A New Spoke PM Motor with ECC ASPs to Reduce Flux Density Harmonics

Gaohong Xu, Tang Tang, Qian Chen () and Zexin Jia
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Gaohong Xu: Department of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Tang Tang: Department of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Qian Chen: Department of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
Zexin Jia: Department of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China

Energies, 2022, vol. 15, issue 17, 1-15

Abstract: This paper proposes new eccentric (ECC) auxiliary salient poles (ASPs) applied in spoke permanent-magnet (PM) motors. These ECC ASPs optimize flux density harmonics and further reduce torque pulsation. Then, the optimization procedure is proposed to reveal the relationship between the ECC method and ASP, and optimization steps are reduced. Firstly, the design of the ECC ASPs is based on the stairs, which are equivalent to sinusoidal flux density. Second, the expressions of offset length for maximum air gap, pole arc angle, and thickness ratio are revealed. Through theoretical analysis and the finite element method (FEM), the proposed ECC ASPs can generate low torque pulsation and improve sound and vibration features.

Keywords: eccentric (ECC); auxiliary salient poles (ASPs); torque pulsation; sound and vibration (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: 2022
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