Static Thrust Characteristics of Permanent Magnet Type Linear Synchronous Motor.

Abstract

This paper deals with the analyzing results of static thrust of a permanent magnet type linear synchronous motor (LSM) from both sides of theory and experiment. It is necessary to make clear how the width and taper length of the permanent magnet affect static thrust characteristics of a LSM, because it was not so definite.In this paper, the following points are discussed:(1) The theoretical expressions of the static thrust of the LSM were derived from the permeance analysis method and finite element method(FEM).(2) The width and taper length of the permanent magent which give influence on harmonic components of static thrust were investigated through the FEM. The error of calculated value through the FEM is found within 10% of measured value of speed electromotive force and static thrust.(3) The error through the permeance analysis method is found within 20% of measured value. The calcurated value in the permeance analysis method corresponded likely to the mean static thrust of measured value.