笼型感应电动机的节点电路和二维有限元法的耦合分析

Nodal Based Circuit to 2D FEM Coupled Analysis of Squirrel-Cage Induction Motors

介绍了一种预测三相笼型感应电动机性能的新方法。这种方法是基于把非线性正弦电磁场的二维有限元分析与电路理论中的节点分析两种方法严格地耦合在一起。由于定子三相绕组与转子笼条之间的连接关系采用电路模型来表示,而电机的非线性及集肤效应采用有限元来模拟,故本方法仅需要已知三相输入电压及转差率,就可得到完整的电动机性能数据。

This paper presents a novel approach for performance prediction of three-phase squirrel-cage induction motors.The approach is based on a rigorous coupling of two-dimensional finite element analysis of nonlinear time-harmonic magnetic field,and the nodal analysis method in electric circuit theory.With the connections of the three-phase stator winding and the rotor cage are represented by an electric circuit model,and the nonlinearity and skin effects in the motor are modeled by finite elements,the present approach requires only input of three-phase voltages and slip,which yields complete motor performance data such as stator currents,rotor cage bar currents,phase angles and torque.