分析永磁电机磁场的边界轮廓法

Boundary contour method in analyzing permanent magnetic machine

利用传统边界元积分方程的被积函数的散度等于零的特性,使用了一种新型的边界元法———边界轮廓法,使求解问题的维数再降一维,不但简化了计算,而且避免了求解奇异积分.针对永磁电机的磁场问题,选择双线性函数求得相应标量磁位,并对60kVA永磁电机的磁场进行了计算.实例计算表明,该方法具有较高的精度,为计算电机电磁场开辟了一个新的计算方法.

Using the divergence free property of the traditional boundary element method, a navel boundary element method called boundary contour method (BCM) has been developed in this paper, by which one more dimension has been reduced, the computation has been simplified and the singular integral problem has been avoided. For the magnetic field problem of permanent magnetic machine, bilinear function has been chosen to seek corresponding scalar magnetic potential. And then the calculation of magnetic filed in 60kV permanent magnetic machine has been proceeded. The calculation result shows that this new method possesses high precision. The research of this article presents a new calculation method for the electromagnetic field in electrical machinery.