采用新型双绞铜箔的变压器线圈交流损耗建模与分析  

Modeling and analysis for AC losses of the winding with a litz copper foils

作　　者：毛行奎[1] 陈为[1] 

机构地区：[1]福州大学电气工程与自动化学院,福建福州350002

出　　处：《福州大学学报（自然科学版）》2005年第1期50-53,共4页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省自然科学基金资助项目(A0210011);福州大学科技发展基金资助项目(2004-XY-02)

摘　　要：提出一种应用于低压大电流高频开关电源功率变压器的新型双绞并联铜箔线圈.由于铜箔双绞并联,铜箔间的电流及电流密度均匀,从而减小了并联线圈的交流损耗.与线圈的交错结构比较,双绞铜箔并联结构线圈的变压器具有最小的原副边耦合电容.通过建立一维涡流模型,对新型双绞铜箔进行交流损耗分析,分析结果表明铜箔绞绕方案能有效减小线圈损耗.A new concept of litz copper foils is proposed to reduce AC winding losses of high frequency power transformer in high current low voltage switch-mode power supply. The AC winding losses are reduced due to more even current density distribution in copper layers under litz structure. Instead of using sandwiched or interleaved structures, the windings by the litz copper foils keep the inter-winding capacitance the minimum. 1-D eddy current model for litz copper foils is built to analyze AC winding losses. The analysis shows that litz structure having great effects in AC winding losses reduction.

关 键 词：高频开关电源 功率变压器 双绞铜箔线圈 线圈损耗 

分 类 号：TM43[电气工程—电器]