Optimization of Electromagnetic Performance of Single Phase Line-Start Permanent Magnet Synchronous Motor Based on the Finite Element Method

The single-phase motors are widely used in the field of household appliances. Compared with three-phase motors, they are small in size and directly connected to 220V single-phase civilian power supplies. The single phase line- start permanent magnet synchronous motor (SPLSPMSM) inherits the advantages of single-phase induction motor and effectively overcomes its disadvantage of low efficiency [1]. Due to the asymmetry of the stator phases, a lot of research is still needed to improve working performance. In this paper, the mathematical model in steady-state operation of SPLSPMSM is built, and the inductance parameters are analytically calculated. Based on the finite element method (FEM), the influences of parameters such as phase turns, capacitance of auxiliary phase and permanent magnet thickness are analyzed for both interior and surface-mounted SPLSPMSM.