CN101764554A - Sine wave control system for dc brushless motor of electric vehicle - Google Patents
Sine wave control system for dc brushless motor of electric vehicle Download PDFInfo
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- CN101764554A CN101764554A CN201010106313A CN201010106313A CN101764554A CN 101764554 A CN101764554 A CN 101764554A CN 201010106313 A CN201010106313 A CN 201010106313A CN 201010106313 A CN201010106313 A CN 201010106313A CN 101764554 A CN101764554 A CN 101764554A
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Abstract
The invention relates to a sine wave control system for a dc brushless motor of an electric vehicle, which includes that the input end of a voltage sampling unit is connected with a microcontrol unit; a speed-regulating signal unit, a brake power-off mechanism and an external connecting device are connected in parallel, and then are connected with a current short circuit protection part in series; the current short circuit protection part is connected with the microcontrol unit; the output end of the microcontrol unit is connected with a multi-way pulse modulating unit; and a six-way pulse modulating system is connected with a multi-way field effect transistor through a multi-way drive circuit. The invention has the beneficial effects that by adopting the sine wave drive motor, the defect of square wave control can be overcome, the torque output is more stable and the efficiency is improved; by adopting the sine wave drive motor, the defect of square wave control can be overcome, and the torque sudden change is great, the shake is reduced and the noise is decreased during phase changing; and the vector control of a permasyn motor is simplified.
Description
Technical field
The present invention relates to the dc brushless motor technology, relate in particular to a kind of sine wave control system for dc brushless motor of electric vehicle.
Background technology
Adopt the vehicle of dc brushless motor at present, its control mode is square wave control.In the machine operation process, the magnetic field that motor-field and coil produce is the sinusoidal alternating transition state, uses the dc brushless motor of square wave drive sinusoidal variations physical characteristic can cause the unsettled situation of moment; At first, the magnetic direction that is positioned at deviation carries out big current drives and can cause efficient to reduce; Secondly, square wave drive is conducting each other in twos, can cause a phase coil to lower efficiency at no current state, thereby has increased the vibration of motor; At last, the moment direction of square wave drive is rotated per 60 ° of sudden changes once with motor, and a certain phase current grows out of nothing, can not very fast response, thus cause when commutation that the moment of torsion sudden change is little, situation such as commutation shake, noise are bigger.
Summary of the invention
At above defective, the purpose of this invention is to provide a kind of sine wave control system for dc brushless motor of electric vehicle that moment output is stable more, efficient improves, response is very fast, reduce to shake, reduce noise that makes, to overcome many deficiencies of bringing because of square wave control problem.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of sine wave control system for dc brushless motor of electric vehicle; comprise the voltage sample unit; the speed-regulating signal unit; the brake power cutoff mechanism; short circuit current protection part and micro-control unit; the input of described voltage sample unit connects micro-control unit; described speed-regulating signal unit; brake power cutoff mechanism and external device are connected in parallel and are connected in series with short circuit current protection part; described short circuit current protection part is connected with micro-control unit; the output of described micro-control unit connects the multiplex pulse modulating unit, and six tunnel pulse standards connect the multichannel field-effect transistor by multi-channel driver circuit.
The beneficial effect of sine wave control system for dc brushless motor of electric vehicle of the present invention is: adopt sine wave drive motor, can overcome the shortcoming of square wave control, make moment output more stable, efficient improves; Adopt sine wave drive motor, can overcome the shortcoming of square wave control, make moment output more stable, efficient improves, response is very fast, during commutation the moment of torsion sudden change big, reduce shake, reduce noise; The vector control of permagnetic synchronous motor is simplified to some extent.
Description of drawings
According to embodiment and accompanying drawing the present invention is described in further detail below.
Fig. 1 is the structural representation of the described sine wave control system for dc brushless motor of electric vehicle of the embodiment of the invention;
Fig. 2 is the short circuit current protection part schematic diagram of the described sine wave control system for dc brushless motor of electric vehicle of the embodiment of the invention.
Embodiment
As shown in Figure 1; sine wave control system for dc brushless motor of electric vehicle of the present invention; comprise voltage sample unit 1; speed-regulating signal unit 2; brake power cutoff mechanism 3; short circuit current protection part 5 and micro-control unit 6; the input of described voltage sample unit 1 connects micro-control unit 6; described speed-regulating signal unit 2; brake power cutoff mechanism 3 and external device 4 are connected in parallel and are connected in series with short circuit current protection part 5; described short circuit current protection part 5 is connected with micro-control unit 6; the output of described micro-control unit 6 connects multiplex pulse modulating unit 8 and can be set to six tunnel pulse standards, and this six tunnel pulses standard connects multichannel field-effect transistor 10 by multi-channel driver circuit 9.During work, the control power supply is through ovennodulation, convert 15V and 5V power supply to from 48V, 15V provides the drive circuit power supply, and 5V is micro-control unit 6, drive circuit and the power supply of each control section, from the 15V voltage stabilizing to 5V, adopt the 78L05 voltage-stabiliser tube, consistency height, precision are controlled in 3%, guarantee that each circuit supply is stable; Adopt the capacitance resistance ware of 1% precision, form sample circuit, voltage is carried out under-voltage protection in real time; For the vehicle handle provides 4.3V voltage, handle inside is a Hall element, along with rotational angle changes, induces voltage by magnet steel, and adjustable to 3.6V by 0.8V, default 1.3V is a cut-in voltage, reaches PWM standard-sized sheet behind the 3.2V, makes the motor full-speed operation; And voltage stops output above micro-control unit 6 behind the 3.8V, if the handle ground wire comes off, handle output will surpass 3.8V, and this moment, system did not all work, and plays the driving protective effect no matter power on or running status; External device 4 comprises burglar alarm, 1+1 power-assisted, three speed, cruises etc.; Dc brushless motor is separated by on stator 60 ° or 120 ° three Hall elements has been installed, when motor rotated, three hall sensings went out corresponding current potential, sent micro-control unit 6 to again according to the sequential and the frequency that receive, judge the phase angle of motor, the control motor normally moves; Micro-control unit 6 is according to the current signal and the hall signal that sample, its at a high speed, high-resolution and ADC with the synchronous triggering function complicated simulated environment variable of conversion fast and accurately, produce the space vector SVPWM that native system uses, a, b, the process CLARKE conversion of c three-phase current and inverse transformation, PARK conversion and inverse transformation, can can be divided into two parts to stator current, be torque current iq and exciting current id, in this vector control, make id=0 guarantee to obtain maximum output torque with minimum current amplitude; The output of No. six drive circuits through six tunnel independence amplifying circuits, obtains enough drive currents.In addition, adopt the NEC single-chip microcomputer, have very strong DSP performance and advanced Interrupt Process, various efficiently, Flash on peripheral hardware and the high-performance sheet flexibly, its intelligent flexibly pulse modulation unit array provides the control of dc brushless motor pulse modulation unit, and at a high speed, high-resolution and have the ADC of synchronous triggering function can be fast and the complicated simulated environment variable of conversion accurately, it can produce the space vector SVPWM that native system uses.
As shown in Figure 2, sine wave control system for dc brushless motor of electric vehicle of the present invention, electric current is through sampling resistor, from the CSEN sampling, amplify signal input pulse modulating unit through LM358, set current limliting, this cut-off current does not allow battery go beyond the scope heavy-current discharge can protect battery, protects the native system power tube on the other hand, heating within reason; The CSEN sampled voltage, another road process R41, the input pulse modulating unit, when short circuit of motor phase line or power tube damage, sampled voltage is elevated to certain value, and pulse modulation unit is cut off output, protects power tube or does not allow fault magnify.
Claims (1)
1. sine wave control system for dc brushless motor of electric vehicle; comprise the voltage sample unit; the speed-regulating signal unit; the brake power cutoff mechanism; short circuit current protection part and micro-control unit; it is characterized in that: the input of described voltage sample unit connects micro-control unit; described speed-regulating signal unit; brake power cutoff mechanism and external device are connected in parallel and are connected in series with short circuit current protection part; described short circuit current protection part is connected with micro-control unit; the output of described micro-control unit connects the multiplex pulse modulating unit, and six tunnel pulse standards connect the multichannel field-effect transistor by multi-channel driver circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010106313A CN101764554A (en) | 2010-02-05 | 2010-02-05 | Sine wave control system for dc brushless motor of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010106313A CN101764554A (en) | 2010-02-05 | 2010-02-05 | Sine wave control system for dc brushless motor of electric vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN101764554A true CN101764554A (en) | 2010-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010106313A Pending CN101764554A (en) | 2010-02-05 | 2010-02-05 | Sine wave control system for dc brushless motor of electric vehicle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006050A (en) * | 2010-11-15 | 2011-04-06 | 深圳市高标电子科技有限公司 | Device and method for galloping protection control of electric bicycle |
| CN103259246A (en) * | 2013-05-28 | 2013-08-21 | 南京海勇电子科技有限公司 | Circuit protector for electric vehicle |
| CN103580559A (en) * | 2012-07-25 | 2014-02-12 | 新安乃达驱动技术(上海)有限公司 | Motor controller of electric bicycle and control method thereof |
| CN105705963A (en) * | 2013-09-17 | 2016-06-22 | 株式会社电装 | Object detection device and object detection system |
-
2010
- 2010-02-05 CN CN201010106313A patent/CN101764554A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 周志敏等: "《电动自行车电气故障诊断与维修》", 31 January 2007 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006050A (en) * | 2010-11-15 | 2011-04-06 | 深圳市高标电子科技有限公司 | Device and method for galloping protection control of electric bicycle |
| CN102006050B (en) * | 2010-11-15 | 2012-08-22 | 深圳市高标电子科技有限公司 | Device and method for galloping protection control of electric bicycle |
| CN103580559A (en) * | 2012-07-25 | 2014-02-12 | 新安乃达驱动技术(上海)有限公司 | Motor controller of electric bicycle and control method thereof |
| CN103580559B (en) * | 2012-07-25 | 2017-03-15 | 新安乃达驱动技术(上海)有限公司 | The control method of the electric machine controller of electric bicycle |
| CN103259246A (en) * | 2013-05-28 | 2013-08-21 | 南京海勇电子科技有限公司 | Circuit protector for electric vehicle |
| CN103259246B (en) * | 2013-05-28 | 2016-09-07 | 南京海勇电子科技有限公司 | A kind of circuit protector for electric vehicle |
| CN105705963A (en) * | 2013-09-17 | 2016-06-22 | 株式会社电装 | Object detection device and object detection system |
| CN105705963B (en) * | 2013-09-17 | 2017-09-12 | 株式会社电装 | Article detection device and object detecting system |
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Application publication date: 20100630 |