低压大电流双凸极无刷直流发电机电枢绕组股线环流的抑制方法

摘要

为了有效抑制低压大电流双凸极电机电枢绕组中的股线环流,提出电枢绕组结构优化方法.首先建立能够充分考虑绕组股线位置、线包间股线串联顺序的精细化二维有限元仿真模型,对低压大电流双凸极电机中电枢绕组股线环流产生的机理进行研究.在此基础上,提出三种优化过的电枢绕组结构,并分别建立仿真模型将它们与未优化过的结构在股线环流分布、铜损、效率等方面进行对比分析.最后,制作两台不同绕组结构的股线环流验证原理样机进行对比实验研究.仿真和实验结果表明,股线均匀穿过槽深与槽宽的电枢绕组结构具有最好的股线环流抑制效果.%In this paper, optimized armature winding configurations are proposed to suppress the strand circulating currents in armature windings of low-voltage high-current doubly salient brushless dc generator. Refined two-dimension finite element analysis model is built considering strand position and strand serial sequence between different coils, to study the generation mechanism of strand circulating current in multi-strand armature windings. Three optimized armature winding configurations are proposed, and the simulation models are respectively established to compare them with the unoptimized one in terms of strand current distribution, copper loss and efficiency by finite element analysis method. Two prototypes with different armature winding configurations are made for comparative experiments. The simulation and experimental results indicate that the third optimized armature winding configuration, whose strands pass through all slot breadth and slot depth, is the best one for suppressing circulating current.