用等效磁网络法与有限元法计算永磁电机参数的比较

应用等效磁网络法与有限元法对永磁同步电动机的参数进行了分析计算，并加以比较．等效磁网络法是一种介于等效磁路法和有限元法之间的分析方法，原理简单，实现方便，计算精度高于等效磁路法，计算时间少于有限元法．磁网络中各单元的划分可以形成规范化，前后处理工作量小，便于对不同磁路结构的永磁同步电动机进行计算．二维有限元法计算精度高，但计算过程复杂繁琐．两种方法各有其特点，在实际计算中，应根据不同情况应用不同的方法．

Application and Comparison of Finite Element Method and Equivalent Magnetic Network Method in Computing Electromagnetic Parameters of Permanent Magnet Motor

In this paper the electromagnetic parameters of the permanent magnet motor are computed respectively by finite element method(FEM) and equivalent magnetic network method(EMNM), and the two methods are compared. EMNM is a compromise between field and circuit methods. It has the advantages of simplicity, less computing time and lower coding effort compared with FEM. FEM is a mature, reliable numerical method used in computing the field of electric machines. The comparison shows that each method has its own characteristics and should be applied in different situations.