基于高频注入信号瞬时频率估计的永磁同步电机转子位置检测

摘要

Precise location of rotor is needed in either vector or direct torque control systems for PMSM.This paper explores the method of instantaneous frequency for detecting correct location-contained signal from the feedback high frequency signals injected to the Permanent Magnet Synchronous Motor（PMSM）.The method uses the short time Fourtier transform to estimate rotor position by extracting the peak value of spectrogram and its associated frequency.%在永磁同步电机的控制中,无论是矢量控制还是直接转矩控制,都需要适时精确知道转子位置的信息。本文探索性地提出基于信号瞬时频率估计的方法,对永磁同步电机的高频电流响应信号进行检测和处理,通过提取谱图的峰值和相关的频率来估算出实际的瞬时频率,进而获得正确的转子位置信息。