基于相电流正负序分量相角差的高精度内置式永磁同步电机转子初始位置检测方法

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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.

Key words： Interior permanent magnet synchronous motor initial rotor position high-frequency signal injection least square algorithm

Received: 29 August 2015 Published: 26 December 2016

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TM315

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	Liu Jinglin
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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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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I23/63

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