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퍼스널 모빌리티용 탈희토류 영구자석 동기모터 최적 설계
김기오(Ki-O Kim),임명섭(Myung-Seop Lim),박두하(Du-Ha Park),박지원(Ji-Won Park),최명균(Myeong Gyun Choi),최윤용(Yunyong Choi) 한국자기학회 2023 韓國磁氣學會誌 Vol.33 No.6
This paper presents the optimal design of a 15 kW permanent magnet synchronous motor for personal mobility using non-rare earth permanent magnets (PMs) as an alternative to neodymium PMs. The characteristics of neodymium permanent magnet motors are compared with those when replaced with ferrite permanent magnets, and methods for improvement are suggested. The electromagnetic performance according to the rotor outer diameter, the shape of the PM, and the number of layers of the PM are compared, and the initial design is carried out considering the irreversible reduction characteristics and mechanical stability. Considering that it is for personal mobility, the efficiency of the main operating points for urban driving is considered, and two-step optimization is performed to reduce the number of experimental points. Based on the optimal design results of this paper, the suitability of synchronous motors using rare earth permanent magnets for personal mobility is suggested.