A Study on Comparison of Normal Force and Design Parameters in IPMSM(Interior Permanent Magnet Synchronous Motor) with Concentrated Winding according to Pole-Slot Combinations

극 수와 슬롯 수 조합에 따른 집중권 방식 매입형 영구자석 동기전동기의 Normal Forces 및 설계 파라미터의 비교에 관한 연구

Interior Permanent Magnet Synchronous Motor(IPMSM) have many advantages such as high power density, wide speed range and so on. With the IPMSM, miniaturization and energy efficient design can be achieved in comparison with Surface Permanent Magnet Synchronous Motor(SPMSM). In order to secure miniaturization and manufacturing efficiency of the motor, it has concentrated winding, because concentrated winding can reduce the motor volume and make manufacturing to be simple compared with the distributed winding. However, according to the pole-slot combinations motor parameters can be changed and unexpected normal force can be generated. Especially, unbalanced normal force in airgap can cause serious vibration and acoustic problem. Accordingly, in this paper, normal force and parameters variation of concentrated winding IPMSM are investigated according to the pole-slot combinations.