정수 슬롯 분포권 영구자석 동기모터의 치변조 기반 진동 특성 분석

초록

This study investigates the vibration characteristics of integer-slot distributed winding permanent magnet synchronous motors (PMSMs) by considering the tooth modulation effect of slot harmonics. While conventional analyses mainly emphasize the influence of the lowest-order force components, the proposed approach demonstrates that slot-order force harmonics can be modulated into zeroth-order forces through the tooth modulation effect. To validate this mechanism, electromagnetic and modal analyses were conducted on a 12-pole 72-slot concentrated flux PMSM. The results indicate that under rated operating conditions, vibration is dominated by the 2f_e component; however, at higher speeds, the (s/p)f_e component coincides with the zeroth-mode natural frequency, causing the zeroth-order force to dominate the vibration response. These findings reveal a previously overlooked source of vibration in distributed winding PMSMs and highlight the necessity of considering both the lowest-order and zeroth-order forces for low-noise and low-vibration motor design.

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