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

Chengtao Du, Chengling Lu (), Jie Fang, Jinzhong Zhang and Junhui Cheng
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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
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

Energies, 2025, vol. 18, issue 7, 1-17

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.

Keywords: composite cage rotor bearingless induction motor; thermal analysis; LPTN model; finite element thermal model (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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