Permanent Magnet Optimization for Reduction of Cogging Torque of BLDC Motor using Response Surface Methodology

반응표면법을 이용한 코깅 토크 저감을 위한 BLDC 모터의 자석 최적설계

This paper presents an optimization of permanent magnet (PM) in a brushless dc (BLDC) motor using the response surface methodology (RSM). Size and angle of the PM are optimized to minimize the cogging torque, while reducing the magnitude of harmonic at a dominant frequency and maintaining the operating torque. A fitted RS model is constructed by verifying the high reliability of the total variation and the variation of estimated error. The optimized design is validated by carrying out the reanalysis and comparing to the initial model using the nonlinear transient finite element analysis.