Motor control drive circuit with redundant isolation drive

A motor control and drive circuit technology, applied in the direction of AC motor control, control systems, electrical components, etc., can solve problems such as single-point failure products, abnormal work, etc., and achieve high reliability, high circuit performance, and good synchronization performance.

Inactive Publication Date: 2019-10-22
BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology can be realized by optocoupler isolation, magnetic coupling isolation or capacitive coupling isolation, but the application is based on a single channel to isolate the signal, and there is a single point of failure that causes the product to malfunction abnormally

Method used

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  • Motor control drive circuit with redundant isolation drive
  • Motor control drive circuit with redundant isolation drive
  • Motor control drive circuit with redundant isolation drive

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Embodiment Construction

[0029] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present invention.

[0030] Such as figure 1 , 2 , 3, a motor drive circuit with redundant isolation drive, the circuit includes a control signal dead zone protection processing circuit (101), an optocoupler isolation parallel redundant output circuit (102), a drive and a bootstrap circuit (103) and current monitoring and protection circuit (104).

[0031] The control signal dead zone protection processing circuit (101), the control chip outputs a single channel PWM wave and generates a reverse PWM wave through an inverter. The voltag...

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Abstract

The invention provides a motor control drive circuit with redundant isolation drive. PWM signals output by a control chip are processed to generate complementary PWM signals with dead zones. Each PWMsignal is output through two optical coupler isolation channels connected in parallel. The control signals output in parallel output corresponding power tube switching signals through a drive chip, sodrive control over a motor is achieved. The circuit is simple in structure, low in cost, short in response time, wide in application range and convenient for productization application.

Description

technical field [0001] The invention belongs to the field of electromechanical servo drive, and in particular relates to a motor control drive circuit with redundant isolation drive. Background technique [0002] The invention is applied to the motor control driver in the aerospace servo control system, and the control circuit and the power circuit in the motor control drive circuit need to be isolated to achieve high reliability. The existing technology can be implemented by optocoupler isolation, magnetic coupling isolation or capacitive coupling isolation, but the application is based on single-channel signal isolation, and there is a single point of failure that causes the product to malfunction abnormally. In view of the high reliability of aerospace electronic products and the need to avoid single-point failures in key links, in order to improve the reliability of electronic products, realize multi-redundant control, and reduce single-point failures, the optocoupler is...

Claims

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Application Information

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IPC IPC(8): H02P27/08
CPCH02P27/085
Inventor 张东阁林强强曲政王岩张巍岳宗帅张华
Owner BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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