CN103595312A - Brushless direct current motor control device and method based on current source inverter - Google Patents
Brushless direct current motor control device and method based on current source inverter Download PDFInfo
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- CN103595312A CN103595312A CN201310524187.0A CN201310524187A CN103595312A CN 103595312 A CN103595312 A CN 103595312A CN 201310524187 A CN201310524187 A CN 201310524187A CN 103595312 A CN103595312 A CN 103595312A
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- control
- current source
- chip microcomputer
- source inverter
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Abstract
The invention discloses a brushless direct current motor control device and method based on a current source inverter. The device is composed of the current source inverter, a brushless direct current motor and a single-chip microcomputer. The three terminal output of the current source inverter is connected with a three-phase winding of the brushless direct current motor. The input terminal of the single-chip microcomputer is connected with the output terminal of Hall signals sent by the brushless direct current motor. The output terminal of the single-chip microcomputer is connected with the control terminal of a power tube of the current source inverter to control the power tube to open or close. According to the control method, three-phase inverted electromotive force is a trapezoidal wave, the width of the flat top of the trapezoidal wave is a 120-degree electric angle, three phases are symmetrical, the control current is an ideal square wave, the width of the ideal square wave is the same as the width of the flat top of the inverted electromotive force of the trapezoidal wave, the current and the inverted electromotive force are in phase to control an MOS transistor to open or close through the signal-chip microcomputer, the electromagnetic torque is basically constant, the torque pulse is small, and the requirement of the small torque pulse in the operation process of the brushless direct current motor is met.
Description
Technical field
The present invention relates to a kind of control device for brushless direct current machine and control method, relate in particular to a kind of control device for brushless direct current machine and control method based on current source inverter.
Background technology
Brshless DC motor, due to advantages such as its volume are little, performance is good, simple in structure, reliability is high, output torque is large, its application is constantly expanded, and torque pulsation is the important performance indexes of brshless DC motor.The control device of brshless DC motor is all based on voltage source inverter now, yet voltage source inverter makes brshless DC motor winding inside not stop commutation, generation current pulse during commutation, so that produced very large torque pulsation.Therefore, adopt the control device for brushless direct current machine based on current source inverter to make to be input as DC current source, reduced torque pulsation.
Summary of the invention
Object of the present invention technical problem to be solved is the defect existing for prior art, proposes a kind of control device for brushless direct current machine and control method based on current source inverter.
In order to achieve the above object, the technical scheme that technical solution problem of the present invention is taked is:
Control device for brushless direct current machine based on current source inverter, this device is by current source inverter, brshless DC motor, single-chip microcomputer forms, wherein, three end outputs of current source inverter connect three phase windings of brshless DC motor, the input of single-chip microcomputer is connected with brshless DC motor hall signal output, the opening and closing of the control end power ratio control pipe of the output termination current source inverter power tube of single-chip microcomputer, wherein, current source inverter is by direct voltage source, large inductance, three-phase bridge type converter and capacitor form, direct voltage source is connected in series large inductance and produces direct current Id, Parallel-connected Capacitor is energy of storing in load inductance when absorbing the change of current at winding two ends.
The control method of the control device for brushless direct current machine based on current source inverter, comprises the following steps:
(1) adopt brshless DC motor output hall signal;
(2) adopt single-chip microcomputer to receive described hall signal;
(3) single-chip microcomputer calculates the running status of brshless DC motor according to described hall signal;
(4) single-chip microcomputer, according to described running status, obtains answering the combination of electric conduction flow pattern inverter power pipe;
(5) adopt single-chip microcomputer output control signal, answer the combination of electric conduction flow pattern inverter power pipe open-minded described in control, control all the other current source inverter power tubes and close.
Advantage of the present invention and beneficial effect be mainly:
The present invention adopts the control device for brushless direct current machine based on current source inverter, simple in structure, and the current pulsation of DC current source input is little, and the torque pulsation in each running status of brshless DC motor is little.
Accompanying drawing explanation
Fig. 1: control device structure chart of the present invention;
Fig. 2: the induced potential of each phase winding of motor and input current figure;
Fig. 3: control method flow chart of the present invention.
Embodiment
Below in conjunction with drawings and Examples, a kind of control device for brushless direct current machine and control method based on current source inverter of the present invention is described in further detail
As shown in Figure 1, a kind of control device for brushless direct current machine based on current source inverter of the present invention, by current source inverter, brshless DC motor, single-chip microcomputer connects to form, wherein, three end outputs of current source inverter connect three phase windings of brshless DC motor, the hall signal that the input of single-chip microcomputer sends with brshless DC motor is connected, the opening and closing of the control end power ratio control pipe of the output termination power tube of single-chip microcomputer, wherein, current source inverter is by direct voltage source, large inductance, three-phase bridge type converter and capacitor form, direct voltage source is connected in series large inductance and produces DC current source Td, Parallel-connected Capacitor is energy of storing in load inductance when absorbing the change of current at winding two ends.
Be illustrated in figure 2 induced potential and the input current figure of each phase winding of motor, three-phase back electromotive force is trapezoidal wave, trapezoidal popin item width is 120 ° of electric angles, three-phase symmetrical, control electric current is ideal square wave, and wide with flat of trapezoidal wave back electromotive force, electric current and back electromotive force are with positive and negative, in a certain running status, electromagnetic torque is proportional to each phase induced electromotive force and the input current sum of products.
In conjunction with Fig. 1, Fig. 2 and Fig. 3, narrate control device for brushless direct current machine and the control method based on current source inverter of the present invention, comprise the following steps:
(1) adopt brshless DC motor output hall signal;
(2) adopt single-chip microcomputer to receive described hall signal;
(3), by described hall signal substitution table 1, obtain the running status of brshless DC motor;
Table 1
| Hall state | 001 | 101 | 100 | 110 | 010 | O11 |
| Running status | I | II | III | IV | V | VI |
(4), by described running status substitution table 2, obtain answering the combination of conducting power tube;
Table 2
| Running status | I | II | III | IV | V | VI |
| Answer the combination of conducting power tube | MOS6.MOS1 | MOS1.MOS2 | MOS2.MOS3 | MOS3.MOS4 | MOS4.MOS5 | MOS5.MOS6 |
(5) adopt single-chip microcomputer output control signal, answer the combination of conducting power tube open-minded described in control, control all the other power tubes and close.
The effect of the power tube that above-mentioned steps (4) is described is only the circulation path that changes direct current, so AC output current is square wave, and irrelevant with load impedance angle.
Above-mentioned control device for brushless direct current machine and control method based on current source inverter, according to brshless DC motor running status, opening and closing with Single-chip Controlling power tube, input dc power flow to each phase winding, electromagnetic torque substantially constant, torque pulsation is little, the little requirement of torque pulsation while reaching brshless DC motor operation.
Claims (2)
1. the control device for brushless direct current machine based on current source inverter, it is characterized in that, this device is by current source inverter, brshless DC motor, single-chip microcomputer forms, wherein, three end outputs of current source inverter connect three phase windings of brshless DC motor, the input of single-chip microcomputer is connected with brshless DC motor hall signal output, the opening and closing of the control end power ratio control pipe of the output termination current source inverter power tube of single-chip microcomputer, wherein, current source inverter is by direct voltage source, large inductance, three-phase bridge type converter and capacitor form, direct voltage source is connected in series large inductance and produces direct current Id, Parallel-connected Capacitor is energy of storing in load inductance when absorbing the change of current at winding two ends.
2. a control method for the control device for brushless direct current machine based on current source inverter as claimed in claim 1, is characterized in that, comprises the following steps:
(1) adopt brshless DC motor output hall signal;
(2) adopt single-chip microcomputer to receive described hall signal;
(3) single-chip microcomputer calculates the running status of brshless DC motor according to described hall signal;
(4) single-chip microcomputer, according to described running status, obtains answering the combination of electric conduction flow pattern inverter power pipe;
(5) adopt single-chip microcomputer output control signal, answer the combination of electric conduction flow pattern inverter power pipe open-minded described in control, control all the other current source inverter power tubes and close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310524187.0A CN103595312A (en) | 2013-10-30 | 2013-10-30 | Brushless direct current motor control device and method based on current source inverter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310524187.0A CN103595312A (en) | 2013-10-30 | 2013-10-30 | Brushless direct current motor control device and method based on current source inverter |
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| CN103595312A true CN103595312A (en) | 2014-02-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104378026A (en) * | 2014-11-24 | 2015-02-25 | 江苏科技大学 | Brushless DC motor high-speed torque pulse control device and method |
| CN105259503A (en) * | 2015-10-16 | 2016-01-20 | 沈阳兴华航空电器有限责任公司 | General brushless motor test device |
| CN105259502A (en) * | 2015-10-16 | 2016-01-20 | 沈阳兴华航空电器有限责任公司 | Brushless DC motor testing device |
| CN106533398A (en) * | 2016-09-14 | 2017-03-22 | 芯海科技（深圳）股份有限公司 | Trapezoidal wave generating circuit used for USB PD controller |
| WO2019096320A1 (en) * | 2017-11-20 | 2019-05-23 | 浙江电牛电气有限公司 | Three-phase electric power control system, converter, inverter, and power compensation device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378026A (en) * | 2014-11-24 | 2015-02-25 | 江苏科技大学 | Brushless DC motor high-speed torque pulse control device and method |
| CN104378026B (en) * | 2014-11-24 | 2017-02-01 | 江苏科技大学 | Brushless DC motor high-speed torque pulse control device and method |
| CN105259503A (en) * | 2015-10-16 | 2016-01-20 | 沈阳兴华航空电器有限责任公司 | General brushless motor test device |
| CN105259502A (en) * | 2015-10-16 | 2016-01-20 | 沈阳兴华航空电器有限责任公司 | Brushless DC motor testing device |
| CN106533398A (en) * | 2016-09-14 | 2017-03-22 | 芯海科技（深圳）股份有限公司 | Trapezoidal wave generating circuit used for USB PD controller |
| CN106533398B (en) * | 2016-09-14 | 2019-11-08 | 芯海科技（深圳）股份有限公司 | A kind of trapezoidal wave generation circuit for USB PD control device |
| WO2019096320A1 (en) * | 2017-11-20 | 2019-05-23 | 浙江电牛电气有限公司 | Three-phase electric power control system, converter, inverter, and power compensation device |
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Application publication date: 20140219 |