平面变压器中并联绕组的均流设计  

CONSIDERATION FOR CURRENT SHARING AMONG PARALLEL WINDINGS IN PLANAR TRANSFORMERS

作　　者：旷建军[1] 阮新波[1] 任小永[1] 

机构地区：[1]南京航空航天大学航空电源重点实验室,江苏省南京市210016

出　　处：《中国电机工程学报》2005年第14期146-150,共5页Proceedings of the CSEE

基　　金：霍英东教育基金会高等院校青年教师基金(91058)

摘　　要：在低压大电流DC/DC模块电源中,为了增加绕组的载流能力,经常使用并联绕组。由于电磁场的高频效应(集肤效应和邻近效应),可能导致电流在各并联绕组层中不均分,产生较高的交流电阻。该文基于绕组布置的结构对称性和并联绕组两端电压相等的原理,推导得到在所有偶数层中,使电流在各并联绕组中分布一致的绕组布置方法。并通过有限元分析软件和实验证实了此绕组布置方法的正确性和有效性。In order to enhance the current handling capacity of the windings, it is a very common practice to use parallel windings in low voltage and high current DC/DC converters. Because of high-frequency effects （namely skin effect and proximity effect）, the current flowing through thos ewindings may be not equally divided among them, resulting in high ac resistance. Based on symmetrical structure of winding arrangement and voltage balance in parallel windings, a way for winding arrangement is derived, which makes current share in the windings with even number of layers. Finite Element Analysis （FEA） and test prove its correction and effectiveness.

关 键 词：平面变压器 并联绕组 交流电阻 绕组布置 

分 类 号：TM433[电气工程—电器]