Brushless DC motor speed control strategy of simulation research

Wen Xiang,Li Zhen-Qiang,Bing Xu,Yinong Chen

doi:10.1051/matecconf/201713900172

Wen Xiang, Li Zhen-Qiang + Show 2 more

Open Access

https://doi.org/10.1051/matecconf/201713900172

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Abstract

In view of the brushless DC motor speed regulation problem, an ideal control strategy is designed. Through the model and analysis of Brushless DC motor, the mathematical model of the brushless DC motor is obtained. By comparing three control strategies of PID control strategy, fuzzy control strategy and fuzzy PID control strategy, PID controller, fuzzy controller and fuzzy PID controller are designed respectively for simulation test. The simulation results show that the fuzzy PID controller has good control effect.

Highlights

The DC brushless motor is divided into two types because of the different types of its winding drive current waveforms [1]: One is the square wave permanent magnet synchronous Motor, because the armature driver current is the square wave, which is called Brushless DC Motor
In order to realize the commutation without mechanical contact, the brushless DC motor cancels the brush, and the armature winding and permanent magnet steel are placed on the stator and rotor side respectively, becoming the "DC -DC motor" mechanism
A block diagram of the system consisting of a fuzzy controller is shown in Figure 4 (b)

Summary

Introduction

The DC brushless motor is divided into two types because of the different types of its winding drive current waveforms [1]: One is the square wave permanent magnet synchronous Motor, because the armature driver current is the square wave (trapezoidal wave), which is called Brushless DC Motor. Compared with the sinusoidal permanent magnet synchronous motor, brushless DC motor has obvious superiority, feedback device is simpler, the power density is higher [2], the output torque is bigger, the control structure is simpler, make the motor and inverter fully play their own potential. Three control strategies, PID control strategy, fuzzy control strategy and fuzzy PID control strategy, are used to simulate the brushless DC motor. Fuzzy control PID control algorithm for nonlinear time-varying systems can achieve good control effect. It proves that it has better control effect

Working principle

Control strategy design

PID controller design

Reference