Diagnosing and distinguishing rotor eccentricity from partial demagnetisation of interior PMSM based on fluctuation of high-frequency d-axis inductance and rotor flux

An appropriate and complete mathematical modelling approach is developed for an interior permanent magnet synchronous motor (PMSM) with general eccentricity. The relationships between air-gap eccentricity and simulated inductances in different coordinate frames are analysed in depth. Then, an analytical high-frequency inductance model of the interior PMSM with rotor eccentricity is developed. Base...