中心抽头变压器中并联绕组的均流设计  

Consideration of Current Sharing Among Parallel Windings of Central-tapped Transformer

作　　者：旷建军[1] 阮新波[1] 任小永[1] 

机构地区：[1]南京航空航天大学自动化学院,江苏省南京市210016

出　　处：《中国电机工程学报》2009年第9期112-117,共6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：针对带中心抽头变压器在低压大电流场合应用时,并联绕组的布置方法对均流效果以及损耗的影响进行了研究。由于中心抽头变压器副边两个绕组是分时工作的,其并联绕组设计不同于单副边绕组变压器,不仅在并联绕组中存在电流不均分问题,而且邻近效应会在不工作绕组内产生涡流损耗。基于一维绕组模型和单副边绕组变压器并联绕组的均流方法,推导得到中心抽头变压器并联绕组的布置方法。该方法中参与工作的绕组的相对位置和单副边绕组一致,从而可使电流在并联绕组中均分,同时可减小不工作绕组由于邻近效应产生的涡流损耗。通过有限元分析和实验验证了该方法的正确性和有效性。Effects of winding arrangement of central tapped transformer on current sharing of paralleled windings and losses for applications to low voltage and high current context was investigated. Currents are not shared in parallel windings and the working winding will cause eddy losses in other winding that is not on its duty, because the two secondary windings work in time-sharing mode. Based on onedimensional model of transformer windings and the way of winding arrangement, which makes current shared in parallel windings of the single secondary winding of transformer, a novel way for winding arrangement was derived for central tapped transformer. In this winding arrangement, relative position of working windings is consistent with the single secondary winding of transformer, which ensures current sharing within parallel windings for central tapped transformer and the eddy losses caused by proximity effect in other winding that is not on its duty is decreased. Finite element analysis and experiment validated the proposed method.

关 键 词：平面变压器 并联绕组 中心抽头变压器 绕组布置 绕组损耗 

分 类 号：TM403[电气工程—电器]