关键词: 永磁同步电机, 等效磁网络模型, 有限元分析

Abstract: Aiming at the problem of abrupt changes in node connection relationships that occur when the equivalent magnetic network method is used to analyze motor operation, this paper proposes a magnetic network model based on variable permeance meshes. By introducing variable permeance meshes on both sides of the rotating interface in the model, the continuity of changes in node connection relationships on both sides of the interface is improved. The introduction process of variable permeance meshes at the rotating interface is described and analyzed;on this basis,the solution of the model after introducing variable permeance meshes is derived; the no-load flux linkage, back electromotive force, air-gap magnetic flux density and electromagnetic torque obtained by the magnetic network model based on variable permeance meshes are compared and analyzed with the simulation results of the finite element method and the traditional magnetic network model respectively. The results show that the proposed magnetic network model enhances the continuity of changes in node connection relationships on both sides of the rotating interface and improves the calculation accuracy.

Key words: permanent magnet synchronous machine, equivalent magnetic network model, finite element analysis