【摘要】：DC-DC變換器廣泛應(yīng)用到通信、計(jì)算機(jī)、家用電子產(chǎn)品和航天等領(lǐng)域中,隨著科技的發(fā)展,一些電子器件對(duì)電源的要求越來越高,如家用電子產(chǎn)品中需要用到電壓穩(wěn)定、內(nèi)阻極小、動(dòng)態(tài)性能優(yōu)良的便攜式電源。所以,研究高性能的DC-DC變換器已經(jīng)成為現(xiàn)代電源研究中的主要方向。本文在分析了DC-DC變換器的幾種常用數(shù)學(xué)模型的基礎(chǔ)上,將滑模變結(jié)構(gòu)控制理論應(yīng)用于DC-DC變換器設(shè)計(jì)中,設(shè)計(jì)了一臺(tái)基于DSP的滑�？刂艱C-DC變換器,主要工作如下： 首先,介紹了DC-DC變換器常用的線性控制策略和非線性控制策略的優(yōu)點(diǎn)和不足,以及DC-DC變換器的模擬和數(shù)字控制技術(shù)。以DC-DC變換器中的Buck變換器、Boost變換器、Buck-Boost變換器為例,分析了它們拓?fù)浣Y(jié)構(gòu)的特點(diǎn)和幾種常用建模方法,以及使用這些方法在設(shè)計(jì)DC-DC變換器時(shí)的一些局限。 其次,分析了滑模控制理論,將滑�？刂评碚搼�(yīng)用于Buck變換器,設(shè)計(jì)了一種使用固定頻率PWM波的滑�？刂品椒�,該方法不僅降低了功率開關(guān)的頻率,而且解決了開關(guān)的轉(zhuǎn)換速度對(duì)滑�？刂破餍阅艿挠绊憽Ｕ麄�(gè)系統(tǒng)包括主功率回路、電感電流檢測(cè)電路、電容電流檢測(cè)電路、DSP控制電路。 最后,完成整個(gè)系統(tǒng)的測(cè)試。實(shí)驗(yàn)結(jié)果表明,本文使用的基于PWM技術(shù)的變結(jié)構(gòu)滑模控制方法,很好的解決了開關(guān)切換速度對(duì)滑模變結(jié)構(gòu)控制的影響。在系統(tǒng)內(nèi)部參數(shù)變化時(shí)具有很好的魯棒性,且控制精度高,動(dòng)態(tài)響應(yīng)速度快。
[Abstract]:DC-DC converters are widely used in the fields of communication, computer, household electronics and spaceflight. With the development of science and technology, some electronic devices require more and more high power supply, such as voltage stability in household electronic products. Portable power supply with minimal internal resistance and excellent dynamic performance. Therefore, the research of high performance DC-DC converter has become the main research direction of modern power supply. Based on the analysis of several common mathematical models of DC-DC converter, the sliding mode variable structure control theory is applied to the design of DC-DC converter. A sliding mode control DC-DC converter based on DSP is designed. The main work is as follows: firstly, the advantages and disadvantages of linear and nonlinear control strategies used in DC-DC converters are introduced, as well as the analog and digital control techniques of DC-DC converters. Taking Buck converter, Boost converter and Buck-Boost converter in DC-DC converter as examples, the characteristics of their topological structure and several common modeling methods are analyzed, and some limitations of using these methods in designing DC-DC converter are analyzed. Secondly, the sliding mode control theory is analyzed, and the sliding mode control theory is applied to Buck converter. A sliding mode control method using fixed frequency PWM wave is designed, which not only reduces the frequency of power switch, but also reduces the frequency of power switch. Moreover, the effect of switching speed on the performance of sliding mode controller is solved. The whole system includes main power circuit, inductance current detection circuit, capacitive current detection circuit and DSP control circuit. Finally, the test of the whole system is completed. The experimental results show that the variable structure sliding mode control method based on PWM technology can solve the effect of switching speed on sliding mode variable structure control. It has good robustness, high control precision and fast dynamic response speed when the system parameters change.
【學(xué)位授予單位】：華中師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM46

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 賀明智;許建平;胡曉明;;基于FPGA的DC/DC開關(guān)變換器的數(shù)字控制器[J];電力電子技術(shù);2007年06期

2 李軍紅;王飛;李蘭君;;Buck變換器滑�？刂频难芯颗c實(shí)現(xiàn)[J];電源技術(shù);2010年02期

3 伍言真,丘水生,陳艷峰;DC/DC開關(guān)變換器滑模變結(jié)構(gòu)控制的新方案[J];電子學(xué)報(bào);2000年05期

4 張興,鞠建永,張崇巍;Boost-Buck型DC/DC變換器的滑模控制[J];合肥工業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版);2001年04期

5 孟光偉,瞿少成,蔡漢強(qiáng),姚瓊薈;基于離散變結(jié)構(gòu)控制的DC/DC變換器[J];控制理論與應(yīng)用;2003年01期

6 趙益波,羅曉曙,方錦清,汪秉宏;電壓反饋型DC-DC變換器的穩(wěn)定性研究[J];物理學(xué)報(bào);2005年11期

7 張方華,朱成花,嚴(yán)仰光;雙向DC-DC變換器的控制模型[J];中國電機(jī)工程學(xué)報(bào);2005年11期

8 馬皓;毛興云;徐德鴻;;兼顧電感電流連續(xù)導(dǎo)通和斷續(xù)運(yùn)行模式的DC/DC電路建模和參數(shù)辨識(shí)[J];中國電機(jī)工程學(xué)報(bào);2006年05期

9 張昌凡;滑模變結(jié)構(gòu)控制研究綜述[J];株洲工學(xué)院學(xué)報(bào);2004年02期

，

本文編號(hào)：2385996