A Novel Magnet-Axis-Shifted Hybrid Permanent Magnet Machine for Electric Vehicle Applications

Ya Li, Hui Yang, Heyun Lin, Shuhua Fang and Weijia Wang
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Ya Li: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Hui Yang: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Heyun Lin: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Shuhua Fang: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Weijia Wang: School of Electrical Engineering, Southeast University, Nanjing 210096, China

Energies, 2019, vol. 12, issue 4, 1-13

Abstract: This paper proposes a novel magnet-axis-shifted hybrid permanent magnet (MAS-HPM) machine, which features an asymmetrical magnet arrangement, i.e., low-cost ferrite and high-performance NdFeB magnets, are placed in the two sides of a “?”-shaped rotor pole. The proposed magnet-axis-shift (MAS) effect can effectively reduce the difference between the optimum current angles for maximizing permanent magnet (PM) and reluctance torques, and hence the torque capability of the machine can be further improved. The topology and operating principle of the proposed MAS-HPM machine are introduced and are compared with the BMW i3 interior permanent magnet (IPM) machine as a benchmark. The electromagnetic characteristics of the two machines are investigated and compared by finite element analysis (FEA), which confirms the effectiveness of the proposed MAS design concept for torque improvement.

Keywords: hybrid permanent magnet; interior permanent magnet (IPM) machine; magnet-axis-shifted; reluctance torque (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (8)

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