开关磁阻电机的三维有限元分析

Three-dimensional Finite Element Analysis of Switched Reluctance Motor

为了解决二维有限元分析开关磁阻电机磁场不准确的问题,采用了三维建模方法,对开关磁阻电机的整个场域进行三维有限元分析。基于整体建模的方法,利用三维有限元数值进行分析计算,准确描述开关磁阻电机的端部磁场效应。在三维有限元分析加载电流时,提出了"跑道线圈"这一概念。该概念在考虑了端部效应的同时,也解决了立体模型施加载荷时出现的方向选择困难的问题。采用通用磁标势法对非线性方程组进行求解,得出了最大电感和最小电感位置处的磁感应强度和磁场强度分布。

To solve the problem that two-dimensional finite element analysis of magnetic field of switched reluctance motor is not accurate enough, by using the method of three-dimensional modeling, three-dimensional finite element analysis of entire field of switched reluctance motor is accomplished. Based on the overall modeling method, and by adopting three-dimensional finite element analysis values, the end portion magnetic effect of the switched reluctance motor is described precisely. The concept of racetrack coil is put forward during three-dimensional finite element analyzing of loading current. In addition, the problem of difficulty of selecting direction of applying load for three-dimensional model is also resolved. The nonlinear equations are solved with universal magnetic scalar potential method, and the distribution of magnetic induction and magnetic field intensity at the positions of maximum and minimum induction are found.