最新畢業(yè)設(shè)計(jì)基于matlab的整流電路仿真分析-文庫吧在線文庫
【正文】 ional circuit analysis method appeared to be quite plicated, highpressure situations is difficult to experiments carried out smoothly. Matlab provides a visual simulation tool Simtlink circuit simulation model can be directly set up, free to change simulation parameters and immediately available to any of the simulation results, intuitive, eliminating the need for further programming steps. In this paper, Simulink full control of threephase bridge rectifier circuit model, for different control angle, the bridge under fault conditions were simulated analysis. Controlled singlephase bridge rectifier circuit parameters and the different nature of the work load of the parative analysis and research, both to further deepen the threephase fullcontrolled bridge rectifier circuit and controlled singlephase bridge rectifier circuit theory, while for modern power electronics experiment experimental teaching lay a good foundation.Keywords: Fullycontrolled, threephase, bridge, rectifier, circuit, singlephase, halfcontrolled rectifier bridge, singlephase fullcontrolled bridge, rectifier modeling, simulationⅡ第一章 三相橋式全控整流電路的仿真 隨著社會(huì)生產(chǎn)和科學(xué)技術(shù)的發(fā)展，整流電路在自動(dòng)控制系統(tǒng)、測量系統(tǒng)和發(fā)電機(jī)勵(lì)磁系統(tǒng)等領(lǐng)域的應(yīng)用日益廣泛。常用的整流電路有三相橋式全控整流電路和單相橋式可控電路。本文利用Simulink對(duì)三相橋式全控整流電路進(jìn)行建模，對(duì)不同控制角、橋故障情況下進(jìn)行了仿真分析，既進(jìn)一步加深了三相橋式全控整流電路的理論，同時(shí)也為現(xiàn)代電力電子實(shí)驗(yàn)教學(xué)奠定良好的實(shí)驗(yàn)基礎(chǔ)。α0時(shí)，Ud的波形出現(xiàn)缺口，隨著α角的增大，缺口增大，輸出電壓平均值降低。圖2 三相橋式全控整流電路仿真模型三相電源的相位互差120176。時(shí)的輸出電壓波形如圖3所示。時(shí)的輸出電壓波形圖 故障分析由于高壓強(qiáng)電流的情況，整流電路晶閘管很容易出現(xiàn)故障。 小結(jié) 通過仿真和分析，可知三相橋式全控整流電路的輸出電壓受控制角α和負(fù)載特性的影響，文中應(yīng)用Matlab的可視化仿真工具simulink對(duì)三相橋式全控整流電路的仿真結(jié)果進(jìn)行了詳細(xì)分析，并與相關(guān)文獻(xiàn)中采用常規(guī)電路分析方法所得到的輸出電壓波形進(jìn)行比較，進(jìn)一步驗(yàn)證了仿真結(jié)果的正確性。 圖9 單相橋式半控整流電路原理在u2正半周，觸發(fā)角α處給晶閘管VT1施加觸發(fā)脈沖，u2經(jīng)VT1和VD4向負(fù)載供電。圖10 單相橋式半控整流電路的仿真模型 單相橋式半控整流電路帶純電阻性負(fù)載情況相應(yīng)的參數(shù)設(shè)置：① 交流電壓源參數(shù)U=100V，f=50Hz；② 晶閘管參數(shù)Rn=，Lon=0H，Vf=，Rs=10Ω，Cs=250e6F；③ 負(fù)載參數(shù)R=10Ω，L=0H，C=inf；④ 脈沖發(fā)生器觸發(fā)信號(hào)2的振幅為5V，（即頻率為50Hz），脈沖寬度為15%。圖13 單相橋式全控整流電路上文已經(jīng)就單相橋式半控整流電路在純電阻性負(fù)載時(shí)進(jìn)行了較為詳盡的分析，而且全控電路與半控電路在純電阻性負(fù)載時(shí)的工作情況基本一致，同時(shí)晶閘管承受的最大正向電壓和反向電壓也同前述電路相同，分別為 和。 VT1和VT4組成一對(duì)橋臂，在u2正半周(即a點(diǎn)電位高于b點(diǎn)
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1