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Current loop control system for brushless DC motor and control method

A brushed DC motor and current loop technology, applied in control systems, motor control, current controllers, etc., can solve the problems of low scalability and complex circuit layout, and achieve the effect of high scalability and simple circuit structure

Pending Publication Date: 2018-02-09
NO 43 INST OF CHINA ELECTRONICS TECH GRP CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the circuit layout of the current closed-loop control system of current is relatively complicated, and the scalability is low.

Method used

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  • Current loop control system for brushless DC motor and control method
  • Current loop control system for brushless DC motor and control method
  • Current loop control system for brushless DC motor and control method

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Embodiment Construction

[0032] In order to further illustrate the features of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. The accompanying drawings are for reference and description only, and are not intended to limit the protection scope of the present invention.

[0033] Such as figure 1 As shown, this embodiment discloses a brushless DC motor current loop control system, including: a three-phase drive circuit 10, a current conditioning circuit 20 and a closed-loop control circuit 30;

[0034] The drive output end of the three-phase drive motor is connected to the brushless DC motor, the current output end is connected to the input end of the current conditioning circuit 20, the input end of the closed-loop control circuit 30 is connected to the output end of the current conditioning circuit 20, and the output end is connected to the three-phase The input terminal of the driving circuit 10 is connected. Wherein, the...

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PUM

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Abstract

The invention discloses a current loop control system for a brushless DC motor and a control method and belongs to the field of driven closed-loop control of DC motors. The current loop control systemcomprises a three-phase drive circuit, a current conditioning circuit and a closed-loop control circuit, wherein a drive output end of the three-phase drive circuit is connected with the brushless DCmotor, and a current output end is connected with an input end of the current conditioning circuit; and the input end of the closed-loop control circuit is connected with an output end of the currentconditioning circuit, and the output end is connected with the input end of the three-phase drive circuit. The invention further discloses a control method for the current loop control system for thebrushless DC motor. The system is simple in circuit structure and has extremely high expandability.

Description

technical field [0001] The invention relates to the technical field of DC motor drive closed-loop control, in particular to a brushless DC motor current loop control system and control method. Background technique [0002] In the field of servo systems, brushless DC motors have the advantages of high operating efficiency, low loss, and good speed regulation performance compared with ordinary motors. The driving device with closed-loop control is the core execution unit in the DC motor drive system. The current closed-loop drive is widely used in the brushless motor drive due to its characteristic of constant torque output. Its function is to process the feedback signal of the system. , to control the pulse width modulation unit through the output preference, and realize the stability control of the system output current, which has been widely used in various high-reliability areas such as aviation, aerospace, weapons, ships, and electronics. However, the circuit arrangement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/28
CPCH02P6/28H02P2205/01
Inventor 李艳哲李彩侠石冬李屹坤
Owner NO 43 INST OF CHINA ELECTRONICS TECH GRP CETC
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