Loss and Thermal Analysis of a High-Power-Density Permanent Magnet Starter/Generator

Xiaojun Ren (), Zhikai Chen, Rui Du and Ming Feng
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Xiaojun Ren: Fluid and Monitoring Laboratory, School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Zhikai Chen: Fluid and Monitoring Laboratory, School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Rui Du: Fluid and Monitoring Laboratory, School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China
Ming Feng: Fluid and Monitoring Laboratory, School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China

Energies, 2024, vol. 17, issue 20, 1-15

Abstract: Reducing heat and improving the overall operation stability of the motor play a key role in the design of a starting engine. This paper focuses on the loss and thermal analysis of a permanent magnet (PM) brushless machine used in starter generators. The loss of the starter generator was calculated through a combination of theoretical analysis and the finite element method. A thermal analysis model was established based on the division of the fluid domain, boundary grid, heat source setting, and so on. The temperature fields of the whole motor and the main components were calculated and analyzed. The main factors affecting the air cooling effect were analyzed, including air flow rate, air temperature, and motor speed. A prototype experimental platform of the SG motor was built. The efficiency and temperature rise in the motor were tested. The temperature values were compared with the calculated values. The experimental results show that the performance of the motor is excellent, and the error between the temperature and the design calculation is less than 10% under each load torque. The accuracy of the thermal analysis method is verified. The correctness of the motor transient model was also confirmed through a temperature rise experiment under rated conditions, providing a research basis for improving operation efficiency.

Keywords: starter generator; thermal analysis; loss analysis; permanent magnet motor (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: 2024
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