CN1787356A - Monolithic apparatus PWM controller for brushless DC motor of sensor-free electrical vehicle - Google Patents
Monolithic apparatus PWM controller for brushless DC motor of sensor-free electrical vehicle Download PDFInfo
- Publication number
- CN1787356A CN1787356A CNA2005100500997A CN200510050099A CN1787356A CN 1787356 A CN1787356 A CN 1787356A CN A2005100500997 A CNA2005100500997 A CN A2005100500997A CN 200510050099 A CN200510050099 A CN 200510050099A CN 1787356 A CN1787356 A CN 1787356A
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- China
- Prior art keywords
- motor
- chip
- brushless
- stator winding
- electromotive force
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- 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.)
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
This invention relates to a PWM control device for a chip-microcomputer of a brushless DC motor of a sensor-free electromotive car including signals from three counter-EMF rotor alnico position sensors of the motor stator winding characterizing in applying the PWM technology to test the conduction relation between said signals and six power tubes to realize the phase-conversion control and the rotate speed of a brushless DC motor by controlling PWM of level signals of the chip-microcomputer control port.
Description
Technical field the invention belongs to singlechip technology in the DC MOTOR CONTROL Application for Field.
Before background technology the invention applying date, the control of attached brushless DC motor of electric vehicle is adopted internal or external A/D converter or is adopted application-specific integrated circuit (ASIC), and adopts hall element sensor, has the cost height, the defective that capacitive difference and function can't be expanded.
The purpose of summary of the invention the invention provides a kind of single-chip PWM control device (2) of brushless DC motor of sensor-free electrical vehicle.
The invention solves the technical scheme that its technical problem adopts: three rotor magnetic steel position sensor signals that comprise the back electromotive force of taking from the motor stator winding; Adopt three rotor magnetic steel position sensor signals of PWM technology and the back electromotive force by detecting the motor stator winding and the relation between 6 power tube conductings, realization commutation control, by PWM control, realize the rotating speed of brshless DC motor to Single-chip Controlling mouth level signal.Three rotor magnetic steel position sensor signals taking from the back electromotive force of motor stator winding are connected with the single-chip processor i/o input respectively, the single-chip processor i/o output is connected with the reverser input respectively, and the reverser output is connected with the control end of 6 power tubes respectively.Relation between three and 6 the power tube conductings is left among the EPROM of single-chip microcomputer with form.Single-chip microcomputer is taken from three rotor magnetic steel position sensor signal states of the back electromotive force of motor stator winding by detection, by the output control word whether the power tube conducting is controlled.
The beneficial effect of the invention is: the invention realizes the control to all kinds of brshless DC motors, and leave a plurality of interfaces for the function expansion, overcome the defective that cost height, poor compatibility, functions such as external or built-in A/D converter, application-specific integrated circuit (ASIC) controller, Hall element can't be expanded.Be widely used in the control of commutation, rotating speed and the starting current of the brshless DC motor of all kinds of electric motor cars.
Appended drawings 1 is the electrical schematic diagram of the invention.
Embodiment is consulted Fig. 1.The invention single-chip microcomputer adopts U.S. MICROCHIP company 8-bit microcontroller, and present embodiment adopts PIC16C57.Also visual expanded function adopts PIC16C67.Delivery outlet comprises that I/O (1), I/O (2), I/O (3), (4), I/O (5), I/O (6) are connected with the input of 7406 reverse swing door circuit respectively.7406 output respectively with six MOSFET power tube VF
1, VF
3, VF
5VF
2, VF
4, VF
6Control end be connected; Delivery outlet I/O (10) is connected by the input of resistance with discharge circuit LM324, and the input of discharge circuit LM324 is by capacitance-resistance device ground connection.Input I/O (7), I/O (8), I/O (9) respectively with three rotor magnetic steel position sensor signal H of the back electromotive force of taking from the motor stator winding
1, H
2, H
3Be connected.The invention realizes the rotating speed control of brshless DC motor by output level being carried out PWM control.The described PMW of the invention is the pulse width modulation controlled technology, is the turn-on and turn-off of utilizing semiconductor switch device, and direct voltage is become the potential pulse row, and the width or the cycle of control potential pulse are to reach a kind of technology of transformation or frequency conversion purpose.In the process of the normal operation of brshless DC motor, single-chip microcomputer is by the cycle of three rotor magnetic steel position sensor signals of the back electromotive force of detection motor stator winding, calculate rotating speed of motor, and with given rotating speed relatively it, as be higher than given rotating speed, then reduce output numerical value, reduce the electric current of motor, reduce the purpose that its commentaries on classics connects to reach.Otherwise, if the rotating speed that records is lower than given rotating speed, then increase output numerical value, and then the electric current of expanded motor, thereby its rotating speed improved.
Claims (3)
1, a kind of single-chip PWM control device of brushless DC motor of sensor-free electrical vehicle (2) comprises three rotor magnetic steel position sensor signals of the back electromotive force of taking from the motor stator winding; It is characterized in that adopting three rotor magnetic steel position sensor signals of PWM technology and the back electromotive force by detecting the motor stator winding and the relation between 6 power tube conductings, realization commutation control, by PWM control, realize the rotating speed of brshless DC motor to Single-chip Controlling mouth level signal.
2, the single-chip PWM control device (2) of the described brushless DC motor of sensor-free electrical vehicle of root a tree name claim 1, three rotor magnetic steel position sensor signals that it is characterized in that taking from the back electromotive force of motor stator winding are connected with the single-chip processor i/o input respectively, the single-chip processor i/o output is connected with the reverser input respectively, and the reverser output is connected with the control end of 6 power tubes respectively.
3, the single-chip PWM control device of brushless DC motor of sensor-free electrical vehicle according to claim 1 (2) is characterized in that the relation between three rotor magnetic steel position sensor signal states of three back electromotive force of taking from the motor stator winding and 6 the power tube conductings is left among the EPROM of single-chip microcomputer with form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100500997A CN1787356A (en) | 2005-06-16 | 2005-06-16 | Monolithic apparatus PWM controller for brushless DC motor of sensor-free electrical vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100500997A CN1787356A (en) | 2005-06-16 | 2005-06-16 | Monolithic apparatus PWM controller for brushless DC motor of sensor-free electrical vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1787356A true CN1787356A (en) | 2006-06-14 |
Family
ID=36784708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100500997A Pending CN1787356A (en) | 2005-06-16 | 2005-06-16 | Monolithic apparatus PWM controller for brushless DC motor of sensor-free electrical vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1787356A (en) |
-
2005
- 2005-06-16 CN CNA2005100500997A patent/CN1787356A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |