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A Combined LPTN-FETM Approach for Dual-Mode Thermal Analysis of Composite Cage Rotor Bearingless Induction Motor (CCR-BIM) with Experimental Verification

Author

Listed:
  • Chengtao Du

    (School of Electrical and Photoelectric Engineering, West Anhui University, Lu’An 237012, China)

  • Chengling Lu

    (School of Electrical and Photoelectric Engineering, West Anhui University, Lu’An 237012, China
    School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China)

  • Jie Fang

    (School of Electrical and Photoelectric Engineering, West Anhui University, Lu’An 237012, China)

  • Jinzhong Zhang

    (School of Electrical and Photoelectric Engineering, West Anhui University, Lu’An 237012, China)

  • Junhui Cheng

    (School of Electrical and Photoelectric Engineering, West Anhui University, Lu’An 237012, China)

Abstract

This paper proposes a dual-mode thermal analysis framework for the composite cage rotor bearingless induction motor (CCR-BIM), which combines lumped parameter thermal network (LPTN) and finite element thermal model (FETM) methods with experimental verification. The CCR-BIM, an advanced motor design combining torque and suspension windings within a single stator core, offers significant advantages in high-speed and high-precision applications. However, accurate thermal management remains a critical challenge due to its complex structure and increased losses. An LPTN model tailored to the unique thermal characteristics of the CCR-BIM is proposed, and detailed FETM simulations and experimental tests are validated. The LPTN model employs a meshing method to discretize the motor into orthogonal thermal nodes, enabling the rapid and accurate calculation of steady-state temperatures. The FETM further verifies the LPTN results by simulating the transient and steady-state temperature fields. Experimental validation using a 2 kW CCR-BIM test platform confirms the effectiveness of both models, with temperature predictions closely matching measured values. This study provides a reliable thermal analysis method for CCR-BIM.

Suggested Citation

  • Chengtao Du & Chengling Lu & Jie Fang & Jinzhong Zhang & Junhui Cheng, 2025. "A Combined LPTN-FETM Approach for Dual-Mode Thermal Analysis of Composite Cage Rotor Bearingless Induction Motor (CCR-BIM) with Experimental Verification," Energies, MDPI, vol. 18(7), pages 1-17, April.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:7:p:1816-:d:1627768
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