【摘要】：開關(guān)電源頻率越來越高,分立EMI濾波器體積較大,其中的寄生電感、寄生電容參數(shù)在一定程度上干擾了電路的高頻特性,其中高頻特性是較嚴(yán)重的電磁干擾,其中EMI濾波器消除作用將在一定程度上降低開關(guān)電源的高頻特性。本文研究的EMI濾波器結(jié)構(gòu)采用分立結(jié)構(gòu)集成而成,從減小體積和提高功率密度的角度提出了增加電感線圈的方式來減小元件的寄生參數(shù)的影響,并用PSpice仿真軟件對(duì)等效模型參數(shù)進(jìn)行仿真研究,同時(shí)進(jìn)行試驗(yàn)樣機(jī)驗(yàn)證分析,通過分析可知,該型結(jié)構(gòu)濾波器寄生參數(shù)較低,在工程上滿足一定要求,能獲得較高的高頻性能,元件體積也大幅較少。主要工作可概括為：(1)首先介紹了EMI濾波器在電力電子發(fā)展中的相關(guān)應(yīng)用研究背景以及平面集成EMI濾波器發(fā)展?fàn)顩r的概述。(2)其次利用磁路分析法原理,分別分析該電感集成EMI濾波器的消除原理分析,建立了二端口網(wǎng)絡(luò)理論和等效電路模型,提出該模型參數(shù)的消除原理和消除方法,并利用電磁場(chǎng)有限元計(jì)算和實(shí)驗(yàn)測(cè)試方法提取了電磁參數(shù),推導(dǎo)得到了插入損耗計(jì)算公式,得到該模型插入損耗曲線,并進(jìn)行實(shí)驗(yàn)驗(yàn)證分析研究。(3)研究了該特殊結(jié)構(gòu)的差共模電感EMI濾波器平面化結(jié)構(gòu),得到平面化集成化插入電感電路的集成化結(jié)構(gòu),利用該平面無源集成方法,制作了試驗(yàn)樣機(jī),仿真結(jié)果和實(shí)驗(yàn)分析證明該濾波電路寄生參數(shù)消除方法的有效性。
[Abstract]:The frequency of switching power supply is getting higher and higher, and the discrete EMI filter is larger in size. The parasitic inductance and parasitic capacitance parameters interfere with the high frequency characteristic of the circuit to some extent, among which the high frequency characteristic is the serious electromagnetic interference. The elimination of EMI filter will reduce the high frequency characteristic of switching power supply to some extent. The structure of EMI filter studied in this paper is integrated with discrete structure. In order to reduce the influence of parasitic parameters of the element, the way of increasing inductance coil is put forward in order to reduce the volume and increase the power density. PSpice simulation software is used to simulate the equivalent model parameters. At the same time, the experimental prototype is verified and analyzed. Through the analysis, it can be known that the parasitic parameters of this type of structural filter are lower, meet certain requirements in engineering, and can obtain higher high frequency performance. Components are also substantially smaller in volume. The main work can be summarized as follows: (1) the background of the application of EMI filter in power electronics development and the development of planar integrated EMI filter are introduced. (2) secondly, the principle of magnetic circuit analysis is used. The elimination principle of the inductor integrated EMI filter is analyzed, the two-port network theory and equivalent circuit model are established, and the elimination principle and method of the model parameters are presented. The electromagnetic parameters are extracted by means of finite element calculation and experimental test of electromagnetic field. The formula of insertion loss is derived, and the insertion loss curve of the model is obtained. Experimental verification and analysis are carried out. (3) the planar structure of the differential common-mode inductor EMI filter with special structure is studied, and the integrated structure of the planar integrated insertion inductor circuit is obtained, and the planar passive integration method is used. The experimental prototype is made and the simulation results and experimental analysis prove the effectiveness of the method of eliminating parasitic parameters of the filter circuit.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN713

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