摘  要：介绍了一种改进的无位置传感器无刷直流电机反电势转子位置检测方法，包括过零点检测方法和相位补偿方法，并在Matlab R2008a/Simulink平台中进行了仿真验证。仿真结果表明改进后的反电势过零点检测法可以消除电机中性点和阻容滤波对反电动势检测电路的影响，改进后的相位补偿方法有效且可简化程序的编写。
关键词：无刷直流电机；无位置传感器；反电动势法；仿真

Abstract: In this paper,an improved back-electromotive force(back-EMF)detection method for sensorless brushless DC motor was introduced,which included zero-crossing detection method and phase compensation method.The method was simulated on Matlab R2008a/Simulink platform.Simulation result shows that the improved zero-crossing detection method can eliminate the influence on back-EMF detection circuit from motor neutral point and RC filter,and the improved phase compensation method is effective and can simplify the program.
Key Words: BLDCM；Sensorless；Back-electromotive force method；Simulation