高电压技术2025，Vol.51Issue(1)：75-87,13.DOI:10.13336/j.1003-6520.hve.20241196
圆形利兹线高频变压器双二维漏感解析计算模型
Double Two-dimensional Leakage Inductance Analytical Calculation Model of Round Litz-wire High Frequency Transformer
摘要
Abstract
The leakage inductance of round litz-wire high-frequency transformer(HFT)affects the performance and op-eration life of power electronic devices,therefore precise calculation and control of leakage inductance are required.However,the body structure of HFT is three-dimensional,and the accuracy of traditional calculation models based on one-dimensional assumptions cannot be ensured.Therefore,based on the principle of image method,this paper simplifies the leakage magnetic field distribution of HFT using double two-dimensional equivalent method.Considering the influ-ence of high-frequency eddy current effects on the leakage magnetic energy inside the round litz-wire,we establish the double two-dimensional leakage inductance analytical calculation model for HFT.The leakage inductance variation char-acteristics of HFT under the conditions of opening air gap of magnetic core and winding interleaving are analyzed using the proposed model.The double two-dimensional leakage inductance analytical calculation model is applied to the opti-mization design process of HFT,and two HFT prototypes with transformation ratios of 200 V/200 V and 300 V/600 V are designed and manufactured.The leakage inductance of the prototype is measured through experiments,and the global av-erage deviation between model calculation values and experimental measurement values is less than 2%,which verifies the accuracy of the proposed model.Finally,by comparing and analyzing the applicability of the model in this paper,it is concluded that the computational accuracy and time cost of the model will increase with the increase of the image layers and grid divisions.This study provides a reference for the application of the proposed model in round litz-wire HFT opti-mization design.关键词
圆形利兹线高频变压器/漏电感/镜像法/高频涡流效应/气隙Key words
round litz-wire high-frequency transformer/leakage inductance/image method/high frequency eddy current effect/air gap引用本文复制引用
张鹏宁,李朋阳,刘泽,张荐,曹清山,李磊..圆形利兹线高频变压器双二维漏感解析计算模型[J].高电压技术,2025,51(1):75-87,13.基金项目
国家自然科学基金(52007192) （52007192）
中央高校基本科研业务费专项基金(2023ZKPYJD09). Project supported by National Natural Science Foundation of China(52007192),Fundamental Research Funds for the Central Universities(2023ZKPYJD09). （2023ZKPYJD09）
