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A general brushless motor current closed-loop control system and control method

A brushless motor and control system technology, applied in the field of servo control, can solve problems such as complex control methods of brushless motors, and achieve low cost, flexible and convenient use

Active Publication Date: 2017-05-10
CNGC INST NO 206 OF CHINA ARMS IND GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with driving brushless motors and driving DC motors, the control of DC motors is relatively simple, while brushless motors are relatively complicated due to their control methods

Method used

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  • A general brushless motor current closed-loop control system and control method
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  • A general brushless motor current closed-loop control system and control method

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Embodiment Construction

[0031] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0032] System design parameters: maximum power supply voltage Udc=80V, continuous output current 30A, current closed-loop system capable of four-quadrant DC brushless motor operation.

[0033] UC3637 is a dedicated motor PWM control chip, used for DC motor drive PWM controller. Only a few components need to be added around it to generate PWM waveform. The internal circuit diagram is shown in the figure: It can be seen from the figure that there are two switches controlled by the flip-flop inside the chip, which are respectively connected to two controlled current sources. When we apply different voltages on pin 1 and pin 3, connect a resistor to a certain level on pin 18, and connect a capacitor to another level on pin 2, we can get linearity on pin 2 Good triangle wave. The frequency of the triangle wave depends on the voltage difference between pin 1 and pin...

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Abstract

The invention relates to a general brushless motor current closed-loop control system and method. According to a medium and small power brushless direct current motor control system, a CPLD EPM570 and a direct current motor control chip UC3637 are adopted, a novel current loop control interface circuit of a brushless direct current motor is designed, motor four-quadrant operation control is achieved, and meanwhile the circuit further has the external parallel communication control function and the complete out-of-control protection strategy. An ir4361 module in a foreign MSK company can achieve the operation control over the current loop four quadrants of the brushless direct current motor, and the general brushless motor current closed-loop control system can completely replace the ir4361 of the MSK company. A general hardware platform for brushless motor current closed-loop control is provided to be used as a hardware interface circuit module, and a speed loop and a position loop are additionally arranged, so that three-closed-loop servo system control of the brushless motor is directly achieved, and using is flexible and convenient. The ir4361 of the MSK company can be completely replaced, the cost is low, and great significance is achieved to the localization of military devices.

Description

technical field [0001] The invention belongs to the field of servo control, and in particular relates to a current closed-loop control system and a control method of a general-purpose brushless motor. Background technique [0002] The permanent magnet brushless DC motor is a new type of electromechanical integrated motor that has been developed rapidly in recent years with the development of power electronics technology, control technology and new permanent magnet materials. It not only has the advantages of simple structure, reliable operation, and convenient maintenance of AC motors, but also has the excellent speed regulation performance of DC motors. At present, it has been widely used in speed regulation and servo system. [0003] MSK's ir4361 module is a general-purpose brushless DC motor control module. It is characterized by simple interface, convenient use, and perfect protection function. It has been widely used in many servo system projects (especially in the fie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/28
CPCH02H7/0833H02P6/08
Inventor 胡卫鹏周勇军张翔
Owner CNGC INST NO 206 OF CHINA ARMS IND GRP
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