Evaluation of applying retaining shield rotor for high-speed interior permanent magnet motors

Jiancheng Zhang, Wei Chen, Xiaoyan Huang, Youtong Fang, Jian Zhang, Jien Ma, Wen Cao

Research output: Contribution to journalArticlepeer-review


This paper proposes a novel rotor structure for high-speed interior permanent magnet motors to overcome huge centrifugal forces under high-speed operation. Instead of the conventional axial stacking of silicon-steel laminations, the retaining shield rotor is inter-stacked by high-strength stainless-steel plates to enhance the rotor strength against the huge centrifugal force. Both mechanical characteristics and electromagnetic behaviors of the retaining shield rotor are analyzed using finite-element method in this paper. Prototypes and experimental results are demonstrated to evaluate the performance. The analysis and test results show that the proposed retaining shield rotor could effectively enhance the rotor strength without a significant impact on the electromagnetic performance, while some design constraints should be compromised.
Original languageEnglish
Article number8100404
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number3
Publication statusPublished - Mar 2015

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  • finite-element method
  • high-speed interior permanent magnet motor
  • mechanical analysis
  • retaining shelf rotor


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