EP3935730A1 - Verfahren zum schwingungs- und geräuschreduzierten betreiben einer elektro- motorischen vorrichtung und elektromotorische vorrichtung - Google Patents
Verfahren zum schwingungs- und geräuschreduzierten betreiben einer elektro- motorischen vorrichtung und elektromotorische vorrichtungInfo
- Publication number
- EP3935730A1 EP3935730A1 EP20716160.5A EP20716160A EP3935730A1 EP 3935730 A1 EP3935730 A1 EP 3935730A1 EP 20716160 A EP20716160 A EP 20716160A EP 3935730 A1 EP3935730 A1 EP 3935730A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- torque
- target
- current
- rotor angle
- electric motor
- 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.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000011156 evaluation Methods 0.000 claims abstract description 56
- 230000015654 memory Effects 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 description 11
- 230000008901 benefit Effects 0.000 description 8
- 230000006978 adaptation Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/08—Reluctance motors
- H02P25/098—Arrangements for reducing torque ripple
-
- 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
- H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
- A47J43/07—Parts or details, e.g. mixing tools, whipping tools
- A47J43/08—Driving mechanisms
- A47J43/085—Driving mechanisms for machines with tools driven from the lower side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J7/00—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs
- B60J7/02—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes
- B60J7/04—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of sliding type, e.g. comprising guide shoes with rigid plate-like element or elements, e.g. open roofs with harmonica-type folding rigid panels
- B60J7/057—Driving or actuating arrangements e.g. manually operated levers or knobs
- B60J7/0573—Driving or actuating arrangements e.g. manually operated levers or knobs power driven arrangements, e.g. electrical
-
- 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
- H02P2207/00—Indexing scheme relating to controlling arrangements characterised by the type of motor
- H02P2207/05—Synchronous machines, e.g. with permanent magnets or DC excitation
Definitions
- the invention relates to a method for vibration and noise-reduced operation of an electromotive device and a vibration and noise-reduced electromotive device, in particular a vibration and noise-reduced electrical household appliance and a vibration and noise-reduced sliding or lifting roof of an automobile.
- Electromotive devices such as electrical household appliances and electrical sliding or lifting roofs for automobiles are known as such from the prior art.
- the object of the invention is to show a method for operating an electromotive device, which can be used with little effort at different Chen variants of electromotive devices is applicable and effectively reduces the noise level. Furthermore, it is the object of the invention to provide an electromotive device, in particular an electric household appliance and an electric vehicle roof, which are designed to operate with reduced vibration and noise.
- the method for operating an electromotive device with reduced vibration and noise is carried out by means of an electromotive device with the features described below.
- the electromotive device for carrying out the method has an electric motor arrangement, a base body and a driven working group.
- the electric motor of the electric motor arrangement is arranged in a defined position in relation to the base body.
- the base body is designed, for example, as a housing or frame and defines the positional relationship between the electric motor and the driven working group.
- the driven working group picks up the rotational movement provided by the electric motor and executes the target movement, it being possible for conversion to take place using a gear unit.
- the driven working group can have a cutting or chopping unit, for example.
- the driven working group has, in particular, a transmission and a mechanism for changing the position of the movable roof section.
- the electric motor arrangement has the electric motor, a control and evaluation unit, a data memory, a current regulator, a rotor angle sensor and a torque evaluator.
- the data memory, the current regulator, the rotor angle sensor and the torque evaluator are each data-connected to the control and evaluation unit.
- the control and evaluation unit is designed to receive data from the rotor angle sensor and torque evaluator and to process them. Furthermore, the control and evaluation unit is designed to control the current regulator and to read data from the data memory and also to write it into the data memory.
- the control and evaluation unit is preferably an electronic circuit such as a computer or a controller.
- the data memory, the torque evaluator and the current regulator can form an integrated structural unit together with the control and evaluation unit.
- the electric motor has a stator, a rotor and motor coils.
- the rotor is preferably located inside a rotationally symmetrical stator and is rotatably mounted about an axis of rotation.
- the stator or the rotor or both components have soft magnetic material in a tooth structure. These are also referred to below as stator teeth and rotor teeth.
- the rotor teeth are also sometimes referred to below as rotor arms.
- the motor coils are arranged on the stator, preferably symmetrically about the axis of rotation of the rotor on the stator teeth.
- the electric motor has commutation by means of an electronic circuit and, moreover, can be designed in different ways, for example as a brushless direct current motor. It is preferably a switched reluctance motor.
- a reluctance motor is designed in such a way that a magnetic flux is generated through the rotor when an electric current is applied to the motor coils.
- the reluctance force aligns the rotor teeth with the stator teeth in such a way that the magnetic resistance is reduced. Due to the geometric arrangement of the rotor teeth and Stator teeth relative to one another thus cause the rotor to rotate.
- the switched reluctance motor is also referred to in the following in a partially abbreviated manner simply as a reluctance motor or motor.
- the method according to the invention is based on the knowledge that the rotor teeth and the stator teeth deform as a result of the force acting on them, in the case of a reluctance motor, the reluctance force, in particular transversely to their longitudinal axes.
- This deformation leads to vibrations of the rotor teeth and the stator teeth as well as partly also other mechanically connected components of the reluctance motor or a driven working group, which are perceived as noise in the range of the audible frequency.
- the method shows a solution according to which the force on the rotor teeth and stator teeth is controlled in such a way that their vibration is reduced.
- the torque is kept constant in all angular positions of the rotor. This means that essentially constant forces act transversely to their longitudinal axes on the rotor teeth and stator teeth.
- the method provides a solution which is not tied to a specific geometry or other structural design of the rotor teeth and stator teeth.
- the method includes the following method steps: a) Definition of a value table in the data memory which contains several table points, the table points being formed as value tuples.
- the value tuples each contain a value pair consisting of a target torque and a rotor angle as well as an assigned target current.
- Execution of a partial cycle b) 1 specification of a target torque b) 2 detection of a first actual rotor angle by means of the rotor angle sensor
- Reading out the target current by means of the control and evaluation unit, which is assigned to the first pair of values, the target torque and the first actual rotor angle.
- the two closest table points to the specified target torque and the closest two table points to the actual rotor angle are determined and the distance between the real values of the target torque and the first actual rotor angle from the table points is calculated.
- the target current is determined by bilinear interpolation from the respective target currents of the four table points.
- Setpoint currents for the respective motor coil to be acted upon are assigned to a rotor angle (Gist) and the setpoint torque.
- a table point forms a tuple of values which has the rotor angle (Gist), the target torque (Msoii) and at least one target current, or preferably two target currents, specifically one target current for two adjacent motor coils (h,).
- Table 1 shows a table of values for an electric motor with two coils. In the case of an electric motor with more coils, the value tuples contain additional target current values for each additional coil.
- This table of values is stored in the data memory.
- the control and evaluation unit is designed to access the data memory and the value table. b) Carrying out a partial cycle b) 1 specification of a target torque
- the specification of a target torque is determined by the load that is to be applied by the motor to provide the movement of the driven work group.
- the target torque is specified by the control and evaluation unit when the electric motor is started.
- the rotor angle sensor measures the mechanical angular position of the rotor. In this way it is known how the rotor teeth and the stator teeth are positioned with respect to one another. The rotor angle sensor thus simultaneously determines the position of the rotor within an engine state. b) 3 Reading out the target current by means of the control and evaluation unit
- the control and evaluation unit reads the target currents for the nearest rotor angles and the target torque from the value table of the data memory.
- the values of the four surrounding table points read out are offset against the real values and the distance between the real values of the target torque and the first actual rotor angle and the table points is determined.
- An example of four points determined is highlighted in the table of values by a frame.
- the target currents are calculated from the respective target currents of the four table points using bilinear interpolation. b) 4 Setting the target currents using the current regulator
- the current controller sets the calculated target currents for the respective motor coils.
- This can be any type of current regulator known from the prior art that has sufficiently fast switching times. It is preferably a digital current regulator.
- b) 5 Applying current to the motor coils
- the current controller directs the nominal current to the corresponding motor coil, which generates a magnetic flux and, as a result, a force on the rotor.
- the torque evaluator determines the actual torque.
- the actual torque is preferably determined from the available parameters such as the actual currents and the rotor angle.
- b) 7 Determination of a torque deviation using the control and evaluation unit The control and evaluation unit determines a torque deviation by comparing the target torque with the actual torque.
- b) 8 calculation of a corrected setpoint current by means of the control and evaluation unit on the basis of the torque deviation
- a detected torque deviation shows that the level of the setpoint current was not completely suitable for setting the specified setpoint torque.
- the amount of the detected torque deviation results in a statement as to the extent to which a changed setpoint current would likely lead to the actual torque corresponding to the setpoint torque.
- the calculation is made for all four table points last used.
- the calculation is based on the interpolation distance used (h, I) and the torque deviation (Msoii-Mist).
- a learning constant (Ki_ern) is also included in the calculation.
- the control and evaluation unit writes the determined values for the corrected setpoint currents in the value tuples of the four table points. c) Repeated execution of the partial cycle until a motor angle which corresponds to a complete motor state is reached
- the motor state is the operating phase of the motor from one commutation to the next commutation.
- the rotor runs through all angular positions starting from the angular position of one commutation to the next Commutation.
- the angular position at the end of a motor state is the same as the angular position at the beginning of the next motor state.
- the partial cycle is repeated until the rotor of the electric motor has reached a rotation angle which corresponds to a congruent position to the rotation angle at the beginning of the next motor state. Depending on the number of arms of the rotor, it always reaches a congruent position for such a motor state after an angle that corresponds to 360 ° divided by the number of motor states. A rotationally symmetrical design of the rotor is assumed.
- An overall cycle thus denotes the totality of all partial cycles that are carried out from the beginning of an engine state to the end of an engine state.
- a first motor state is completed after the rotor has rotated through 60 °.
- Six motor states and thus six total cycles are run through for a complete rotor rotation by 360 °. This is repeated over and over to bring about a permanent rotation of the rotor.
- the method according to the invention has the following particular advantages.
- the process is iteratively self-learning. With each cycle of a partial cycle, the table points are optimized in relation to the value of the target current. As the process continues, all table points are recorded by the optimization. As a result of the repeated execution, the setpoint current continues to approach the optimal value, so that the torque deviation is asymptotically adjusted to zero.
- the method can be used with different engines without adaptation or with only little adaptation effort. It is only necessary to initially fill the table of values with roughly determined values that only have to enable the motor to run. By using the method, an optimization of the values of the target current in adaptation to the respective motor is achieved automatically with each run of the partial cycles and the overall cycle.
- the method provides automatic compensation for any manufacturing tolerances.
- the method provides an automatic adaptation to changes that may not occur gradually until the motor is in operation, such as imbalances or out-of-round running due to bearing wear.
- the process ensures that the target currents of the respective Depending on the physical condition of the engine, in particular the state of wear
- the method according to the invention is of particular advantage when the electromotive device is an electrical kitchen appliance, such as a mixer or a multifunctional device with a shredder, or an electrical sliding or lifting roof of an automobile.
- the electromotive device is in particular proximity to the human ear, so that noise reduction is particularly important.
- the table of values is designed for a complete revolution of the rotor.
- table points are reversibly assigned to each physical positional relationship of a rotor tooth to a stator tooth. In this way, even the finest manufacturing differences in the individual rotor or stator teeth, imbalances or signs of wear on the rotor can be compensated for by the process. As a result, the smoothness of the electric motor can be increased and guaranteed even after long running times.
- the electromotive device has an electric motor arrangement, a base body and a driven working group.
- the electric motor arrangement is designed to carry out the following: a) Storage of a table of values in the data memory, which table contains several table points, the table points being formed as value tuples.
- the value tuples each contain a value pair consisting of a target torque and a rotor angle as well as an assigned target current.
- Execution of a partial cycle b) 1 Specification of a target torque b) 2 Detection of a first actual rotor angle by means of the rotor angle sensor b) 3 Reading of the target current by means of the control and evaluation unit, the first value pair the target torque and is assigned to the first actual rotor angle.
- the two closest table points to the specified target torque and the closest two table points to the actual rotor angle are determined and the distance between the real values of the target torque and the first actual rotor angle from the table points is calculated.
- the target current is determined by bilinear interpolation from the respective target currents of the four table points.
- the data memory is designed to store a value table with table items.
- the table points are formed by value tuples, each value tuple having a value pair consisting of a target torque and a rotor angle as well as an assigned target current.
- the rotor angle sensor is designed to detect an actual rotor angle and to transmit it to the control and evaluation unit and to the torque evaluator.
- the control and evaluation unit is designed to read from the data memory from the table of values stored there a setpoint current that is assigned to the pair of values from the setpoint torque and the first actual rotor angle.
- the control and evaluation unit is used to determine the closest table points, to calculate the distance between the real values of the target torque and the first actual rotor angle from the table points and to calculate the target current by means of bilinear interpolation from the respective target Flow of the four table points formed.
- the current regulator is designed to set a target current, which is specified by the control and evaluation unit, for application to the motor coils.
- the torque evaluator is designed to determine an actual torque and to transmit the determined actual torque to the control and evaluation unit.
- the control and evaluation unit is also designed to determine a torque deviation by comparing the actual torque obtained by the torque evaluator with the target torque, to calculate a corrected target current based on the torque deviation and to calculate this for the four last used table points depending on the interpolation distance in the data memory in the table of values.
- the electromotive device according to the invention has the following advantages in particular.
- a particularly smooth running and noise reduction are achieved with little technical equipment.
- the demands on the manufacturing accuracy of the physical motor components as well as the driven working group can be reduced, since the device provides an automatic compensation for any manufacturing tolerances.
- the device according to the invention also provides automatic adaptation to changes that gradually arise in the course of operation of the device, such as imbalances or irregular running due to bearing wear, by adapting the target currents to the respective physical condition of the motor, in particular the state of wear.
- the service life of the electromotive device can be increased without additional manufacturing effort, since the driven working group is only exposed to low vibrations and thus low dynamic loads.
- the electromotive device is designed as a household appliance operated by an electric motor.
- Household appliances in this sense are in particular, but not limited to, mixers, blenders, stirrers, coffee grinders, multifunctional devices with food-shredding devices and vacuum cleaners.
- the electromotive device is designed as a household appliance operated by an electric motor, wherein the powered workgroup has a food grinder.
- a chopping mechanism such as a mixer or hand blender or a multifunctional device or a grinder.
- a particular advantage is that in addition to the aspect of manual operation of such devices and the associated spatial proximity to an operator, a particularly effective noise reduction is possible with the electric motors of these devices that usually run very quickly.
- the electromotive design is designed as an electric vehicle roof.
- An electric vehicle roof is understood to be an electric motor-operated sliding roof, lifting roof or sliding and lifting roof.
- Fig. 1 Electric motor device as a household appliance in a schematic
- FIG. 1 shows a schematic representation of an electromotive device which, in the exemplary embodiment, is designed as a household appliance driven by an electromotive. In the exemplary embodiment, it is a multifunctional device which is provided with replaceable driven work groups.
- FIG. 1 shows the base body II on which the electric motor arrangement I and the driven working group III are arranged.
- the driven working group III has a transmission shaft which carries a food comminution unit 10.
- the food comminution unit 10 in the exemplary embodiment is a rotating cutting knife.
- Figure 2 shows a schematic structure of the electric motor arrangement.
- the electric motor arrangement has a control and evaluation unit 2, a data memory 3, a current regulator 4, a rotor angle sensor 5, a torque evaluator 6 and an electric motor 1.
- the current regulator 4, the rotor angle sensor 5 and the torque evaluator 6 are each connected to the electric motor 1 and the control and evaluation unit 2.
- the data memory 3 with the table of values is integrated into the control and evaluation unit 2.
- the electric motor 1 has a stator 7, a rotor 8 and several motor coils 9.
- the current regulator regulates the nominal currents for the motor coils to the values transmitted by the control and evaluation unit.
- the rotor angle sensor 5 determines the position of the rotor 8 and transmits this to the control and evaluation unit 2 and to the torque evaluator 6.
- the torque evaluator 6 determines from the parameters applied to the electric motor 1, in the exemplary embodiment in particular from the actual current, based on a specific rotor angle the actual torque and transmits the This is also sent to the control and evaluation unit 2. From this, the control and evaluation unit 2 calculates a torque deviation and, on this basis, optimized target current values and enters these in the value table of the data memory 3 in place of the previous target current values.
- FIG. 3 shows a scheme of the method for the noise-reduced operation of an electromotive device.
- the scheme shows a summary of all method steps from a) to d), with method step b) being shown with all sub-steps.
- the partial cycle (process step b)) is repeated until the end of the first motor state is reached and after the first motor state has been reached, it is repeated until the end of the next motor state (process step c)). This is an overall cycle.
- the table of values is constantly updated in method step b) 9.
- FIG. 4 shows a compilation of graphics for the torque behavior of the electric motor, in the present exemplary embodiment a reluctance motor, when the method is used.
- the switched reluctance motor still shows high torque peaks, also known as torque ripples, which are caused by a non-optimal superimposition of the partial torques, especially during the transition from one motor state to the next (bottom left).
- the torque peaks are significantly reduced (bottom right) and the partial torques are more advantageously superimposed.
- the torque peaks are responsible for the oscillation of the rotor teeth and stator teeth and thus for a loud running noise of the reluctance motor.
- the reduction of the torque peaks also reduces the engine noise.
- FIG. 5 shows the interpolation of the values in the coordinate system a) and the calculation of the corrections for the setpoint currents in table b).
- the value interpolation according to method step b) 3 is shown graphically in coordinate system a).
- the control and evaluation unit receives the target torque and the rotor angle sensor supplies the actual rotor angle ( ⁇ ist).
- the control and evaluation unit determines the four closest table points (P11, P12, P21, P22) and interpolates a target current (oii) using bilinear interpolation.
- the value for a nominal current (Uoii) obtained in this way by interpolation is set in process steps b) 4 and b) 5 by the current regulator and passed to the motor coils.
- process step b) 6 the actual torque (Mist) present is evaluated by means of the torque evaluator and in process step b) 7 by the control and evaluation unit with the target torque (Msoii) to a torque deviation (Msoii-Mist) offset.
- FIG. 5 shows the calculation formulas for the correction values (according to method step b) 8) with the torque deviation based on the interpolation distances used (h, I), a learning constant (Ki_em) and the torque deviation (Msoii-Mist).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Food Science & Technology (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019001461.8A DE102019001461A1 (de) | 2019-03-04 | 2019-03-04 | Verfahren zum schwingungs-und geräuschreduzierten Betreiben einer elektromotorischen Vorrichtung und elektromotorische Vorrichtung |
| PCT/DE2020/000039 WO2020177793A1 (de) | 2019-03-04 | 2020-02-27 | Verfahren zum schwingungs- und geräuschreduzierten betreiben einer elektro- motorischen vorrichtung und elektromotorische vorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3935730A1 true EP3935730A1 (de) | 2022-01-12 |
Family
ID=70109991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20716160.5A Withdrawn EP3935730A1 (de) | 2019-03-04 | 2020-02-27 | Verfahren zum schwingungs- und geräuschreduzierten betreiben einer elektro- motorischen vorrichtung und elektromotorische vorrichtung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20220173676A1 (de) |
| EP (1) | EP3935730A1 (de) |
| CN (1) | CN113454906A (de) |
| DE (1) | DE102019001461A1 (de) |
| WO (1) | WO2020177793A1 (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019001462A1 (de) * | 2019-03-04 | 2020-09-10 | Nidec Drivexpert Gmbh | Verfahren zum geräuschreduzierten Betreiben eines geschalteten Reluktanzmotors |
| US11784599B2 (en) * | 2022-02-06 | 2023-10-10 | Tokyo Institute Of Technology | Noise reduction in switched reluctance motor with selective radial force harmonics reduction |
| US12611066B2 (en) | 2023-06-09 | 2026-04-28 | Sharkninja Operating Llc | Blender food item texture control |
| USD1075401S1 (en) | 2023-08-01 | 2025-05-20 | Sharkninja Operating Llc | Blender |
| USD1101490S1 (en) | 2023-08-02 | 2025-11-11 | Sharkninja Operating Llc | Blender user interface |
| US12178360B1 (en) | 2023-08-08 | 2024-12-31 | Sharkninja Operating Llc | Intelligent blending and user interface |
| CN120979274B (zh) * | 2025-10-20 | 2026-01-30 | 嘉兴大学 | 一种电驱总成的振动噪声优化方法及系统 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5223775A (en) * | 1991-10-28 | 1993-06-29 | Eml Research, Inc. | Apparatus and related method to compensate for torque ripple in a permanent magnet electric motor |
| EP1139554A3 (de) * | 2000-03-29 | 2003-12-17 | Microchip Technology Inc. | Sanfter Start eines mit einem Mikro-Controller betriebenen elektrischen Motors unter Verwendung einer Tabelle der Antriebsgleichung mit variablem Timing |
| JP4033030B2 (ja) * | 2003-04-21 | 2008-01-16 | 株式会社ジェイテクト | 電動パワーステアリング装置 |
| JP5131318B2 (ja) * | 2009-10-29 | 2013-01-30 | トヨタ自動車株式会社 | モータ制御装置 |
| US9143081B2 (en) * | 2013-03-14 | 2015-09-22 | Steering Solutions Ip Holding Corporation | Motor control system having bandwidth compensation |
| EP3121952B1 (de) * | 2015-07-21 | 2018-12-05 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Geschalteter reluktanzmotor mit treiberschaltung und verfahren zur steuerung eines geschalteten reluktanzmotors |
| CN110915126B (zh) * | 2017-07-19 | 2023-10-20 | 株式会社捷太格特 | 马达控制装置 |
| KR102436844B1 (ko) * | 2018-02-02 | 2022-08-26 | 주식회사 만도 | 모터의 토크 보상 장치 및 방법 |
-
2019
- 2019-03-04 DE DE102019001461.8A patent/DE102019001461A1/de not_active Withdrawn
-
2020
- 2020-02-27 EP EP20716160.5A patent/EP3935730A1/de not_active Withdrawn
- 2020-02-27 US US17/436,796 patent/US20220173676A1/en not_active Abandoned
- 2020-02-27 CN CN202080015023.3A patent/CN113454906A/zh active Pending
- 2020-02-27 WO PCT/DE2020/000039 patent/WO2020177793A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019001461A1 (de) | 2020-09-10 |
| WO2020177793A1 (de) | 2020-09-10 |
| US20220173676A1 (en) | 2022-06-02 |
| CN113454906A (zh) | 2021-09-28 |
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