Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Thermal-structural coupling analysis of motor rotor under extreme variable working conditions

  • He, Lian-Ge (Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology) ;
  • Wu, Xin-Yang (Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology) ;
  • Shi, Wen-Jun (Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology) ;
  • Zhang, Bin (Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology) ;
  • Yuan, Zhou (Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology)
  • Received : 2022.02.19
  • Accepted : 2022.06.09
  • Published : 2022.10.20
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Abstract

Extreme variable working conditions were proposed, and the thermal-structural coupling analysis of the rotor was conducted with an electric drive system as the research object to make the structural strength of the rotor of a vehicle motor satisfy all operating conditions as much as possible. The overall temperature rise characteristics of the electric drive system were obtained through simulation, and the accuracy of simulation results was verified through testing. On the basis of material tests at different temperatures, the interference ft, and the rotating centrifugal force as loads, a comparative analysis of the strength of the rotor was conducted for variable working conditions and single working conditions. Results show that the stress value in the variable working condition is 74.9 MPa greater than that in the single working condition. This finding indicates that the analysis of rotor stresses under variable working conditions has more engineering importance.

Keywords

Acknowledgement

This study was supported by the Natural Science Foundation of Chongqing (Grant No. cstc2021jcyj-msxmX0440), the China Postdoctoral Science Foundation funded project (Grant No: 2019M663443), the Graduate Student Innovation Program of Chongqing University of Technology (Grant No. gzlcx2022129), the Youth Project of Science and Technology Research Program of Chongqing Education Commission of China (Grant No: KJQN201901113), the Open Foundation of Key Laboratory of Modern Measurement and Control Technology (Beijing Information Science and Technology University), Ministry of Education (Grant No. KF20211123201).

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