反电势算法的永磁同步电机无位置传感器自启动过程EMF method of permanent magnet synchronous motor without position sensor self starting proce-EMF method of permanent magnet synchronous motor without position sensor self starting process

求多次谐波，特别适用于分数槽电机反电势谐波分析-For multiple harmonics, especially suitable for fractional slot motor back emf harmonic analysis

只要检测到反电势过零点就可以得到转子的位置信号，就可以实现无刷直流电机的无位置传感器控制。(As long as the position of the rotor is detected by detecting the zero-crossing of the back-EM potential, the position sensorless control of the brushless DC motor can be realized.)