Performance Analysis and Optimization of Power Density Enhanced PMSM with Magnetic Stripe on Rotor

Wenlong Wei, Jinping Zhang, Jin Yao, Siqi Tang and Shiyou Zhang
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Wenlong Wei: School of Mechanical Engineering, Sichuan University, Chengdu 610065, China
Jinping Zhang: School of Mechanical Engineering, Sichuan University, Chengdu 610065, China
Jin Yao: School of Mechanical Engineering, Sichuan University, Chengdu 610065, China
Siqi Tang: School of Mechanical Engineering, Sichuan University, Chengdu 610065, China
Shiyou Zhang: School of Mechanical Engineering, Sichuan University, Chengdu 610065, China

Energies, 2020, vol. 13, issue 17, 1-14

Abstract: A permanent magnet synchronous motor (PMSM) has advantages in applications such as electric vehicles and all-electric-aircraft because of its inherent characteristics of high power density. In order to further improve its power density, this paper proposes a novel rotor structure with a magnetic stripe, based on the “dual stator + Halbach array” topology of the PMSM, which leads to a PMSM with greater power density. Then, this paper proposes characteristic parameters such as the external air gap proportional coefficient K 1 and the internal air gap proportional coefficient K 2 of the novel rotor structure, and establishes the torque analysis model of the novel rotor structure and the corresponding motor. Simulation results show that the novel rotor structure can increase the average torque. Then, this paper establishes an optimization model, in which K 1 and K 2 are taken as optimization variables, a torque fluctuation of no more than 5% is set as a constraint, and the maximum average torque is set as the optimization goal. The results show that the optimized novel rotor structure with magnetic stripe can significantly improve the torque performance of the PMSM, and the optimization method proposed is efficient.

Keywords: PMSM; novel rotor structure with magnetic stripe; air gap proportional coefficient; power density (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: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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