无刷双馈电机时步有限元分析

为准确计算无刷双馈电机的暂态或稳态特性及其相应的磁场分布，提出一种场路耦合运动问题的二维时步有限元方法。其特点是：铁心饱和以及转子导条集肤效应可以直接在场的计算过程中加以考虑；采用的电路方程可以方便地处理无刷双馈电机定子绕组和转子端环的各种特殊连接方式，电压源可以是任意电压波型；三维端部效应可以通过传统的方法在电路参数中加以修正；采用耦合与约束方程来处理转子转动问题，而无须不断地对转子重新进行刨分。通过一台样机的算例和实验结果对比，表明所提出的方法是可行的。

Analysis of Brushless Doubly-fed Machine by Time Stepping Finite Element Method

Aiming at accurate evaluation of the transient and steady state behaviors as well as the related field distribution of brushless doubly-fed machine (BDFM), a 2- dimensional time-stepping finite element method was presented to solve coupled field-circuit motion problems. Core saturation and the rotor bar skin effects were directly taken into account in the field calculation. The adopted circuit equations are suitable for describing the stator windings and the special rotor-bar connections of BDFM. The waveform of supplied voltage source may be an arbitrary. Three-dimensional end effects were considered in the circuit parameter corrected by classical formulas. In addition, the coupling and constraint equations were used to handle rotor rotation without any process of remeshing. The proposed method were validated by the measured and calculated results of an application example.