关键词: 永磁直线同步电机, 取向硅钢片, 等效磁网络, 灵敏度分析, 多目标优化

Abstract: To improve the thrust density and overload capacity of permanent magnet linear synchronous motor, oriented silicon steel sheets were applied to the primary core of linear motor. An equivalent magnetic network model of oriented silicon steel linear motor was constructed. Combined with the model, a hierarchical optimization method based on sensitivity analysis was studied, taking thrust, thrust fluctuation and permanent magnet utilization rate as optimization objectives. Taguchi method combined with genetic algorithm was used for multi-objective optimization of significant optimization variables, and single parameter scanning method was used for single objective optimization of common optimization variables. The results show that, compared with the original scheme, the optimization schemes of the oriented silicon steel linear motor have greater thrust and less thrust fluctuation, and the utilization rate of permanent magnet has been improved.

Key words: permanent magnet linear synchronous motor, oriented silicon steel sheet, equivalent magnetic network, sensitivity analysis, multi-objective optimization