电工技术学报2019，Vol.34Issue(2)：245-254,10.DOI:10.19595/j.cnki.1000-6753.tces.180159
基于辅助绕组的中频变压器绕组交流电阻测量方法
Investigation on Measurement Method of Transformer Winding AC Resistance by Using Auxiliary Winding
摘要
Abstract
The measurement of winding AC resistance is important for the copper loss evaluation of medium-frequency transformer (MFT) in the power electronic system.The common method is short-circuit test using impedance analyzer or LCR meter, which can only obtain the total AC resistance of primary and secondary winding.The measurement method to separate the AC resistance of the two winding is presented in this paper.An impedance coupling analytical model of MFT with auxiliary winding is developed, and the effect of coupling coefficient of primary winding between auxiliary winding and secondary winding on measurement results of AC resistance is analyzed.Finally, an online symmetrical coupling auxiliary winding measurement method is developed based on foregoing analytically determined information to significantly increase measurement accuracy.The developed method is applied in a 2kW MFT, where the accuracy of online measured results is validated by Dowell model, finite-element analysis predicted results and standard short-circuit test.关键词
交流电阻/中频变压器/辅助绕组/测量Key words
AC resistance/medium frequency transformer/auxiliary winding/measurement分类
信息技术与安全科学引用本文复制引用
王瑞田,肖飞,赵治华,杨国润,张新生..基于辅助绕组的中频变压器绕组交流电阻测量方法[J].电工技术学报,2019,34(2):245-254,10.基金项目
国家自然科学基金资助项目(51477180,51707200) （51477180,51707200）
