摘  要：目前应用于无传感器BLDCM的控制方法都是采用位置检测电路来间接获得转子位置信息，实现对BLDCM的控制。该文提出一种可以省掉位置检测电路的基于反电势滤波的方法，可以准确获得反电势过零点，驱动BLDCM平稳运行。基于TMS320LF2407A的控制平台进行实验，结果证明了该方法的有效性。
关键词：反电动势滤波；无刷直流电机；无传感器控制；数字信号处理器（DSP）

Abstract: In order to detect the rotor position of the sensorless brushless DC motor(BLDCM),circuit of rotor position detection was used generally.This paper propound a BLDCM control algorithm,it could preclude the need for circuit of rotor position detection,implemented using the digital signal processor(DSP)TMS320LF2407A.The algorithm works by digitally filtering the back-electromotive force (back-EMF) on each phase of the motor and can identify the zero-cross event accurately and determining when to commutate the motor windings based on the filtered back-EMF signals.The experimental result demonstrates the proposed control method provides desirable performance.
Key Words:Back-electromotive force filtering；Brushless DC motor；Sensorless control；Digital signal processor(DSP)