Investigation of Linear Generator for High Speed Maglev Train by 2D Finite Element Model

Abstract

This paper analyzes the electromotive force (EMF) of linear generator (LG) for high speed maglev train in detail, which considers the influence of long-stator linear synchronous motor (LSM). The basic operating principle of LG is analyzed firstly, and then the influence of structure parameters and operating conditions on the EMF effective value of fundamental wave is analyzed and compared by 2D finite element model, including mover pole pitch, air gap length, armature current, excitation current, linear generator current and train speed. The results show the effective value and initial phase of EMF in ten LGs change successively when the stator pitch and mover pitch are unequal, the total harmonic distortion decreases along with the increase of air gap length, the excitation current has more significant effect on EMF than armature current, and the LG current has less influence on EMF. In addition, the EMF of LG increases linearly with the operating velocity, which is also influenced by the LG position.