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Double-closed-loop direct current motor control circuit

A technology for controlling circuits and DC motors, applied in the direction of DC motor rotation control, excitation or armature current control, etc., which can solve problems such as high energy consumption, low control accuracy, and high requirements for chip computing capabilities

Pending Publication Date: 2018-06-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, single closed-loop control is adopted, which consumes a lot of energy, has low control precision, and requires high computing power of the chip. Therefore, it is necessary to provide a new DC motor control circuit.

Method used

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  • Double-closed-loop direct current motor control circuit

Examples

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Embodiment 1

[0017] Embodiment 1: as figure 1 As shown, a double-closed-loop DC motor control circuit includes an uncontrollable rectification circuit 1, a speed setting and proportional integral circuit 2, a current loop proportional integral circuit 3, a motor H-bridge control circuit 4, and a high-power thyristor drive circuit 5 , PWM generating circuit 6; the speed setting and proportional integral circuit 2, current loop proportional integral circuit 3, PWM generating circuit 6, high-power thyristor drive circuit 5, motor H-bridge control circuit 4 are connected in sequence, uncontrollable rectification The circuit 1 is connected with the motor H bridge control circuit 4;

[0018] The uncontrollable rectification circuit 1 includes connection terminals L1, L2, L3, single-pole three-throw switch Q, diodes VD1, VD2, VD3, VD4, VD5, VD6, and capacitor C1; The throw switch is respectively connected to the anodes of diodes VD3, VD2, VD1, meanwhile, the anodes of diodes VD3, VD2, VD1 are re...

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Abstract

The invention relates to a double-closed-loop direct current motor control circuit, and belongs to the field of motor control. The double-closed-loop direct current motor control circuit comprises anuncontrollable rectifying circuit, a revolving speed setting and proportional-integral circuit, a current loop proportional-integral circuit, a motor H bridge control circuit, a high-power thyristor drive circuit and a PWM generating circuit. The revolving speed setting and proportional-integral circuit, the current loop proportional-integral circuit, the PWM generating circuit, the high-power thyristor drive circuit and the motor H bridge control circuit are sequentially connected, and the uncontrollable rectifying circuit and the motor H bridge control circuit are connected. Through samplingfeedback of the revolving speed and currents of a motor, the revolving speed loop and current loop double-closed-loop control circuit is used for controlling the direct current motor, the control difficulty of a control chip is greatly lowered, the control precision is improved while energy consumption is reduced by means of double-closed-loop control, and therefore the requirement on the operating speed of the chip is also reduced.

Description

technical field [0001] The invention relates to a double-closed-loop DC motor control circuit, which belongs to the field of motor control. Background technique [0002] At present, DC motors are widely used. A DC motor is a device that can convert electrical energy into kinetic energy. The motor itself can run forward and reverse, but it needs the support of a control circuit, that is, it has the ability to reverse the current. When the DC motor is working normally, the control chip needs to control the starting speed, that is, the time for the motor to reach a steady state, control the running speed of the motor, that is, the speed of the motor, control the forward rotation and reverse rotation of the motor, and at the same time control the movement of the motor. planning. Generally, single closed-loop control is adopted, which consumes a lot of energy, has low control precision, and requires high computing power of the chip. Therefore, a new DC motor control circuit need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/28H02P7/03
CPCH02P7/03H02P7/28
Inventor 李恒谭洁张国银赵磊刘昌昊陈宝明母德浪
Owner KUNMING UNIV OF SCI & TECH
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