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Motor control system and control method thereof

A motor control and motor drive technology, applied in control systems, DC motor speed/torque control, excitation or armature current control, etc., and can solve problems such as difficulty in sampling back EMF

Inactive Publication Date: 2020-04-17
SAIC MOTOR +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method that can not only adapt to the traditional low-frequency control of the motor, but also solve the problem of difficult sampling of the back EMF of the high-frequency control of the motor, so that the motor control is no longer limited by the sampling frequency and duty cycle of the back EMF. motor control system

Method used

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  • Motor control system and control method thereof
  • Motor control system and control method thereof
  • Motor control system and control method thereof

Examples

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no. 1 example

[0074] refer to image 3 As shown, the first embodiment of the motor control system provided by the present invention includes:

[0075] A motor drive module, which is adapted to output the motor drive voltage according to the motor control voltage output by the motor model module and the sampling time;

[0076] A motor model module, which is suitable for calculating the required motor control voltage and sampling interruption time according to the actual speed of the motor and the actual current of the motor;

[0077] And, it is suitable for calculating and obtaining the actual motor speed and motor actual current according to the motor control voltage, load torque and motor sampling back EMF;

[0078] The motor control module is suitable for outputting a back EMF sampling interrupt signal to the motor drive module and the back EMF sampling module every Twork+Tbreak time. When receiving the back EMF sampling interrupt signal, the motor drive module stops outputting the motor...

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Abstract

The invention discloses a motor control system comprising a motor driving module which outputs motor driving voltage; and a motor model module which calculates the actual rotating speed and the actualcurrent of the motor according to the target rotating speed, and calculates the required motor control voltage and sampling interruption time according to the actual rotating speed and calculates toobtain the actual rotating speed and the actual current of the motor according to the motor control voltage, the load torque and the motor sampling counter electromotive force. The motor control module outputs a counter electromotive force sampling interruption signal to the motor driving module and the counter electromotive force sampling module at intervals of Twork + Tbreak time, stops outputting motor driving voltage when receiving the counter electromotive force sampling interruption signal and lasts for Tbreak time; and when the counter electromotive force sampling interruption signal isoutputted, the counter electromotive force sampling module performs motor voltage sampling after timing Twait time. The invention also discloses a motor control method. The motor control is no longerlimited by the counter electromotive force sampling frequency and the duty ratio.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a motor control system for a DC brushed motor of a vehicle body stabilization system. The invention also relates to a motor control method for a DC brushed motor of a vehicle body stabilization system. Background technique [0002] The body stabilization system (ESC) is composed of a controller, a valve block, and a motor. There are two oil inlets on the valve block, which communicate with the two chambers of the brake master cylinder respectively, and four oil outlets, respectively connected with the four chambers of the brake master cylinder. Brake wheel cylinder connection of the wheel, refer to figure 1 shown. The main working principle of the vehicle stability system (ESC) is to judge the vehicle stability based on driver input (brake pedal, steering wheel angle) and sensor signals (master cylinder pressure, wheel speed, acceleration, yaw rate). In the unstable state, the ESC r...

Claims

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Application Information

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IPC IPC(8): H02P7/29B60T8/1755
CPCB60T8/1755H02P7/2913
Inventor 李运生邓海燕陈晶杰田丰
Owner SAIC MOTOR
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