虚槽短距波绕组转子槽漏感的计算

为了计算虚槽短距转子绕组的槽漏感,依据虚槽短距波绕组结构原理,分析了一个相带绕组在发动机转子槽内的分布情况. 在此基础上应用导线间的自感及互感特性,采用微分算法研究了虚槽短距转子绕组槽内的漏磁链的分布,推导了虚槽奇数槽短距及虚槽偶数槽短距绕组的槽漏感计算方法.通过实例验证了该方法的正确性.计算结果表明:采用虚槽结构的槽漏感无论是虚槽偶数短距还是虚槽奇数短距在其节距相近时漏感值接近;采用等效实槽的转子槽漏感为虚槽漏感的2倍. 

Calculation Method for Rotor Slot Leakage Inductance of Virtual-Slot Short-Pitch Wave Winding

In order to calculate the slot leakage inductance of the virtual-slot short-pitch rotor winding in a doubly-fed induction generator (DFIG), the arrangement of a phase belt winding in the generator slot was studied from the structural principle of the virtual-slot short-pitch wave winding. Further, according to the self-induction and mutual-induction characteristics of conductors, the distribution of leakage flux linkage in the virtual slot of the short-pitch winding for rotor was derived by differential algorithm. Then, a calculation method was developed for slot leakage inductance of short-pitch windings with an odd and even number of virtual-slots, and its validity was verified through a case study. The results show that for the virtual-slot short-pitch winding, whether the number of virtual slots in the short-pitch windings is odd or even, the leakage inductance value is approximately the same. For the rotor using equivalent real slots, however, the leakage inductance is nearly twice that using virtual slots.