变频调速异步电机场路分析中的动态网格剖分

本文针对变频调速异步电机场路计算中 ,动态网格剖分的困难性 ,通过几种常用有限元剖分方法的比较 ,变形和简化了前推 Delaunay网格剖分算法 ,根据异步电机的结构特点衍生出了一种可以适用于变频调速电机设计与分析的新的动态网格剖分算法。该算法就是把要剖分的区域划分成几个带状小区域 ,根据距离最短原则生成网格。并且编程实现了有限元剖分模块。该方法与经典的ANSYS软件剖分进行了比较 :有效剖分节点数、单元数 ,以及所占用的计算机CPU时间、内存 ,都远远小于ANSYS软件的剖分结果。从而证明了该方法的有效性。

Dynamic Meshing for Circuit-field Analysis of Inverter-driven Induction Motor

The dynamic meshing for the circuit-field analysis of the inverter-driven induction motor is very difficult because of the existence of teeth, slot and airgap in the motor. In this paper, we aim at a new method of dynamic meshing applied for the design and analysis of induction motors with variable frequency and speed, according to the construction of induction motors. The underlying principle of the new meshing method includes deforming and simplifing the Delaunay advancing-front combined method, after the thorough comparison of several finite-element mesh (FEM) methods. In the new method, one pending domain is divided into some banding domains, and the lattices create following the principle of the shortest distance. A FEM module is realized by using this method. As a result of comparing with ANSYS, the module is more efficient and convenient with less nodes, elements, and use of computer's CUP source and memeries. The new method is just suitable for the dynamic mesh of the inverter-driven induction motor with high efficiency.