电气传动2025，Vol.55Issue(3)：27-34,8.DOI:10.19457/j.1001-2095.dqcd24993
纳米晶高频变压器漏磁通磁芯涡流损耗分析
Analysis of Core Eddy Current Loss Caused by Leakage Flux in Nanocrystalline High-frequency Transformer
摘要
Abstract
High-frequency transformers are an essential component in series-resonant DC/DC converters,and their stable operation has a decisive impact on the reliability,efficiency,and power density of power supply systems.Nanocrystalline magnetic cores are widely used due to their advantages of high saturation magnetic flux,high magnetic permeability,low coercivity,and low high-frequency losses.In order to improve the power density of DC/DC converters,the leakage inductance of high-frequency transformers is commonly used as a resonant inductor to achieve the soft-switching characteristics of the switching devices.However,nanocrystalline alloys possess a high electrical conductivity,and when high-frequency leakage magnetic flux passes perpendicularly through the surface strip,it induces strong eddy currents,which could result in potential thermal issues,thereby compromising the stable and safe operation of the transformer and the system.An improved finite element simulation method for high-frequency transformers was proposed for determining the distribution characteristics of additional eddy current losses induced by high frequency leakage flux at large leakage inductance by building a three-dimensional model of nanocrystalline strips at the edge of the independent core,and its validity was verified by temperature rise experiments.关键词
纳米晶磁芯/高频变压器/漏感/涡流损耗Key words
nanocrystalline core/high-frequency transformer/leakage inductance/eddy current loss分类
动力与电气工程引用本文复制引用
刘学,赵鲁,马呈瑶,范恩泽,葛琼璇..纳米晶高频变压器漏磁通磁芯涡流损耗分析[J].电气传动,2025,55(3):27-34,8.基金项目
中国科学院青年创新促进会项目(2020146) （2020146）
北京市自然科学基金-丰台轨道交通前沿研究联合基金(L201005) （L201005）
