CN101373944B - Driver for brushless DC motor - Google Patents
Driver for brushless DC motor Download PDFInfo
- Publication number
- CN101373944B CN101373944B CN2008101250085A CN200810125008A CN101373944B CN 101373944 B CN101373944 B CN 101373944B CN 2008101250085 A CN2008101250085 A CN 2008101250085A CN 200810125008 A CN200810125008 A CN 200810125008A CN 101373944 B CN101373944 B CN 101373944B
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- motor
- brushless
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- driver
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Abstract
The invention discloses a DC brushless motor driver, which comprises a power drive circuit and a current closed-loop control circuit, and is characterized in that a microcontroller is provided; the microcontroller controls the voltage reference; the current closed-loop control circuit leads the output current of the power drive circuit to change according to the change of the voltage reference; the microcontroller is connected with the power drive circuit. The DC brushless motor driver is also characterized in that a speed closed-loop control circuit is provided; the microcontroller is connected with a rotor-position sensor arranged on a DC brushless motor. The disclosed DC brushless motor driver can realize the speed closed-loop and open-loop control, current closed-loop control and the motor rotor-position control, and also can lead the motor to rotate in a stepping manner.
Description
Technical field
What the present invention relates to is a kind of dc brushless motor that is used to drive, the driver of many dc brushless motor co-ordinations on the automatic equipment that specially refers to also relates to the field that the control of speed closed loop, rotor-position, step-by-step system drive dc brushless motor.
Background technology
In the driver of existing dc brushless motor (to call motor in the following text), the adjustable resistance of employing is regulated rotating speed, along with motor torque increase rotating speed is slack-off, can't realize velocity-stabilization.In the system multiple electric motors co-ordination is arranged, these drivers can't meet the demands.Even adopted speed-stabilizing circuit adjusted, also can't accomplish the control of the constant and angle of motor rotation speed.
Summary of the invention
In view of the deficiency that background technology exists, the technical problem to be solved in the present invention provides a kind of driver for brushless DC motor that can accurately control motor rotational angle and speed.
For this reason, the present invention takes following technical scheme to solve above-mentioned technical problem: a kind of driver for brushless DC motor, comprise power driving circuit, the current closed-loop control circuit, its feature comprises microcontroller, this microprocessor controls reference voltage, described current closed-loop control circuit changes described power driving circuit output current according to the variation of described reference voltage, and described microcontroller connects power driving circuit; Described microcontroller is connected with rotor-position sensor on being installed in dc brushless motor; The control chip that comprises dc brushless motor, described microcontroller is connected with described power driving circuit by this control chip; Have the pin that produces pwm pulse signal or digital-to-analogue conversion signal on the described microcontroller, this pin is connected with the circuit of described reference voltage; The input pin of described microcontroller is connected with the external pulse signal source; Described microcontroller, rotor-position sensor and current closed-loop control circuit constitute the speed closed loop control circuit; Described external pulse signal source is the pulse generating circuit of an adjustable frequency; The inner follow procedure of described microcontroller moves the signal that rotates, and this signal is connected with described power driving circuit; Described microcontroller connects a keyboard, can change the operating state and the running parameter of motor by this keyboard; Described microcontroller connects display circuit, and this display circuit can show the operating state and the operating rate of motor.
Among the present invention, adopt power driving circuit, the current closed-loop control circuit can be worked motor under the constant current chopper mode; Adopt microcontroller can control reference voltage; Adopt the current closed-loop control circuit power driving circuit output current to be changed to the variation of described reference voltage; Described microcontroller connects power driving circuit, makes the simpler of circuit change; Rotor-position sensor has been installed on the dc brushless motor, can have been reflected the angle and the situation of rotor; Adopt the special chip of dc brushless motor, make circuit become simpler, debug more convenient; Produce pwm pulse signal or digital-to-analogue conversion signal on the pin of employing microcontroller, this pin is connected with the circuit of described reference voltage with the pin of microcontroller and is connected with the external pulse signal source, can effectively utilize the resource of microcontroller; Adopt the speed closed loop control circuit, can control motor rotor position, angle; Adopting the external pulse signal source is the pulse generating circuit of an adjustable frequency, can make the adjustable-speed joint of motor; Adopt rotate signal and be connected with power driving circuit and make circuit simple and reliable of microcontroller inside; Adopt microcontroller to connect initialization circuit and display circuit, the operating state of motor is directly shown by display unit; The driver that the present invention can also adopt microcontroller, power driving circuit, current closed-loop control circuit, reference voltage etc. to constitute rotates motor in the mode of stepping.
Description of drawings
Further describe relevant details of the present invention below more in conjunction with the accompanying drawings.
Fig. 1 is first kind of operation principle schematic diagram of the present invention;
Fig. 2 is second kind of operation principle schematic diagram of the present invention;
Embodiment
A kind of driver for brushless DC motor, comprise power driving circuit, the current closed-loop control circuit, its feature comprises microcontroller, this microprocessor controls reference voltage, described current closed-loop control circuit changes described power driving circuit output current according to the variation of described reference voltage, and described microcontroller connects power driving circuit; Described microcontroller is connected with rotor-position sensor on being installed in dc brushless motor; The control chip that comprises dc brushless motor, described microcontroller is connected with described power driving circuit by this control chip; Have the pin that produces pwm pulse signal or digital-to-analogue conversion signal on the described microcontroller, this pin is connected with the circuit of described reference voltage; The input pin of described microcontroller is connected with the external pulse signal source; Described microcontroller, rotor-position sensor and current closed-loop control circuit constitute the speed closed loop control circuit; Described external pulse signal source is the pulse generating circuit of an adjustable frequency; The inner follow procedure of described microcontroller moves the signal that rotates, and this signal is connected with described power driving circuit; Described microcontroller connects a keyboard, can change the operating state and the running parameter of motor by this keyboard; Described microcontroller connects display circuit, and this display circuit can show the operating state and the operating rate of motor by display unit.
As shown in Figure 1, 2, keyboard is used for the parameter setting to this driver, as: set the motor speed limit, current limitation, parameters such as motor rotation speed; Display circuit shows the operating state of motor and the situation of work by display unit, as: show the motor speed limit, current limitation, parameters such as motor rotation speed; Reference voltage is by microprocessor controls; In the current closed-loop control circuit, after comparing from the voltage of the real-time current in power driving circuit sampling and described reference voltage, the power controlling drive circuit makes it electric current and reaches constant current according to reference voltage again; The speed closed loop control circuit is made up of microcontroller, rotor-position sensor and current closed-loop control circuit, and the signal that rotor-position sensor produces is delivered to the position that microcontroller can be discerned rotor.
Embodiment 1: with reference to Fig. 1, microcontroller is according to pulse (or the turn signal that self the produces) counting of outside input, and microcontroller moves the output turn signal by setup program, and microcontroller detection rotor position transducer has the back of rotation to be counted down; When count value became big, the output turn signal lagged behind, and changes reference voltage after counting down, drive current is strengthened, strengthen running speed, when count value diminishes, output signal changes to leading direction, changes reference voltage, and drive current is reduced, reduce running speed, when count value was null value, input/output pulse signal number equated, changes reference voltage, making drive current is zero, and motor stops operating and exports brake signal simultaneously.
Embodiment 2: with reference to Fig. 1, microcontroller is according to the pulse (or the turn signal that self produces) of outside input, turn signal is exported in operation by setup program, and microcontroller is regulated reference voltage according to the frequency of outside input pulse, and frequency is high more, make drive current big more, the moment of torsion of expanded motor does not detect external pulse 200 milliseconds of times, regulates reference voltage, making drive current is zero, and motor stops operating and exports brake signal simultaneously.This embodiment is suitable for the motor-driven of rotor-free sensor, with step-by-step system dc brushless motor is driven.
Embodiment 3: with reference to Fig. 2, microcontroller is according to pulse (or the turn signal that self the produces) counting of outside input, microcontroller output CRANK PULSES is given the brushless electric machine control chip, this control chip adopts the integrated circuit of MC33035 model, microcontroller detection rotor position transducer has the back of rotation to be counted down, when the count value value becomes big, and lag output signal, change reference voltage, drive current is strengthened, strengthen running speed, when count value diminishes, output signal changes to leading direction, change reference voltage, drive current is reduced, reduce running speed, when count value is null value, input/output pulse signal number equates, changes reference voltage, and making drive current is zero, motor stops operating and exports brake signal simultaneously, and this brushless electric machine control chip inside has the current closed-loop control circuit.
Three kinds of above embodiment have only described the principle of forward rotation, on an I/O pin of microcontroller, add high level or low level, be used for representing the sign of forward or reverse, counter-rotational operation principle and forward identical, motor just can have been realized positive and negative the rotation.
The present invention is on probation on the socks sewing machine, makes 4 machine operation simultaneously, and harmony is very good, and it is highly stable to work.
Claims (10)
1. driver for brushless DC motor, comprise power driving circuit, the current closed-loop control circuit, its feature comprises microcontroller, this microprocessor controls reference voltage, described current closed-loop control circuit changes described power driving circuit output current according to the variation of described reference voltage, described microcontroller connects described power driving circuit, in described current closed-loop control circuit, after comparing from the voltage of the real-time current in described power driving circuit sampling and described reference voltage, the power controlling drive circuit makes it electric current and reaches constant current according to reference voltage again.
2. according to the described driver for brushless DC motor of claim 1, the rotor-position sensor on being characterised in that described microcontroller and being installed in dc brushless motor is connected.
3. according to the described driver for brushless DC motor of claim 1, its feature also comprises the control chip of dc brushless motor, and described microcontroller is connected with described power driving circuit by this control chip.
4. according to the described driver for brushless DC motor of claim 1, feature is to have the pin that produces pwm pulse signal or digital-to-analogue conversion signal on the described microcontroller, and this pin is connected with the circuit of described reference voltage.
5. according to the described driver for brushless DC motor of claim 1, it is characterized in that the input pin of described microcontroller is connected with the external pulse signal source.
6. according to the described driver for brushless DC motor of claim 2, it is characterized in that described microcontroller, described rotor-position sensor and described current closed-loop control circuit constitute the speed closed loop control circuit.
7. according to the described driver for brushless DC motor of claim 5, it is characterized in that described external pulse signal source is the pulse generating circuit of an adjustable frequency.
8. according to the described driver for brushless DC motor of claim 1, it is characterized in that the inner follow procedure of described microcontroller moves the signal that rotates, this signal is connected with described power driving circuit.
9. according to the described driver for brushless DC motor of claim 1, it is characterized in that being connected a keyboard, can change the operating state and the running parameter of motor by this keyboard with described microcontroller.
10. according to the described driver for brushless DC motor of claim 1, it is characterized in that being connected display circuit with described microcontroller, this display circuit can show the operating state and the operating rate of motor by display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101250085A CN101373944B (en) | 2008-06-25 | 2008-06-25 | Driver for brushless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101250085A CN101373944B (en) | 2008-06-25 | 2008-06-25 | Driver for brushless DC motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101373944A CN101373944A (en) | 2009-02-25 |
| CN101373944B true CN101373944B (en) | 2011-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101250085A Expired - Fee Related CN101373944B (en) | 2008-06-25 | 2008-06-25 | Driver for brushless DC motor |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468794A (en) * | 2010-11-19 | 2012-05-23 | 许伟跃 | Position current double-closed loop controller of electric bicycle |
| CN104660122A (en) * | 2013-11-25 | 2015-05-27 | 陕西国力信息技术有限公司 | Brushless direct-current motor for single-step motion of automobile throttle valve |
| CN104660125A (en) * | 2013-11-25 | 2015-05-27 | 陕西国力信息技术有限公司 | Brushless direct-current motor for single-step motion of automobile gear selector |
| CN104242751A (en) * | 2014-08-21 | 2014-12-24 | 常州华达科捷光电仪器有限公司 | Motor control circuit for laser swinger |
| CN104806531B (en) * | 2015-03-17 | 2017-12-05 | 中国石油化工股份有限公司青岛安全工程研究院 | A kind of energy-saving oil-immersed pump and its energy-saving control method |
| CN109075727B (en) * | 2016-05-09 | 2022-07-19 | 日本电产株式会社 | Motor module and motor stepping motion control system |
| CN107681931A (en) * | 2017-10-17 | 2018-02-09 | 中国电子科技集团公司第四十三研究所 | A kind of brshless DC motor current loop control system and control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2930091Y (en) * | 2006-07-28 | 2007-08-01 | 许晓华 | High reliability DC brushless motor controller |
| CN2930090Y (en) * | 2006-07-28 | 2007-08-01 | 许晓华 | High precision Dc brushless motor controller |
| CN201230295Y (en) * | 2008-06-25 | 2009-04-29 | 何伟斌 | DC brushless motor driver |
-
2008
- 2008-06-25 CN CN2008101250085A patent/CN101373944B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2930091Y (en) * | 2006-07-28 | 2007-08-01 | 许晓华 | High reliability DC brushless motor controller |
| CN2930090Y (en) * | 2006-07-28 | 2007-08-01 | 许晓华 | High precision Dc brushless motor controller |
| CN201230295Y (en) * | 2008-06-25 | 2009-04-29 | 何伟斌 | DC brushless motor driver |
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| Publication number | Publication date |
|---|---|
| CN101373944A (en) | 2009-02-25 |
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