摘  要：利用反电动势估计无刷直流电机转子位置，取代传统位置传感器，可提高系统可靠性，拓宽无刷直流电机应用范围。详细介绍了各种基于反电动势的转子位置检测方法基本原理和研究现状，并比较了它们的优缺点。
关键词：无刷直流电机；反电动势；无位置传感器；综述

Abstract: To achieve sensorless control of brushless DC motors(BLDCM),rotor position is extracted from back-EMF. Traditional mechanical position sensor was replaced and this will effectively open the way for full penetration of this motor drive into high-cost, high reliability, and large volume applications. A review of the literature addressing BLDCM sensorless control based on back-EMF was provided. The advantages and disadvantages of different sensorless methods were discussed in details.
Key words: brushless DC motors (BLDCM); back-EMF; sensorless; overview