应用于LLC变换器中平面型非整数匝变压器

应用于LLC变换器中平面型非整数匝变压器摘要LLC变换器是电力电子变压器、不间断电源系统的重要组成部分，在电动汽车、分布式发电、能量存储等方面被广泛应用，有着极其重要的研究价值。而如何实现变换器的高效率、高功率密度、能量的双向流动是相关研究设计的重点与难点，对其相关领域的发展具有重大意义。基于此，本文便是对LLC变换器和平面非整数匝变压器进行研究设计，并将平面变压器应用到LLC谐振变换器中。任务的研究内容分为如下三个内容。第一，本文对课题的研究背景进行阐述，对LLC变换器及平面变压器的发展现状进行分析，同时阐述了LLC谐振变换器的拓扑结构和工作模态，在此基础上，对谐振变换器建模，并对其谐振频率、增益特性进行分析。第二，本文详细探究了非整数匝变压器的设计和实现，对非整数匝变压器的寄生参数计算、磁芯和绕组参数优化等问题进行研究。并且，作者改进了非整数匝变压器的绕组排布结构，且综合考虑绕组损耗，磁芯损耗和磁芯占地面积大小，给出了非整数匝变压器的设计方法。第三，借助Ansys Maxwell仿真软件建模、仿真分析，验证了平面变压器设计的合理性与正确性。关键词：LLC变换器，非整数匝变压器，效率优化Planar non-integer turns transformer in LLCconverterAbstractLLC converter is an important part of power electronic transformer and uninterruptible powersupply system.It is widely used in electric vehicle,distributed generation,energy storage and so on,and has extremely important research value.However,how to realize the high efficiency,highpower density and bidirectional energy flow of the converter is the focus and difficulty of relevantresearch and design,which is of great significance to the development of its related fields.Based onthis,the LLC converter and planar non-integer turns transformer are studied and designed in thispaper,and the planar transformer is applied to LLC resonant converter.First of all,this paper describes the research background of the topic,analyzes thedevelopment status of LLC converter and planar transformer,and describes the topology structureand working mode of LLC resonant converter.On this basis,the resonant converter is modeled andits resonant frequency and gain characteristics are analyzed.Secondly,this paper explores thedesign and implementation of non-integer turns transformer in detail,and studies the calculation ofparasitic parameters,optimization of magnetic core and winding parameters of non-integer turnstransformer.In addition,the author improves the winding arrangement structure of the non-integerturns transformer,and gives the design method of the non-integer turns transformer considering thewinding loss,magnetic core loss and magnetic core area.Finally,using Ansys Maxwell simulationsoftware modeling,simulation analysis,verified the rationality and correctness of the planartransformer design.Key words:LLC converter,non-integer turs transformer,efficiency optimization目录须要Abstract..............II第一章引言.…1.1研究的背景和意义....1.2国内外研究现状.......…1.3本文主要研究内容及章节安排第二章LLC变换器的设计和性能分析...2.1LLC变换器的拓扑结构.....2.2LLC变换器工作模态......。.52.3集成非整数匝变压器的LLC变换器拓扑8第三章非整数匝变压器的工作原理与优化设计.113.1非整数匝变压器的工作原理..113.2非整数匝变压器中电感优化....123.2.1励磁电感的确定.....123.2.2谐振电感的确定..·...143.3非整数匝变压器的设计.....143.3.1非整数匝变压器的结构设计143.3.2非整数匝变压器的参数设计15第四章仿真与分析......194.1 ANSYS仿真原理..194.1.1磁场仿真..194.1.2静电场仿真...194.2电磁联合仿真...20第五章总结与展望..·245.1总结....245.2展望...24参考文献....25致谢.……27第一章引言1.1研究的背景和意义随着现代电子技术的飞速发展，电源电子系统已成为各种电子设备中不可或缺的部分。而LLC变换器作为一种高效能的转换器，在现代电源电子系统中越来越受到重视和应用。LLC变换器由输入电压、输出电压和开关电源三部分组成，其中变压器作为LLC变换器的核心部件，对其性能起着至关重要的作用。传统的整数匝变压器在LLC变换器中应用存在以下几个局限性：(1)频率响应范围窄：传统的整数匝变压器的频率响应范围受到匝数的限制，频率响应范围窄，不能满足高频率下的工作需求。(2)电感漏耗大：传统的整数匝变压器在高频工作下容易产生电感漏耗，导致能量损失增大，降低LLC变换器的效率。(3)尺寸笨重：传统的