CN2819635Y - Monolithic device PWM controller of brushless DC motor for electric vehicle without sensor - Google Patents
Monolithic device PWM controller of brushless DC motor for electric vehicle without sensor Download PDFInfo
- Publication number
- CN2819635Y CN2819635Y CNU2005201029874U CN200520102987U CN2819635Y CN 2819635 Y CN2819635 Y CN 2819635Y CN U2005201029874 U CNU2005201029874 U CN U2005201029874U CN 200520102987 U CN200520102987 U CN 200520102987U CN 2819635 Y CN2819635 Y CN 2819635Y
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- Prior art keywords
- utility
- motor
- model
- control
- position sensor
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Abstract
The utility model relates to a monolithic computer PWM controller for a brushless direct current motor of an electric vehicle without a sensor. The utility model belongs to the application of monolithic computer technique in the field of direct current motors. The utility model comprises three rotor magnetic steel position sensor signals of a counter-electromotive force from a motor stator winding. The utility model is characterized in that by adopting PWM technique, the control of phase change can be realized through detecting the relation between the three rotors magnetic steel position sensor signals of the counter-electromotive force of the motor stator winding and six power tubes. The rotation speed of a brushless direct current motor can be realized through the PWM control of an electric level signal of a monolithic computer control opening. The utility model can realize the control of the phase change, the rotation speed and the starting current of various brushless direct current motors through the PWM control. The utility model omits a hall element of a position sensor, so the structure of the motor is reasonable, and the cost for control is saved simultaneously. The utility model overcomes defect that an external A/D converter, a built-in A/D converter, the hall element and a special integrated circuit controller has high cost, poor compatibility and no function extending ability.
Description
Technical field the invention belongs to the monolithic processor control device of attached brushless DC motor of electric vehicle, the single-chip PWM control device of brushless DC motor of sensor-free electrical vehicle
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.
Certainly the single-chip PWM control device that provides a kind of brushless DC motor of sensor-free electrical vehicle of summary of the invention the invention.
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 reverser and NOR gate input respectively, and reverser output AND 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) are connected with the input of 7406 reverse swing door circuit.7406 output respectively with three MOSFET power tube VF
1, VF
3, VF
5Control end be connected; Delivery outlet comprises that the input of I/O (4), I/O (5), I/O (6) AND 74LS33 is connected; Three inputs of delivery outlet I/O (10) AND 74LS33 are connected; Three outputs of NOR gate 74LS33 respectively with three MOSFET power tube VF
2, VF
4, VF
6Control end be connected.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 (1)
1, a kind of single-chip PWM control device of brushless DC motor of sensor-free electrical vehicle comprises the rotor magnetic steel position transducer; It is characterized in that three rotor magnetic steel position sensor signals with the connected mode of 6 power tubes are: 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 reverser and NOR gate input respectively, and reverser output AND output is connected with the control end of 6 power tubes respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201029874U CN2819635Y (en) | 2005-06-16 | 2005-06-16 | Monolithic device PWM controller of brushless DC motor for electric vehicle without sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005201029874U CN2819635Y (en) | 2005-06-16 | 2005-06-16 | Monolithic device PWM controller of brushless DC motor for electric vehicle without sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2819635Y true CN2819635Y (en) | 2006-09-20 |
Family
ID=37005696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005201029874U Expired - Fee Related CN2819635Y (en) | 2005-06-16 | 2005-06-16 | Monolithic device PWM controller of brushless DC motor for electric vehicle without sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2819635Y (en) |
-
2005
- 2005-06-16 CN CNU2005201029874U patent/CN2819635Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |