Abstract On the basis of the research on static initial position detection technology of interior permanent magnet synchronous motor (IPMSM),a new high-precision method based on high-frequency signal injection is suggested.In the proposed method,a high-frequency rotating voltage was superimposed in the control voltage first,then the high-frequency current component was obtained by band-pass filtering of the three-phase current signal,and the positive and negative sequence components of high-frequency current response were separated by using synchronous rotating coordinate transformation,the phase of positive and negative sequence components of the three-phase high-frequency current response was extracted by the least square algorithm,the rotor position was obtained by using the difference of arbitrary phase current of positive and negative sequence components phase.Finally the NS poles was distinguished by using motor magnetic saturation effect.The method has high-precision detection accuracy,and the average detection error is about 1.73 degrees (electric angle).The experimental results show the correctness of the proposed method.
Liu Jinglin,Lu Jiadong. High-Precision Estimation Method of Initial Rotor Position for IPMSM Based on Phase Difference of Positive and Negative Sequence Current Component[J]. Transactions of China Electrotechnical Society, 2016, 31(23): 63-69.
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2016, Vol. 31 
