Analysis of the Reduction of Detent Force in a Permanent Magnet Linear Synchronous Motor

영구자석형 선형 동기전동기의 디텐트력 저감방식에 관한 특성해석 및 상호 비교

The problem in improving the positioning precision of a permanent magnet linear synchronous motor(PMLSM) is the large detent force caused by the permanent magnet. The detent force is thought to arise from the difference of the position of a permanent magnet end and a tooth position. In this paper, Three methods of reducing detent force is presented The first method is adjusting the width of permanent magnet. The second method is varying the shape of armature teeth. The third method is the arrangement of the permanent magnet end. This paper compares with the ratio of reducing the detent force according to the three methods.