锥形转子永磁电机的磁场分析及电感参数计算

Magnetic Field Analysis and Inductances Calculation of Taper Permanent Magnet Motor

分析了锥形转子永磁电机的磁场分布,比较了分段计算方法和三维有限元方法在处理该种沿轴向磁场分布不均匀问题时的有效性,分析结果通过空载反电势实验得到了验证。之后采用三维有限元方法求取了转子在不同轴向位置时电机的交直轴电感,得到了该种电机交直轴电感参数的变化规律;通过实验测试了在不同频率及转子在不同轴向位置时电机的交直轴电感。实测交直轴电感与三维有限元分析结果吻合较好,验证了分析的正确性。

The taper permanent magnet motor was analyzed and the effectiveness of two methods on handling of problems concerned with non-uniform distribution of magnetic field along axial direction in electric motor was studied, which were sectional calculation method and 3D finite element method. The analyzed results were verified by no-load EMF experiment of the electric motor. Then the variation of direct axis and quadrature axis inductances was obtained by 3D finite element method for the taper permanent magnet motor with the taper rotor at different axial locations. And the inductances of a prototype were measured at different test frequency and with taper rotor at different axial locations. The experimental results which agreed well with calculated results by 3D finite element method verified the validity of the analyses.