Incremental PID control method and control device for electric steering gear

A technology of electric steering gear and control device, which is applied in the direction of DC motor rotation control, excitation or armature current control, etc., which can solve the problems of power drive module power device damage, power supply bus damage, etc., to achieve protection of power devices and operation safety high effect

Active Publication Date: 2020-04-28
XIAN MICROELECTRONICS TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Since the motor is an inductive load, it will generate a large instantaneous current during quick start and frequent commutation. When the current exceeds a certain range, it will cause damage to the power supply bus and may cause damage to the internal power devices of the power drive module.

Method used

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  • Incremental PID control method and control device for electric steering gear
  • Incremental PID control method and control device for electric steering gear

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Embodiment Construction

[0025] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] The invention provides an incremental PID control method for an electric steering gear, such as figure 1 shown, including the following steps:

[0027] Step S1, first initialize the clock and PWM pulse signal of the processor; the processor receives the control command, that is, the processor receives the expected position information for motor movement control; the processor obtains the current position information of the steering gear through the AD chip ;Then the processor outputs the PWM duty cycle variation △ according to the expected position information and the acquired position information, and sets the PWM preset limit value △` in the processor;

[0028] In step S2, the processor compares the variation Δ of the PWM duty cycle with the PWM preset limit value Δ`. When △△`, the output of PWM increases wi...

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PUM

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Abstract

The invention discloses an electric steering engine incremental PID control method and a control apparatus thereof. The control apparatus comprises a processor; a PWM signal for controlling a motor and output by the processor is subjected to isolation through a level conversion chip and then connected with a GAL device; next, the signal is output to a power driving circuit; the power driving circuit is connected with a buffer circuit; the buffer circuit is connected with a direct current motor, wherein the direct current motor feeds back position information, and the position information is collected through an AD converter to be transmitted to the processor; and meanwhile, the processor receives expected position information. By virtue of the control method and the control apparatus, current limiting on a transient state current can be realized without increasing hardware circuits, so that damage to a power supply bus can be avoided, and a power device in a driving module can be protected.

Description

technical field [0001] The invention belongs to the technical field of automatic control; in particular, it relates to an incremental PID control method and a control device for an electric steering gear. Background technique [0002] Since the motor is an inductive load, it will generate a large instantaneous current during quick start and frequent commutation. When the current exceeds a certain range, it will cause damage to the power supply bus and may cause damage to the internal power devices of the power drive module. [0003] At present, the current sensor is added to the hardware circuit to monitor the output current sampling value of the electric steering gear, and the purpose of current limiting is achieved by comparing with the set value and continuously turning on and off the power device, but the requirements for electric steering gear control are getting smaller and smaller In order to realize the miniaturization requirements of the electric steering gear, as f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P7/29H02P7/03
CPCH02P7/05H02P7/29
Inventor 支彦伟马超李涛
Owner XIAN MICROELECTRONICS TECH INST
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