本文選題：DC-DC開關(guān)變換器 + Saber仿真�。� 參考：《安徽大學》2014年碩士論文

【摘要】：在開關(guān)電源的設計過程中,開關(guān)變換器的建模和仿真是至關(guān)重要的一個環(huán)節(jié),精確的系統(tǒng)動態(tài)模型是設計出高質(zhì)量的閉環(huán)控制回路的基礎(chǔ),合理的閉環(huán)補償網(wǎng)絡是控制效果好壞的關(guān)鍵。借助于仿真軟件,對系統(tǒng)進行仿真則可以比較精確地預測系統(tǒng)的輸入輸出特性及動態(tài)性能,并能反復修改和優(yōu)化電路參數(shù),可以大大縮短開發(fā)時間。 本文先是系統(tǒng)介紹了PWM型DC/DC開關(guān)變換器的幾種基本拓撲,它們是組成各種開關(guān)電源主電路的基礎(chǔ),由它們可以延伸變化出許許多多的實際應用的開關(guān)電源拓撲。然后介紹了兩種最為常用的仿真方法即Simulink下的系統(tǒng)級仿真和專業(yè)仿真軟件Saber下的元件級仿真,本文中主要是用到了Saber仿真。介紹了PWM型DC/DC開關(guān)變換器的常見的幾種建模方法,并分別運用狀態(tài)平均法、電路平均法對全面考慮了實際電路寄生參數(shù)的Buck、Boost變換器進行了詳細建模,得到了考慮寄生參數(shù)、可以直接運用于工程實際的小信號模型,并在專業(yè)的電源仿真軟件Saber中通過網(wǎng)絡分析元件對環(huán)路掃頻,得到了實際的頻率特性以證實建模的正確性。研究了開關(guān)變換器閉環(huán)補償網(wǎng)絡的設計及運用Matlab及Matlab控制工具箱的Sisotool工具對開關(guān)變換器補償網(wǎng)絡進行設計的方法,總結(jié)和分析了不同控制模式下的補償方案,最后以CCM模式下電壓控制型Buck變換器為例,用傳統(tǒng)的配置零極點的方法,結(jié)合Sisotool強大的交互式功能設計了類型3補償網(wǎng)絡,同時還在Sisotool中運用PID調(diào)節(jié)自整定參數(shù)功能設計了PID補償網(wǎng)絡,并在Saber里分別對得到的實際電路進行了仿真,比較了兩種補償網(wǎng)絡的實際效果,指出了傳統(tǒng)配置零極點設計補償網(wǎng)絡方法的缺陷并提出了改進。
[Abstract]:In the design process of switching power supply, the modeling and simulation of switching converter is an important link, and the accurate dynamic model of the system is the basis of designing a high quality closed-loop control loop. A reasonable closed-loop compensation network is the key to the control effect. With the help of simulation software, the system can accurately predict the input and output characteristics and dynamic performance of the system, modify and optimize the circuit parameters repeatedly, and greatly shorten the development time. In this paper, several basic topologies of PWM type DC/DC switching converter are introduced systematically, which are the basis of the main circuit of various switching power supply, which can extend and change the switching power supply topology of many practical applications. Then two most commonly used simulation methods, system-level simulation under Simulink and component-level simulation under professional simulation software Saber, are introduced. Saber simulation is mainly used in this paper. This paper introduces several common modeling methods of PWM type DC/DC converter, and uses state averaging method and circuit average method to model the PWM boost converter which takes into account the parasitic parameters of the actual circuit in detail, and the parasitic parameters are taken into account. It can be directly applied to the small signal model of engineering practice, and the frequency characteristics of the loop can be obtained by the network analysis element in the professional power supply simulation software Saber to verify the correctness of the modeling. This paper studies the design of closed loop compensation network of switching converter and the method of designing the compensation network of switching converter using Sisotool tool of Matlab and Matlab control toolbox, and summarizes and analyzes the compensation scheme under different control modes. Finally, taking the voltage-controlled Buck converter in CCM mode as an example, the type 3 compensation network is designed by using the traditional method of collocating zero poles and combining the powerful interactive function of Sisotool. At the same time, the PID self-tuning parameter function is used to design the PID compensation network in Sisotool, and the actual circuit is simulated in Saber, and the actual results of the two compensation networks are compared. The defects of the traditional zero pole design compensation network method are pointed out and the improvement is put forward.
【學位授予單位】：安徽大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM46

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本文編號：1984082