CN203340007U - A brushless DC motor sine wave controller - Google Patents
A brushless DC motor sine wave controller Download PDFInfo
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- CN203340007U CN203340007U CN2013203385469U CN201320338546U CN203340007U CN 203340007 U CN203340007 U CN 203340007U CN 2013203385469 U CN2013203385469 U CN 2013203385469U CN 201320338546 U CN201320338546 U CN 201320338546U CN 203340007 U CN203340007 U CN 203340007U
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Abstract
The utility model relates to a brushless DC motor sine wave controller comprising a control circuit and a driving circuit. The driving circuit is a three-phase bridge inverter circuit and uses MOSFET switches. The control circuit comprises a controller MCU and a speed-regulating control circuit. The output end of the controller MCU is connected with the control ends of the MOSFET. The output signal of the controller MCU is a sine wave control signal. The output end of the speed-regulating control circuit is connected with the input end of the controller MCU. A reverse electromotive force detecting circuit is arranged between the input end of the controller MCU and the output end of the three-phase bridge inverter circuit. Compared with a conventional motor controlled by square waves, the motor has sinusoidal and continuously-changed phase current and no abrupt change of commutation current. Therefore, the motor has low operation noise. The controller has no Hall elements so as to reduce cost and has a long service life. A DSP velocity stage controller has fast arithmetic speed and is capable of fast responding and calculating the reverse electromotive force of the a high-speed motor.
Description
Technical field
The utility model relates to the sinusoidal wave controller of a kind of brshless DC motor.
Background technology
The characteristics that the existing ac motor structure of brshless DC motor is simple, reliable, have advantages of that again the DC motor speed-regulating performance is good, is all to have a wide range of applications in power traction or in servo system.It is little that brushless DC motor without position sensor has a volume, the advantages such as strong interference immunity, and development in recent years is very fast, is the development trend of following brshless DC motor control technology.Traditional brshless DC motor adopts square wave to drive, and for the brshless DC motor of imperfect trapezoidal wave back electromotive force, sine wave drive (SPWM controls or SVPWM controls) has the advantages such as the output torque pulsation is little, audible noise is low, reliable.
Summary of the invention
The purpose of this utility model is to overcome above shortcomings in prior art, provides a kind of brshless DC motor sinusoidal wave controller.
In order to realize the foregoing invention purpose, the technical solution of the utility model is: the sinusoidal wave controller of a kind of brshless DC motor, comprise control circuit and drive circuit, described drive circuit is three-phase inverter bridge circuit, and adopt MOSFET to manage switch, described control circuit comprises controller MCU and speed-regulating control circuit, described controller MCU output connects MOSFET pipe control end, the output signal of controller MCU is sinusoidal wave control signal, described speed-regulating control circuit output connects controller MCU input, be provided with counter electromotive force detection circuit between controller MCU input and three-phase inverter bridge circuit output.
The square wave back electromotive force of brshless DC motor is only square wave at air gap flux density, adopt that full square is concentrated winding, skewed slot tiltedly just can not obtain under the condition of the utmost point, but in the BLDCM of low capacity, every utmost point groove number seldom, usually adopt the number of stator slots close with the rotor number of poles, form fractional slot winding, to obtain less location torque, its back emf waveform relatively approaches sinusoidal wave, adopt this class of sine wave drive BLDCM, can realize stepless time adjustment, obtain control performance preferably.
Preferably, described controller MCU is made as DSP velocity stage controller.
Preferably, also comprise the power module to controller MCU and drive circuitry.
Preferably, be provided with voltage, current detection circuit between described controller MCU and drive circuit input.
The beneficial effects of the utility model are: control and compare with traditional square wave, electric machine phase current is sinusoidal, and changes continuously, and without the converting commutating current sudden change, so the motor running noises is low; Controller does not have Hall element, reduces costs, long service life; Adopt DSP velocity stage controller, fast operation, can respond rapidly and calculate the back electromotive force of high-speed electric expreess locomotive.
The accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of the utility model embodiment;
Fig. 2 is the driving circuit principle block diagram of the utility model embodiment.
Embodiment
Below in conjunction with concrete the drawings and specific embodiments, the utility model is described further:
As shown in Figure 1-2: the sinusoidal wave controller of a kind of brshless DC motor, comprise control circuit and drive circuit, described drive circuit is three-phase inverter bridge circuit, and adopt MOSFET to manage switch, described control circuit comprises controller MCU and speed-regulating control circuit, described controller MCU output connects MOSFET pipe control end, the output signal of controller MCU is sinusoidal wave control signal, described speed-regulating control circuit output connects controller MCU input, between controller MCU input and three-phase inverter bridge circuit output, is provided with counter electromotive force detection circuit.Described controller MCU is made as DSP velocity stage controller, also comprises the power module to controller MCU and drive circuitry, between described controller MCU and drive circuit input, is provided with voltage, current detection circuit.Voltage, current detection circuit mainly play overcurrent, overvoltage, under-voltage protection function.Can automatically detect the electric current on DC bus, if overcurrent utilizes shunt resistance to carry out overcurrent protection; During the external circuit short circuit, the whole short-circuit protection circuits of module work, the peak current while suppressing bridgc arm short and load short circuits; When supply voltage descends excessive generation when under-voltage, the soft shutoff of module MOSFET pipe, recover the supply voltage power supply after 2ms.
Described controller MCU is made as DSP velocity stage controller, described driver is by MOSFET pipe and three-phase inverter bridge circuit, power MOSFET tube adopts LUT10N60, during actual the use, can select according to demand the power electronic power devices such as power transistor GTR, turn-off thyristor GTO, insulated gate electrode pipe IGBT.Transistor is applicable to the middle low power motor, and thyristor is applicable to the relatively high power motor.
In Control System for Brushless DC based on controller MCU, the data that processing collects and transmission control command, the turned position of detection rotor, and send according to the position of rotor the currency that corresponding control word changes the SPWM signal, thereby in the change direct current motor drive circuit, the conducting of power tube order, realize the control to motor speed and rotation direction.
Claims (4)
1. the sinusoidal wave controller of a brshless DC motor, comprise control circuit and drive circuit, it is characterized in that: described drive circuit is three-phase inverter bridge circuit, and adopt MOSFET to manage switch, described control circuit comprises controller MCU and speed-regulating control circuit, described controller MCU output connects MOSFET pipe control end, the output signal of controller MCU is sinusoidal wave control signal, described speed-regulating control circuit output connects controller MCU input, between controller MCU input and three-phase inverter bridge circuit output, is provided with counter electromotive force detection circuit.
2. the sinusoidal wave controller of brshless DC motor according to claim 1, it is characterized in that: described controller MCU is made as DSP velocity stage controller.
3. the sinusoidal wave controller of brshless DC motor according to claim 1, is characterized in that: also comprise the power module to controller MCU and drive circuitry.
4. the sinusoidal wave controller of brshless DC motor according to claim 1, is characterized in that: between described controller MCU and drive circuit input, be provided with voltage, current detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203385469U CN203340007U (en) | 2013-06-14 | 2013-06-14 | A brushless DC motor sine wave controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203385469U CN203340007U (en) | 2013-06-14 | 2013-06-14 | A brushless DC motor sine wave controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203340007U true CN203340007U (en) | 2013-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203385469U Expired - Fee Related CN203340007U (en) | 2013-06-14 | 2013-06-14 | A brushless DC motor sine wave controller |
Country Status (1)
| Country | Link |
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| CN (1) | CN203340007U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106274494A (en) * | 2015-06-02 | 2017-01-04 | 捷沃智能科技（苏州）有限公司 | The liquid crystal instrument electric-control system of folding electric sliding plate car |
-
2013
- 2013-06-14 CN CN2013203385469U patent/CN203340007U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106274494A (en) * | 2015-06-02 | 2017-01-04 | 捷沃智能科技（苏州）有限公司 | The liquid crystal instrument electric-control system of folding electric sliding plate car |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 Termination date: 20150614 |
|
| EXPY | Termination of patent right or utility model |