Magnetic field Analysis and Parameters Calculation for Two-Degree-of-Freedom Direct Drive Induction motor

摘要

This paper employs analytical method to analyze electromagnetic field and calculate parameters of two-degree-of-freedom direct drive induction motor (2DOFDDIM) with solid rotor coated with copper layer taking the radial nonlinear magnetic permeability of solid steel into consideration. The 2D electromagnetic field multi-layer model was established. The specific method dealing with parameters determination needed by multi-layer iterative utility program was proposed to calculate the equivalent circuit parameters of solid steel. The propagation constant was introduced to calculate parameters of copper layer. A complete 2DOFDDIM stratification method diagram was provided and the accuracy of analytical method is verified with comparison to finite element method.