一种新型的无刷直流电机无传感器控制系统

A Novel Sensorless Control System for Brushless DC Motor

无刷直流电机因为其良好的可控性、调速性能、能耗利用率、维护方便等优点,被广泛应用于各个领域。本文首先介绍了无刷直流电机的数学模型,对无传感器的三段式启动和过零点换相技术进行分析。利用反电动势信息确定过零点,根据过零点信息来确定电机的换相时刻。提出了根据反电动势信息进行换相的无刷直流电机无传感器控制方式。设计了基于STM32的无刷直流电机控制平台。经过实验可得,本控制方案达到了带霍尔传感器无刷直流电机控制方案的效果。

Brushless DC motor (BLDC) is widely used in various fields because of its good controllability, speed regulation performance, energy consumption and maintenance convenience. This paper first introduces the mathematical model of Brushless DC motor, and analyzes the technology of sensorless three stage starting and zero crossing commutation. The zero crossing point is determined by using the back EMF information,and the commutation time of the motor is determined according to the zero crossing information. An improved brushless DC motor sensorless control method based on the back EMF information is proposed. A brushless DC motor control platform based on STM32 is designed. The experiment results show that the control scheme achieves the effect of Holzer sensor brushless DC motor control scheme.