. At this time, the current direction in the circuit VC1→Q4→KL1→Q2→GND. The current passes through KL1 in the forward direction, and KL1 operates in the forward direction.

Taking the example that q2_b and q3_b are both L (low level), K1 and K2 are both on, and the low level can reach the bases of Q2 and Q3 through K1 and K2, but Q2 and Q3 are off because Q2 and Q3 do not satisfy the on condition. Similarly, Q1 and Q4 are off. No current is generated, KL1 is in a braking state.

Taking q2_b and q3_b as H (high level) as an example, K1 and K2 are both turned off, Q2 and Q3 remain turned off due to pull-down resistors R5 and R6, and Q1 and Q4 are also turned off. At this time, no current is generated in the circuit, and the motor KL1 does not operate.

The value of the embodiment of the application adopts the photoelectric coupler and a small amount of resistors to form two driving modules to control the on and off of the uplink switching tube and the downlink switching tube, thereby controlling the current direction passing through the target motor KL1, replacing a large number of operational amplifier or comparator circuits in the prior art, realizing the simplification of the H-bridge mutual exclusion driving circuit and reducing the cost required by the circuit.

It should be understood that references to "first," "second," and the like in this application are for name identification only, and do not represent sequential first and second.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the present application in any way. While the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application. Many possible variations and modifications may be made to the disclosed technology by anyone skilled in the art, or equivalent embodiments may be made, without departing from the scope of the technology of the present application. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present application, which do not depart from the content of the technical solution of the present application, still fall within the scope of protection of the technical solution of the present application.

Claims

1. An H-bridge mutex driving circuit, comprising: the device comprises a forward rotation driving module, a reverse rotation driving module, a first switching tube, a second switching tube, a third switching tube and a fourth switching tube;

2. The circuit of claim 1, wherein the circuit comprises a plurality of capacitors,

the collector of the first switching tube is connected with the negative electrode of the target motor, the emitter of the first switching tube is connected with a first power supply, and the base of the first switching tube is connected with the positive electrode of the target motor;

3. The circuit of claim 2, wherein the circuit further comprises a logic circuit,

the emitter of the second switching tube is grounded, and the collector of the second switching tube is connected with the negative electrode of the target motor;

4. A circuit according to claim 3, wherein a first resistor is further connected between the base and the emitter of the second switching tube;

5. The circuit of claim 1, wherein the forward drive module comprises a fifth switching tube;

6. The circuit of claim 5, wherein the reverse drive module comprises a sixth switching tube;

7. The circuit of claim 6, wherein the forward drive module further comprises a third resistor, the base of the fifth switching tube being connected to the second drive signal through the third resistor;

8. The circuit of claim 6, wherein the fifth switching tube is connected to the second power supply through a fifth resistor, and the sixth switching tube is connected to the second power supply through a sixth resistor.

9. The circuit of any of claims 1-8, wherein the inversion driving module comprises a first optocoupler;

10. The circuit of any one of claims 1-8, wherein the forward drive module comprises a second optocoupler;