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Optimal rotor shape design of 3-step skew spoke type BLAC motor to reducing cogging torque

Issue title: Selected Papers from ISEF 2015

Guest editors: Paolo Di Barba and Sƚawomir Wiak

Article type: Research Article

Authors: Kim, Sung-Ana | Choi, Gui-Dongb | Lee, Jub | Cho, Yun-Hyuna; *

Affiliations: [a] Department of Electrical Engineering, Dong-A University, Busan, Korea | [b] Department of Electrical Engineering, Hanyang University, Seoul, Korea

Correspondence: [*] Corresponding author. Yun-Hyun Cho, Department of Electrical Engineering, Dong-A University, Busan, Korea. Tel.: +82 51 200 7742; Fax: +82 51 200 7743; E-mail:yhcho@dau.ac.kr

Keywords: EPS, 3-step skewing, spoke type BLAC, cogging torque, FEA, optimization

DOI: 10.3233/JAE-2005

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 51, no. s1, pp. S135-S145, 2016

Published: 7 April 2016
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Abstract

In electric power steering (EPS), spoke type brushless ac (BLAC) motors offer distinct advantages over other electric motor types in terms of torque smoothness, reliability and efficiency. This paper deals with the shape optimization of spoke type BLAC motor, in order to minimization cogging torque. In this paper examines, 3 step skewing rotor angle, optimizing rotor core edge and rotor overlap length for minimize cogging torque in spoke type BLAC motor. The methods were applied to existing machine designs and their performance was calculated using finite- element analysis (FEA). Prototypes of the machine designs were constructed and experimental results obtained. It is shown that the FEA predicted the cogging torque to be nearly reduce using those method.

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