Tolerance-Insensitive Design of the Magnet Shape for a Surface Permanent Magnet Synchronous Motor

Chung-Seong Lee, Kyoung-Soo Cha, Jin-Cheol Park and Myung-Seop Lim
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Chung-Seong Lee: Central R&D Center, Mando Corporation, Seongnam 13486, Korea
Kyoung-Soo Cha: Department of Automotive Engineering, Graduate School of Engineering, Hanyang University, Seoul 04763, Korea
Jin-Cheol Park: Department of Automotive Engineering, Graduate School of Engineering, Hanyang University, Seoul 04763, Korea
Myung-Seop Lim: Department of Automotive Engineering, Graduate School of Engineering, Hanyang University, Seoul 04763, Korea

Energies, 2020, vol. 13, issue 6, 1-16

Abstract: Many studies have been conducted to reduce the cogging torque of electric power steering motors. However, in the mass production of such motors, it is essential to enhance performance robustness in relation to tolerances. For such motors, this work analyzes performance robustness in relation to tolerances by applying a cycloid curve to the surface magnet of the rotor. Applying a cycloid curve to the magnet surface of the rotor is one of several ways to reduce cogging torque. To evaluate the performance of the cycloid curve, we compare it with an eccentric curve. The two curves are compared for the same specifications and evaluated using the indicator, tolerance insensitivity rate, which is used to assess performance robustness in relation to tolerances. The cycloid curve was evaluated to be more robust in relation to tolerances, as compared with the eccentric curve. Finally, an experiment was conducted to validate the robustness of the cycloid curve.

Keywords: tolerance insensitivity rate (TIR); surface permanent magnet (SPM) motor; cogging torque; cycloid curve; eccentricity curve; electric power steering (EPS) (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 references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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