Calculation Model of Armature Reaction Magnetic Field of Interior Permanent Magnet Synchronous Motor with Segmented Skewed Poles

Yuansheng An, Conggan Ma, Nic Zhang, Yue Guo, Michele Degano, Chris Gerada, Feifei Bu, Xiangrui Yin, Qiongyao Li, Shengsen Zhou

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)
    238 Downloads (Pure)


    In an interior permanent magnet synchronous motor (IPMSM) with segmented skewed poles, the armature reaction magnetic field (AR-MF) changes nonlinearly due to the saturation of the rotor magnetic barrier. Meanwhile, this varies under different excitation currents. As a result, it is difficult to be calculated by means of analytical methods. In this paper, the calculation model of AR-MF of IPMSM is first established by vector superposition method, without considering the saturation effect of rotor and the slotting effect of stator. In the second step, the virtual magnetic field of the rotor is introduced to quantitatively calculate the influence of local inhomogeneous saturation on the AR-MF. The latter is derived by combining both the subdomain method and equivalent magnetic circuit method. The complex relative permeance is also introduced to establish the AR-MF accounting for the stator slotting effect. To validate the AR-MF calculation method proposed, an 8-pole 48-slot IPMSM with segmented skewed poles is considered as a case study, showing a comparison by both with finite element (FE) results and the electromagnetic torque measured on a test bench. The model proposed in this paper shows high accuracy and fast computation with respect to FE analysis.

    Original languageEnglish
    Pages (from-to)1115-1123
    Number of pages9
    JournalIEEE Transactions on Energy Conversion
    Issue number2
    Early online date27 Oct 2021
    Publication statusPublished - Jun 2022

    Bibliographical note

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    • Air gaps
    • armature reaction magnetic field
    • Interior permanent magnet synchronous motor
    • local inhomogeneous saturation
    • Magnetic circuits
    • Magnetic cores
    • Magnetic fields
    • Magnetic flux
    • Rotors
    • Saturation magnetization
    • segmented skewed poles
    • virtual magnetic field of rotor magnetic barrier

    ASJC Scopus subject areas

    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering


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