Strength analysis and design of high speed interior permanent magnet rotor

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Journal Article
Dianji yu Kongzhi Xuebao/Electric Machines and Control, 2017, 21 (12), pp. 43 - 50
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© 2017, Harbin University of Science and Technology Publication. All right reserved. In order to solve the problem of high speed centrifugal force, the rotor strength is analyzed for the design of interior permanent magnet rotor. Based on the principle of rotor centrifugal force, the analytical formula of rotor strength was deduced. The correctness of analytical calculation was verified by finite element method. In order to improve the mechanical reliability of the rotor, the rotor segment structure was adopted. The extra magnetic rib can disperse the centrifugal force of rotor. Also, the effect of rib number and size on the strength and leakage performance was analyzed by finite element method. The design rules of the segmented rotor were summarized. Based on the analysis of rotor strength and electromagnetic, a high speed interior permanent magnet rotor with rated power of 15 kW and maximum speed of 30000 r/min was designed and tested. It provides references for the design of high speed interior permanent magnet rotor.
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