Electromagnetic Performance Analysis of PM Linear Synchronous Motor with Star-Delta Windings

In order to achieve high thrust density and dynamic performance, this study investigates design criteria and electromagnetic characteristics of a permanent magnet (PM) synchronous linear motor with star-delta winding. Firstly, analytical model of armature magnetic potential harmonics and winding inductance is established. Next, electromagnetic characteristics are calculated by finite element method. Simultaneously, inductance waveform characteristics considering end effects with different pole-slot combinations are analyzed respectively, and then design criteria for hybrid windings are summarized. Finally, experiment of 14-pole, 12-slot linear motor is carried out to validate analysis results.