Design of permanent magnet linear synchronous motor with low force pulsations

Issue title: Selected Papers from the 14th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2009), Part I

Article type: Research Article

Authors: Zhu, Yu-Wu^a

Affiliations: [a] Department of Electrical Engineer Dong-A University, 840 Hadan 2-Dong, Saha-Gu, Pusan 604714, Korea

Abstract: This paper proposes a novel technique to reduce the detent force in permanent magnet linear synchronous motor (PMLSM) using auxiliary poles. The detent force that is caused by the attraction between the permanent magnet (PM) and the iron core without input current can be divided into two components: the slot effect and the end effect. To reduce these two effects, we analyze the characteristics of the detent force according to semi-closed slot clearance length and auxiliary poles position by using the two-dimensional (2-D) finite element method (FEM). The numerical calculations and the experimental results prove that this proposed technique has a good effect on the reduction of the detent force.

Keywords: Permanent magnet linear synchronous motor, detent force, auxiliary poles, end effect

DOI: 10.3233/JAE-2010-1164

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 1-2, pp. 605-611, 2010