The influence of phase inductance harmonics on PMSM position estimation using high frequency signal injection

The phase inductance character of permanent magnet synchronous motor (PMSM) is closely related to its saliency, which has significantly influence on the position estimation using high frequency signal injection at low speed. In this paper, the relationship between phase inductance harmonics and position estimation error is discussed with qualitative and quantitative analysis, which is helpful for improving position estimation accuracy and supervising PMSM design. The validity of the analysis is verified by simulation and experiment tests.