CN2819634Y - Brushless DC motor controller of electric vehicle without sensor for built-in digital-analog converter - Google Patents
Brushless DC motor controller of electric vehicle without sensor for built-in digital-analog converter Download PDFInfo
- Publication number
- CN2819634Y CN2819634Y CNU200520102986XU CN200520102986U CN2819634Y CN 2819634 Y CN2819634 Y CN 2819634Y CN U200520102986X U CNU200520102986X U CN U200520102986XU CN 200520102986 U CN200520102986 U CN 200520102986U CN 2819634 Y CN2819634 Y CN 2819634Y
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- Prior art keywords
- control
- converter
- built
- motor
- electric vehicle
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Abstract
A kind of sensor-free electric vehicle brushless DC machine control device of built-in D/A converter belongs to singlechip technology in the DC MOTOR CONTROL Application for Field.Comprise the single-chip microcomputer of being with A/D converter and take from three rotor magnetic steel position sensor signals of the back electromotive force of motor stator winding.It is characterized in that the detection by the back electromotive force of motor stator winding, the commutation speed governing of control brshless DC motor by the output level of control discharge circuit, realizes the restriction of starting current; By controlling built-in D/A output voltage, realize the control of rotating speed.The utility model is removed the position transducer Hall element from, makes electric machine structure more reasonable, saves simultaneously and controls cost.The utility model is realized the control to all kinds of brshless DC motors, and leaves a plurality of interfaces for the function expansion, has overcome the defective that external A/D converter, Hall element and application-specific integrated circuit (ASIC) controller cost height, poor compatibility, function can't be expanded.
Description
Technical field the invention belongs to singlechip technology in the DC MOTOR CONTROL Application for Field.
Before background technology the invention applying date, externally arranged D/A converter, Hall element and application-specific integrated circuit (ASIC) are adopted in the control of attached brushless DC motor of electric vehicle, but the defective that exists cost highly compatible difference and function to expand.
Certainly the sensor-free electric vehicle brushless DC machine control device that provides a kind of built-in D/A converter of summary of the invention the invention.
The invention solves the technical scheme that its technical problem adopts: comprise the single-chip microcomputer of being with A/D converter and take from three rotor magnetic steel position sensor signals of the back electromotive force of motor stator winding; By the measurement to the back electromotive force of motor stator winding, the commutation speed governing of control brshless DC motor by the output level of control discharge circuit, realizes the restriction of starting current; By controlling the output voltage of built-in D/A, realize the control of rotating speed.Three rotor magnetic steel position sensor signals of exempting from Hall element are connected with the single-chip processor i/o input respectively; The single-chip processor i/o output is connected with discharge circuit with the reverse swing door circuit respectively, and the output of reverse swing door circuit is connected with 6 power tube control ends respectively, and built-in A/D converter is connected with the operational amplifier input.Relation between the state of three rotor magnetic steel position sensor signals of exempting from Hall element and 6 the power tube conductings is left among the EPROM of single-chip microcomputer with form.Whether single-chip microcomputer is controlled the power tube conducting by the output control word by detection rotor magnet steel position sensor signal.
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 function expansion, overcome the defective that external A/D converter, Hall element and application-specific integrated circuit (ASIC) controller cost height, poor compatibility, function 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 the single-chip microcomputer PIC16C711 of built-in four road A/D modular converters.Delivery outlet comprises I/O (1), I/O (2), I/O (3), I/O (4), I/O (5), I/O (6), and the input with 7406 reverse swing door circuit is connected respectively.7406 output is six MOSFET power tube VF respectively
1, VF
2, VF
3, VF
4, VF
5, VF
6Control end be connected; The input port comprises I/O (7), I/O (8), I/O (9), respectively with three rotor magnetic steel position sensor signal H that are with Hall elements
1, H
2, H
3Be connected.Delivery outlet comprises that I/O (10) is connected with an input of LM324 operational amplifier.The invention detects the rotor magnetic steel position sensor signals of three band Hall elements by single-chip microcomputer, and by i.e. three the rotor magnetic steel position sensor signal H of the commutation table among the EPROM that leaves single-chip microcomputer with form in
1, H
2, H
3State and 6 power tube VF
1, VF
2, VF
3, VF
4, VF
5, VF
6Relation between the conducting, by the control word that delivery outlet is sent, difference conducting VF
1, VF
2VF
2, VF
3VF
3, VF
4VF
4, VF
5VF
5, VF
6VF
6, VF
1Promptly realize the commutation of brshless DC motor.In the process of the normal operation of brshless DC motor, by controlling the output voltage of built-in D/A, i.e. the electric current of may command brshless DC motor, and then control rotating speed of motor.Single-chip microcomputer calculates rotating speed of motor by the cycle from the rotor-position sensor signal, and it is compared with given rotating speed, as is higher than given rotating speed, then reduces output numerical value, reduces the electric current of motor, reduces 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 sensor-free electric vehicle brushless DC machine control device of built-in D/A converter comprises single-chip microcomputer and the rotor magnetic steel position transducer of being with A/D converter; 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 discharge circuit with the reverse swing door circuit respectively, the output of reverse swing door circuit is connected with the control end of 6 power tubes respectively, and built-in A/D converter is connected with the operational amplifier input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200520102986XU CN2819634Y (en) | 2005-06-16 | 2005-06-16 | Brushless DC motor controller of electric vehicle without sensor for built-in digital-analog converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200520102986XU CN2819634Y (en) | 2005-06-16 | 2005-06-16 | Brushless DC motor controller of electric vehicle without sensor for built-in digital-analog converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2819634Y true CN2819634Y (en) | 2006-09-20 |
Family
ID=37005695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200520102986XU Expired - Fee Related CN2819634Y (en) | 2005-06-16 | 2005-06-16 | Brushless DC motor controller of electric vehicle without sensor for built-in digital-analog converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2819634Y (en) |
-
2005
- 2005-06-16 CN CNU200520102986XU patent/CN2819634Y/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 |