Design and Analysis of an SPM Machine for EPS Applications to Reduce Torque Ripple; [토크 리플 저감을 위한 용 전동기 설계 및 해석]

초록

Minimizing the torque ripple of the electric machines used in electric power steering (EPS) systems is essential to improve the drivability of vehicles. This study introduces mathematical expressions to reduce torque ripple. It also describes an efficient design process to meet multiple design objectives and constraints. A surrogate model-based optimization algorithm with adaptive sampling is applied to perform the optimal design of a fractional-slot surface-mounted permanent magnet synchronous machine (SPMSM). The results show that the optimized design achieves significant improvements in torque density, efficiency, and cost-effectiveness while meeting both torque ripple and cogging torque constraints. Copyright The Korean Institute of Electrical Engineers.

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