CN102064753A - Alternating current permanent-magnet synchronous machine controller - Google Patents
Alternating current permanent-magnet synchronous machine controller Download PDFInfo
- Publication number
- CN102064753A CN102064753A CN200910211097XA CN200910211097A CN102064753A CN 102064753 A CN102064753 A CN 102064753A CN 200910211097X A CN200910211097X A CN 200910211097XA CN 200910211097 A CN200910211097 A CN 200910211097A CN 102064753 A CN102064753 A CN 102064753A
- Authority
- CN
- China
- Prior art keywords
- magnet synchronous
- permanent magnet
- signal
- current
- synchronous 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.)
- Pending
Links
Images
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to an alternating current permanent-magnet synchronous machine controller which comprises a digital signal microprocessor (DSP), a power converter, an alternating current permanent-magnet synchronous machine, a position detector and a current detector, wherein the position detector inputs the detected rotor position signal and rotor speed signal of the alternating current permanent-magnet synchronous machine by a quadrature encoder pulse (QEP) unit of the DSP; the current detector inputs the detected current signal of the alternating current permanent-magnet synchronous machine by an analog to digital (A/D) conversion interface of the QEP of the DSP; the DSP calculates the given value of current according to the input rotor position signal and rotor speed signal, and compares the given value of current with the input detected value of current to obtain the corresponding control signal for controlling the width of the pulse-width modulation (PWM) pulse; and the PWM signal drives the alternating current permanent-magnet synchronous machine by the power converter. The invention has the advantages of compact and firm structure, simple circuit, low cost, reliable performance, stable operation, wide speed adjusting range, high efficiency, high accuracy and the like.
Description
Technical field:
The present invention relates to a kind of AC permanent magnet synchronous motor controller, this controller all can be used in fields such as electric automobile, Digit Control Machine Tool, industrial robot, air-conditioning.
Background technology:
Controller is the vital part of drive system of electric automobile, is determining the whether good of drive system performance.Over past ten years, mainly develop AC induction motor controller and brushless permanent magnet motor controller.Compare with original dc traction motor controller, have clear superiority, its outstanding advantage be the efficient height, non-maintaining substantially, speed adjustable range is wide.Its research and development present situation and development trend are as follows.
1. asynchronous machine controller
The characteristics of asynchronous machine controller are sturdy and durable, reliable, can realize controlling the motor low torque ripple, and low noise does not need position transducer, the rev limit height.The vector control speed adjusting technique comparative maturity of asynchronous machine controller, therefore early be applied to electric automobile, remain the main product (especially in the U.S.) of electric vehicle controller at present, but progressively replaced by other novel brush-less permanent magnetic traction motor controller.Disadvantage is the controller circuitry complexity, and control efficiency is not high, is unfavorable for realizing industrialization.
2. brush-less permanent magnetic synchronous machine controller
Brush-less permanent magnetic synchronous machine controller has higher power density and efficient and broad speed adjustable range, and development prospect is very wide, is strong competitor in the motor vehicle traction motor controller, obtains in the multiple at home and abroad motor vehicle to use.Maximum shortcoming is that control precision is not high, therefore is applied in some occasions lower to required precision usually.
Summary of the invention:
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, provide that a kind of compact conformation is firm, the simple cost of circuit is low, dependable performance and in the range of speeds inner control efficient of broadness and control precision all than higher AC permanent magnet synchronous motor controller.
In order to realize the foregoing invention purpose, the present invention has adopted following technical scheme:
A kind of AC permanent magnet synchronous motor controller, comprise the DSP microprocessor, the variable power device, AC permanent magnet synchronous motor and position detector and current detector, described position detector is imported the rotor-position signal and the spinner velocity signal of its detected AC permanent magnet synchronous motor by the QEP unit of DSP microprocessor, described current detector is imported the current signal of its detected AC permanent magnet synchronous motor by the A/D translation interface of DSP microprocessor, described DSP microprocessor is according to the rotor-position signal and the spinner velocity calculated signals set-point that goes out electric current of input, compare with the current detection value of input again, draw the width of control signal corresponding control output pwm pulse, pwm signal drives AC permanent magnet synchronous motor through the variable power device.
Described variable power device adopts three-phase inversion bridge-type structure, and when controller voltage was lower than 200V, described variable power device adopted the MOSFET inverter, and when controller voltage was higher than 200V, described variable power device adopted the IGBT inverter.
Described position detector adopts incremental optical-electricity encoder, and it exports 3 couples of differential signal: A+, A-, B+, B-, Z+, Z-; Wherein A mutually and B phase signals quadrature judges that two signal phase differences can judge the direction of rotation of AC permanent magnet synchronous motor, and the Z phase signals is a zero signal, and every rotation 1 circle of incremental optical-electricity encoder passes through zero-bit and exports 1 pulse.
Described current detector comprises Hall element, operational amplifier A, operational amplifier B and operational amplifier C, the phase current of described AC permanent magnet synchronous motor is detected by Hall element, detection signal carries out exporting negative voltage after the current/voltage-converted through operational amplifier A, be added to the input of operational amplifier B subsequently, this negative voltage is carried out oppositely and the ratio amplification, carry out level deviation through operational amplifier C at last, make output voltage range furnishing 0～3V.
Be provided with current foldback circuit in the circuit of described variable power device, described current foldback circuit is mainly realized by an integrated voltage comparator LM393, when the motor operate as normal, FAULT holds high resistant, the positive input terminal voltage of integrated voltage comparator LM393 is higher than negative input end voltage, output output high level; When machine operation during in over-current state, FAULT holds output low level, makes the positive input terminal voltage of integrated voltage comparator LM393 be lower than negative input end voltage, the output end voltage counter-rotating, the PWM output that triggers the DSP microprocessor is in high-impedance state, and the variable power device quits work.
Described DSP microprocessor is mainly become with 8K word Flash EPROM, task manager and peripheral hardware interface group in the sheet by 554 word RAM in CPU, the sheet.
Also include PC host computer, keyboard and LED and show, described DSP microprocessor is finished serial communication function with the PC host computer with the SCI interface, and described keyboard and LED demonstration are joined with the I/O expansion interface and the SPI interface of DSP microprocessor respectively.
Be provided with electric capacity in the described power inverter with filter function and feedback energy memory function.
The present invention has been owing to adopted above technical scheme, thereby has following advantage with respect to prior art:
1, DSP microprocessor by selecting fast operation for use and recover soon, the three-phase bridge power inverter of fast-response, and various Parameter Optimization are cooperated, improved the low speed torque of AC permanent magnet synchronous motor, make it not have asynchronous electric motor starting time institute electric current present impact phenomenon.
2, improve position and current detector accuracy, thereby motor speed is controlled accurately signal sampling.
3, for different cell voltages, adopt different main circuit power original papers flexibly, improve the operational efficiency of controller, reduced the heating of controller, increased the continuation of the journey mileage of vehicle.
4, control system is stable, and main circuit is based on digital circuit, and is simple in structure, is convenient to safeguard.
5, can realize the electric energy feedback function.The energy back that when brake, deceleration or downhill running motor is produced is given battery, plays the effect of reverse charge, thereby battery is safeguarded, has prolonged the useful life of battery.
6, speed-regulating range width, control is easy to realize the torque-speed characteristics of various specific (special) requirements flexibly, also can realize the permanent torque control of AC permanent magnet synchronous motor, thereby reach energy saving purposes.
Description of drawings:
Introduce the present invention in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the control principle figure of AC permanent magnet synchronous motor controller of the present invention;
Fig. 2 is the connection line figure of incremental optical-electricity encoder among the present invention, and the circuit that only shows the A phase among the figure connects;
Fig. 3 is the current detection circuit among the present invention;
Fig. 4 is the circuit overcurrent protection among the present invention.
Embodiment:
With reference to Fig. 1, according to AC permanent magnet synchronous motor controller provided by the invention, comprise DSP microprocessor (model: TMS320F243), the variable power device, AC permanent magnet synchronous motor and position detector and current detector, position detector and current detector are used to monitor the rotor-position of AC permanent magnet synchronous motor, spinner velocity and phase current, during work, position detector is imported its detected rotor-position signal and spinner velocity signal by the QEP unit of DSP microprocessor, current detector is with the A/D translation interface input of its detected current signal by the DSP microprocessor, the DSP microprocessor is according to the rotor-position signal and the spinner velocity calculated signals set-point that goes out electric current of input, compare with the current detection value of input again, draw the width of control signal corresponding control output pwm pulse, pwm signal drives AC permanent magnet synchronous motor through the variable power device, thereby guarantees the stable of motor speed.
Described variable power device adopts three-phase inversion bridge-type structure, belongs to energy recovery type, and electric capacity therebetween has the memory function of filter function and feedback energy, thereby has improved the operational efficiency of system.When controller voltage was lower than 200V, described variable power device adopted the MOSFET inverter, and when controller voltage was higher than 200V, described variable power device adopted the IGBT inverter, thereby had realized the high efficiency control of motor.
Described position detector adopts incremental optical-electricity encoder, and it exports 3 couples of differential signal: A+, A-, B+, B-, Z+, Z-.Wherein A mutually and B phase signals quadrature judges that two signal phase differences can judge the direction of rotation of AC permanent magnet synchronous motor, and the Z phase signals is a zero signal, and every rotation 1 circle of incremental optical-electricity encoder passes through zero-bit and exports 1 pulse.Fig. 2 is an A circuitry phase connection layout, A+, A-differential signal through the anti-phase reinforcement of operational amplifier after, anti-phase, the in-phase input end of input voltage comparator respectively, through voltage ratio after, output obtains A phase significant level, this signal is directly imported the DSP microprocessor.B is mutually identical with A with the processing method of Z phase mutually, here just not repeat specification.After obtaining accurately A, B, Z input signal, DSP just can turn to judgement, position and revolution speed calculating.
Described current detector comprises Hall element, operational amplifier A, operational amplifier B and operational amplifier C.Current detection circuit as shown in Figure 3, the phase current of AC permanent magnet synchronous motor is detected by Hall element, detection signal Ju carries out exporting after the current/voltage-converted through operational amplifier A, is output as negative voltage as can be known according to the operation principle of operational amplifier.Subsequently, voltage is added to the input of operational amplifier B, and this negative voltage is carried out oppositely and the ratio amplification.Because the A/D input voltage range of microprocessor TMS320F243 is 0～3V, so the voltage of operational amplifier B output can not directly be imported DSP, also need to carry out level deviation through operational amplifier C, as shown in Figure 3, at the superposeed bias voltage of 1.5V of the in-phase input end of operational amplifier C, make output voltage range furnishing 0～3V.
The phase current overcurrent is the problem that the motor operation runs into often; it not only has influence on the normal operation of motor; high load capacity, long overcurrent also may burn out power inverter; personal safety to operating personnel constitutes a serious threat; therefore, the present invention is provided with current foldback circuit in the circuit of variable power device.As shown in Figure 4, current foldback circuit is mainly realized by an integrated voltage comparator LM393, when the motor operate as normal, FAULT holds high resistant, the positive input terminal of integrated voltage comparator LM393 (I1+) voltage is+15V, negative input end (I1-) is+7.5V that positive input terminal voltage is higher than negative input end voltage, output (O1) output high level; When machine operation during in over-current state, FAULT holds output low level, make positive input terminal (I1+) clamper of integrated voltage comparator LM393 in low level, and negative input end (I1-) still is+7.5V, positive input terminal voltage is lower than negative input end, output (O1) voltage reversal, the PWM output that triggers the DSP microprocessor is in high-impedance state, and the variable power device quits work.
Described DSP microprocessor is mainly become with 8K word Flash EPROM, task manager and peripheral hardware interface group in the sheet by 554 word RAM in CPU, the sheet.As shown in Figure 1, this controller also includes PC host computer, keyboard and LED and shows, the DSP microprocessor is finished serial communication function with the PC host computer with the SCI interface, can set with reference to given position, speed, electric current by the PC host computer, also position, speed, current feedback detection limit can be sent in real time the PC host computer shows, also can finish driven in series LED charactron Presentation Function by the SPI interface by the keyboard to set up specified rate of digital I/O expansion.
The foregoing description is only for the usefulness that the present invention is described; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be limited by each claim.
Claims (8)
1. AC permanent magnet synchronous motor controller, it is characterized in that: comprise the DSP microprocessor, the variable power device, AC permanent magnet synchronous motor and position detector and current detector, described position detector is imported the rotor-position signal and the spinner velocity signal of its detected AC permanent magnet synchronous motor by the QEP unit of DSP microprocessor, described current detector is imported the current signal of its detected AC permanent magnet synchronous motor by the A/D translation interface of DSP microprocessor, described DSP microprocessor is according to the rotor-position signal and the spinner velocity calculated signals set-point that goes out electric current of input, compare with the current detection value of input again, draw the width of control signal corresponding control output pwm pulse, pwm signal drives AC permanent magnet synchronous motor through the variable power device.
2. AC permanent magnet synchronous motor controller as claimed in claim 1, it is characterized in that: described variable power device adopts three-phase inversion bridge-type structure, when controller voltage is lower than 200V, described variable power device adopts the MOSFET inverter, when controller voltage was higher than 200V, described variable power device adopted the IGBT inverter.
3. AC permanent magnet synchronous motor controller as claimed in claim 1 or 2 is characterized in that: described position detector adopts incremental optical-electricity encoder, and it exports 3 couples of differential signal: A+, A-, B+, B-, Z+, Z-; Wherein A mutually and B phase signals quadrature judges that two signal phase differences can judge the direction of rotation of AC permanent magnet synchronous motor, and the Z phase signals is a zero signal, and every rotation 1 circle of incremental optical-electricity encoder passes through zero-bit and exports 1 pulse.
4. 3 AC permanent magnet synchronous motor controller as claimed in claim, it is characterized in that: described current detector comprises Hall element, operational amplifier A, operational amplifier B and operational amplifier C, the phase current of described AC permanent magnet synchronous motor is detected by Hall element, detection signal carries out exporting negative voltage after the current/voltage-converted through operational amplifier A, be added to the input of operational amplifier B subsequently, this negative voltage is carried out oppositely and the ratio amplification, carry out level deviation through operational amplifier C at last, make output voltage range furnishing 0～3V.
5. AC permanent magnet synchronous motor controller as claimed in claim 4, it is characterized in that: be provided with current foldback circuit in the circuit of described variable power device, described current foldback circuit is mainly realized by an integrated voltage comparator LM393, when the motor operate as normal, FAULT holds high resistant, the positive input terminal of integrated voltage comparator LM393 (I1+) voltage is higher than negative input end (I1-) voltage, output (O1) output high level; When machine operation during in over-current state, FAULT holds output low level, make positive input terminal (I1+) voltage of integrated voltage comparator LM393 be lower than negative input end (I1-) voltage, output (O1) voltage reversal, the PWM output that triggers the DSP microprocessor is in high-impedance state, and the variable power device quits work.
6. AC permanent magnet synchronous motor controller as claimed in claim 1 or 2 is characterized in that: described DSP microprocessor is mainly become with 8K word Flash EPROM, task manager and peripheral hardware interface group in the sheet by 554 word RAM in CPU, the sheet.
7. AC permanent magnet synchronous motor controller as claimed in claim 1 or 2, it is characterized in that: also include PC host computer, keyboard and LED and show, described DSP microprocessor is finished serial communication function with the PC host computer with the SCI interface, and described keyboard and LED show that respectively I/O expansion interface and the SPI interface with the DSP microprocessor joins.
8. AC permanent magnet synchronous motor controller as claimed in claim 2 is characterized in that: be provided with the electric capacity with filter function and feedback energy memory function in the described power inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910211097XA CN102064753A (en) | 2009-11-12 | 2009-11-12 | Alternating current permanent-magnet synchronous machine controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910211097XA CN102064753A (en) | 2009-11-12 | 2009-11-12 | Alternating current permanent-magnet synchronous machine controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102064753A true CN102064753A (en) | 2011-05-18 |
Family
ID=43999894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910211097XA Pending CN102064753A (en) | 2009-11-12 | 2009-11-12 | Alternating current permanent-magnet synchronous machine controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102064753A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377379A (en) * | 2011-12-13 | 2012-03-14 | 上海电气集团股份有限公司 | Drive control system of permanent magnet synchronous motor |
| CN102624315A (en) * | 2012-04-11 | 2012-08-01 | 上海三一精机有限公司 | High-precision permanent magnetic servo motor three-closed-loop control system and method |
| CN102868340A (en) * | 2012-09-06 | 2013-01-09 | 苏州朗格电动车有限公司 | Low-voltage large-current alternating-current permanent magnet driving system for small electronic vehicle |
| CN103036489A (en) * | 2012-11-30 | 2013-04-10 | 重庆长安汽车股份有限公司 | Permanent magnet synchronous motor control system |
| CN103208955A (en) * | 2013-04-24 | 2013-07-17 | 上海电机学院 | Three-phase brushless direct-current motor control device for electric vehicle |
| CN103808444A (en) * | 2014-02-14 | 2014-05-21 | 奇瑞汽车股份有限公司 | Measuring system for measuring cogging torque of permanent magnet synchronous motor |
| CN104875813A (en) * | 2015-05-26 | 2015-09-02 | 上海大学 | Electrically-driven small bionic four-leg robot |
| CN105459108A (en) * | 2015-07-31 | 2016-04-06 | 宁夏巨能机器人***有限公司 | Driving device of servo motor for robot hand and driving method for driving device |
| CN105703674A (en) * | 2014-11-11 | 2016-06-22 | 沈阳新松机器人自动化股份有限公司 | Motor synchronous sampling device |
| CN106253588A (en) * | 2016-08-31 | 2016-12-21 | 宁波汇五洲智能科技有限公司 | A kind of single motor hand controller circuit |
| CN110879550A (en) * | 2019-11-29 | 2020-03-13 | 湖北汽车工业学院 | Motor control system and CAN communication method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001245488A (en) * | 2000-02-29 | 2001-09-07 | Canon Inc | Servo controller of motor |
| CN1960161A (en) * | 2006-11-17 | 2007-05-09 | 清华大学 | Vector control system of alien frequencies power supplied permanent magnet synchronous motor |
| CN1964179A (en) * | 2005-11-07 | 2007-05-16 | 上海浩控信息技术有限公司 | A control method and device for permanently magnetic brushless motor |
| US7233125B2 (en) * | 2005-09-01 | 2007-06-19 | Stmicroelectronics, Inc. | System and method for controlling an induction motor |
| CN201231692Y (en) * | 2007-11-01 | 2009-05-06 | 上海电科电机科技有限公司 | Electric automobile driving control system |
| CN101567655A (en) * | 2008-04-24 | 2009-10-28 | 迈为电子技术（上海）有限公司 | Control method of IPM electromotor for driving electric motor car |
-
2009
- 2009-11-12 CN CN200910211097XA patent/CN102064753A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001245488A (en) * | 2000-02-29 | 2001-09-07 | Canon Inc | Servo controller of motor |
| US7233125B2 (en) * | 2005-09-01 | 2007-06-19 | Stmicroelectronics, Inc. | System and method for controlling an induction motor |
| CN1964179A (en) * | 2005-11-07 | 2007-05-16 | 上海浩控信息技术有限公司 | A control method and device for permanently magnetic brushless motor |
| CN1960161A (en) * | 2006-11-17 | 2007-05-09 | 清华大学 | Vector control system of alien frequencies power supplied permanent magnet synchronous motor |
| CN201231692Y (en) * | 2007-11-01 | 2009-05-06 | 上海电科电机科技有限公司 | Electric automobile driving control system |
| CN101567655A (en) * | 2008-04-24 | 2009-10-28 | 迈为电子技术（上海）有限公司 | Control method of IPM electromotor for driving electric motor car |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102377379A (en) * | 2011-12-13 | 2012-03-14 | 上海电气集团股份有限公司 | Drive control system of permanent magnet synchronous motor |
| CN102624315A (en) * | 2012-04-11 | 2012-08-01 | 上海三一精机有限公司 | High-precision permanent magnetic servo motor three-closed-loop control system and method |
| CN102868340A (en) * | 2012-09-06 | 2013-01-09 | 苏州朗格电动车有限公司 | Low-voltage large-current alternating-current permanent magnet driving system for small electronic vehicle |
| CN103036489A (en) * | 2012-11-30 | 2013-04-10 | 重庆长安汽车股份有限公司 | Permanent magnet synchronous motor control system |
| CN103208955A (en) * | 2013-04-24 | 2013-07-17 | 上海电机学院 | Three-phase brushless direct-current motor control device for electric vehicle |
| CN103208955B (en) * | 2013-04-24 | 2016-02-24 | 上海电机学院 | For the three-phase brushless dc motor control device of electric motor car |
| CN103808444A (en) * | 2014-02-14 | 2014-05-21 | 奇瑞汽车股份有限公司 | Measuring system for measuring cogging torque of permanent magnet synchronous motor |
| CN103808444B (en) * | 2014-02-14 | 2017-01-11 | 奇瑞新能源汽车技术有限公司 | Measuring system for measuring cogging torque of permanent magnet synchronous motor |
| CN105703674A (en) * | 2014-11-11 | 2016-06-22 | 沈阳新松机器人自动化股份有限公司 | Motor synchronous sampling device |
| CN104875813A (en) * | 2015-05-26 | 2015-09-02 | 上海大学 | Electrically-driven small bionic four-leg robot |
| CN104875813B (en) * | 2015-05-26 | 2018-04-06 | 上海大学 | A kind of electric drive small-sized bionic quadruped robot |
| CN105459108A (en) * | 2015-07-31 | 2016-04-06 | 宁夏巨能机器人***有限公司 | Driving device of servo motor for robot hand and driving method for driving device |
| CN106253588A (en) * | 2016-08-31 | 2016-12-21 | 宁波汇五洲智能科技有限公司 | A kind of single motor hand controller circuit |
| CN110879550A (en) * | 2019-11-29 | 2020-03-13 | 湖北汽车工业学院 | Motor control system and CAN communication method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102064753A (en) | Alternating current permanent-magnet synchronous machine controller | |
| CN103018541B (en) | Brshless DC motor back-emf zero cross detection circuit and detection method | |
| CN103731076B (en) | A kind of control method of electric bicycle based on permanent-magnet brushless DC electric machine | |
| CN102377380A (en) | Alternating current permanent magnet synchronous machine control system for electric vehicle | |
| CN101007510B (en) | Hybrid power automobile motor control method | |
| CN101272114B (en) | Frequency conversion control device of DC motor | |
| CN109713949B (en) | Method and system for suppressing torque ripple of brushless direct current motor | |
| CN103501146A (en) | Commutation torque ripple restraining method and system for brushless DC (Direct Current) motor driving system | |
| CN102437805A (en) | Compensation calculation method of heavy load phase of brushless direct current (DC) motor without position sensor | |
| CN205304653U (en) | Two plane type leads to fan control system based on brushless DC motor | |
| CN106602941A (en) | Control device and method for reducing commutation torque ripple of brushless direct-current motor | |
| CN206149142U (en) | Piezoelectricity vibration energy collection system based on maximum power point trails | |
| CN109150048A (en) | A kind of permanent magnet synchronous motor multiplex control system of position-sensor-free | |
| CN101814882A (en) | Position-sensor-free permasyn motor direct driving device and driving method | |
| CN103856132A (en) | Control system of alternating current servo permanent magnet synchronous motor | |
| CN107171602B (en) | A kind of PWM control method of brshless DC motor regenerative braking operation | |
| CN102957369A (en) | Brushless DC (Direct Current) motor speed regulation device on basis of DSP (Digital Signal Processor) | |
| CN201781456U (en) | Alternating-current permanent magnet synchronous motor control system for electric vehicle | |
| CN201869153U (en) | Drive controller for permanent magnet synchronous motor of electromobile | |
| CN101876239A (en) | Pumping unit system and power saving control method thereof | |
| CN204761340U (en) | Three closed -loop control dc -inverter compressors based on DSP | |
| CN102520231B (en) | Detection circuit of switch magnetic resistance motor winding voltage and detection method thereof | |
| CN101420198A (en) | Five phase DC brushless motor controller | |
| CN108282114A (en) | The control method and system of permanent magnet synchronous motor | |
| CN102299672A (en) | Direct voltage sinusoidal wave drive method for direct-current brushless motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110518 |