有限元法计算异步电机不同转速的等值电路参数

Calculation of Equivalent Circuit Parameters of an Induction Motor Using Finite Element Method

提出一种能够精确计算异步电机等值电路参数及其稳态性能的方法,该方法基于场路耦合的伪静止复数涡流有限元模型,铁芯饱和以及集肤效应直接在场中计及,不须考虑转子的转动,利用不同滑差时的磁场分析结果就能计算相应的等值电路参数,诸如端环,斜槽等三维效应可以通过传统的方法加以考虑。实验结果证明了该方法的有效性。

The paper proposed a new method for accurately calculating the equivalent circuit parameters of an induction motor. The method is based on the pseudo-still 2D turbine finite element model coupled with field and circuit ; the model can accurately predict the equivalent circuit parameters of the motor at different skew points and its steady-state performance without the need to consider the rotation of its rotor. Iron core saturation and rotor bar skin effect are considered directly in the field. The equivalent circuit parameters at different skew points are calculated using magnetic field analysis results, and 3D effects such as end-winding and rotor skew are considered using traditional methods. A computation instance provided at the end of the paper proves the effectiveness of the method.