ANALYSIS OF THE REDUCTION OF DETENT FORCE IN A PERMANENT-MAGNET LINEAR SYNCHRONOUS MOTOR

The problem in improving the positioning precision of a permanent magn et linear synchronous motor (LSM) is the large detent force caused by the permanent magnet. The detent force is thought to arise from the di fference of the position of a permanent magnet end and a tooth positio n. If one detent force is independent from the other, we call reduce t he total detent force of the permanent magnet linear synchronous motor by the arrangement of a permanent magnet end and a tooth. This paper presents are improvement of the arrangement of the permanent magnet en d of a linear synchronous motor in order to reduce the detent force by using numerical analysis.