隐极无刷双馈电动机的研究

摘要

针对无刷双馈电动机的转子磁场转换效率决定了其工作效率的问题,提出了一种隐极无刷双馈电动机隐极转子结构的优化设计方案.对作用较小的隐极转子进行优化设计,即将它们的槽型更改为半开口槽,不断改变它们的长宽比;利用有限元软件ANSYS分析不同长宽比转子结构的隐极无刷双馈电动机,获得其功率绕组励磁与控制绕组励磁分布;利用Matlab软件分解转子磁动势,获得转子磁动势的谐波含量,从而确定最有效谐波含量.实验结果表明,在设定隐极转子的长宽比分剐为10、13、15、17、20的情况下,隐极无刷电动机在15倍长宽比转子结构时的能量转换效果最好.%In view of problem that conversion efficiency of rotator flux of brushless doubly-fed machine influences on working efficiency, the paper proposed an optimal design scheme of non-salient pole rotator structure of brushless doubly-fed machine. It made optimal design for non-salient pole rotators with less function, namely changing theirs groove to half open-slot and changing theirs length-width ratio constantly; it used finite element software ANSYS to analyze brushless doubly-fed machine with non-salient pole under different length-width ratio rotators structure to gain distribution of excitation of power winding and control winding; it used Matlab software to decompose magnetomotive force of rotator to gain harmonic content of magnetomotive force of rotator, so as to determine the most effective harmonic content. The experiment result showed that brushless doubly-fed machine with non-salient pole has the best energy conversion efficiency at rotator structure with 15 times length-width ratio when setting length-width ratio of non-salient pole is 10, 13, 15, 17 and 20 respectively.