Calculation of ohmic losses in litz wires by coupling analytical and numerical methods

Andreas Robkopf, Christopher Joffe, E. Bar
{"title":"Calculation of ohmic losses in litz wires by coupling analytical and numerical methods","authors":"Andreas Robkopf, Christopher Joffe, E. Bar","doi":"10.1109/EDPC.2014.6984423","DOIUrl":null,"url":null,"abstract":"Up to now, litz wires with many (several hundreds) strands are simplified in complex systems such as transformers or coils to make simulations feasible. However, frequency dependent losses of litz wires and solid conductors differ strongly. In this paper, a coupled process of numerical simulation and analytical methods is described which allows efficient simulation of full 3D structures including resolving litz wire sub-structure. To achieve this, 3D simulation with a simplified conductor calculates the magnetic field in the entire system. Based on these data, a new analytical method determines the losses in the litz wire along the conductor for the large number of 2D cross-sections. The error of the analytical method is less than 5% at frequencies up to 1MHz and external magnetic fields up to 2500kA/m. Because of the significant reduction of calculation time, windings and ferrite structures can be efficienly optimized.","PeriodicalId":423456,"journal":{"name":"2014 4th International Electric Drives Production Conference (EDPC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2014-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2014 4th International Electric Drives Production Conference (EDPC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/EDPC.2014.6984423","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 10

Abstract

Up to now, litz wires with many (several hundreds) strands are simplified in complex systems such as transformers or coils to make simulations feasible. However, frequency dependent losses of litz wires and solid conductors differ strongly. In this paper, a coupled process of numerical simulation and analytical methods is described which allows efficient simulation of full 3D structures including resolving litz wire sub-structure. To achieve this, 3D simulation with a simplified conductor calculates the magnetic field in the entire system. Based on these data, a new analytical method determines the losses in the litz wire along the conductor for the large number of 2D cross-sections. The error of the analytical method is less than 5% at frequencies up to 1MHz and external magnetic fields up to 2500kA/m. Because of the significant reduction of calculation time, windings and ferrite structures can be efficienly optimized.
用耦合解析和数值方法计算利兹导线的欧姆损耗
到目前为止,在变压器或线圈等复杂系统中,具有许多(数百)股的利兹线被简化以使模拟可行。然而,利兹线和固体导体的频率相关损耗差异很大。本文描述了一种数值模拟和解析方法的耦合过程,该过程可以有效地模拟全三维结构,包括解析利兹丝子结构。为了实现这一目标,采用简化导体的3D模拟计算了整个系统的磁场。基于这些数据,一种新的分析方法确定了大量二维截面沿导体的litz线损耗。在频率为1MHz,外加磁场为2500kA/m时,分析方法的误差小于5%。由于大大减少了计算时间,绕组和铁氧体结构可以有效地优化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信