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Investigation of Design Parameters for Improving Efficiency in Interior Permanent Magnet Synchronous Machines

Author

Listed:
  • Soo-Jin Lee

    (Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Republic of Korea)

  • Seok-Hyeon Eom

    (Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Republic of Korea)

  • Manh-Dung Nguyen

    (Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Republic of Korea)

  • Jun-Ho Jang

    (Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Republic of Korea)

  • Yeon-Tae Choi

    (Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Republic of Korea)

  • Dae-Hyun Lee

    (Department of Bio-Systems Machinery Engineering, Chungnam National University, Daejeon 34134, Republic of Korea)

  • Jang-Young Choi

    (Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Republic of Korea)

  • Kyung-Hun Shin

    (Department of Electrical Engineering, Changwon National University, Changwon 51140, Republic of Korea)

Abstract

This study focuses on improving the efficiency of interior permanent magnet synchronous motors (IPMSMs) for electric vehicle (EV) compressors. Seven rotor topologies (B, dB, V, dV, D, U, and UV) were first compared, among which the U-type rotor demonstrated the highest efficiency and the lowest total loss. Subsequently, the influence of the turn number and rotor outer diameter (ROD) on the shift of the high-efficiency region was analyzed, and six key design variables were identified through Pearson correlation-based sensitivity analysis. Using these variables, a multi-objective optimization was performed in Ansys OptiSLang, which improved the integrated part load value (IPLV)-weighted efficiency from 91.05% to 92.29% and shifted the high-efficiency region closer to the main operating point. Experimental validation of the reference model confirmed the reliability of the FEM analysis, and the proposed optimal design is expected to enhance low-speed efficiency and reduce battery energy consumption in EV compressor applications.

Suggested Citation

  • Soo-Jin Lee & Seok-Hyeon Eom & Manh-Dung Nguyen & Jun-Ho Jang & Yeon-Tae Choi & Dae-Hyun Lee & Jang-Young Choi & Kyung-Hun Shin, 2025. "Investigation of Design Parameters for Improving Efficiency in Interior Permanent Magnet Synchronous Machines," Energies, MDPI, vol. 18(18), pages 1-17, September.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:18:p:4971-:d:1752839
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