本文選題：逆變 + SPWM　； 參考：《昆明理工大學(xué)》2014年碩士論文

【摘要】：科學(xué)技術(shù)日新月異的今天,電力電子技術(shù)也在不斷創(chuàng)新,隨著高性能低成本數(shù)字處理器的問世,傳統(tǒng)的模擬電路逐漸被數(shù)字電路取代。在逆變電源領(lǐng)域,傳統(tǒng)的模擬控制器已經(jīng)暴露了它固有缺陷,而數(shù)字控制器不僅能彌補它的缺陷且更容易實現(xiàn)先進的控制技術(shù)。因此,逆變電源數(shù)字化已成為當前逆變領(lǐng)域的發(fā)展趨勢。由于400Hz中頻電源在軍事和民航領(lǐng)域的市場需求在不斷增大,因此,高質(zhì)量、高性能的400Hz中頻逆變電源成為電源領(lǐng)域研究的又一個熱點。本文采用了高性能的數(shù)字處理器TMS320F28335作為主控制器,并在此基礎(chǔ)上對單相400Hz中頻逆變電源進行研究與實現(xiàn)。 首先,本文討論了單相逆變電源的工作原理,針對其調(diào)制方式選擇了SPWM調(diào)制中的單極性、雙極性和單極倍頻進行對比分析,最終選擇了單極性倍頻SPWM調(diào)制方式。通過對比分析對稱規(guī)則采樣法和不對稱規(guī)則采樣法,并對這兩方法產(chǎn)生的SPWM脈寬進行了定量計算,綜合考慮后選擇不對稱規(guī)則采樣法來實現(xiàn)數(shù)字化SPWM。在單極性倍頻調(diào)制下系統(tǒng)開關(guān)頻率在原來基礎(chǔ)上可以提高一倍,使得逆變電源輸出的脈動電壓頻率提高一倍,有利于減小輸出濾波器的體積,增強濾波效果,同時也減小了系統(tǒng)諧波含量,提高輸出電能的質(zhì)量。不對稱規(guī)則采樣法不僅可以使得系統(tǒng)采樣頻率增加一倍,提高了系統(tǒng)的控制精度而且可以消除偶次諧波,很好的改善輸出波形的質(zhì)量。 然后,本文在逆變電源數(shù)字控制技術(shù)上采用電壓、電流瞬時值雙閉環(huán)反饋與數(shù)字PID相結(jié)合,并對其進行相關(guān)的數(shù)學(xué)建模,給出相關(guān)傳遞函數(shù)并對其進行分析。PID實現(xiàn)數(shù)字化后對其積分項進行分離改進使其更符合本系統(tǒng)的實際需求,并推導(dǎo)出數(shù)字PID相關(guān)參數(shù)整定的方法。通過對這種控制技術(shù)的分析可以得出：電壓、電流雙閉環(huán)反饋PID控制技術(shù)可以提高逆變電源系統(tǒng)動態(tài)特性,減小穩(wěn)態(tài)誤差,提高輸出波形的質(zhì)量。 最后,本文根據(jù)上述方案完成了整個400Hz逆變系統(tǒng)的硬件設(shè)計,并對硬件設(shè)計中相關(guān)的重要參數(shù)進行理論上的推算,并不斷在實驗中微調(diào)校準。同時也完成了整個系統(tǒng)的軟件設(shè)計,針對SPWM的軟件實現(xiàn)作了具體的闡述。通過對實驗調(diào)試中得到的相關(guān)波形和數(shù)據(jù)的分析,表明本系統(tǒng)設(shè)計是合理可靠的,且輸出波形的質(zhì)量得到很好的改善。
[Abstract]:With the rapid development of science and technology, power electronics technology is constantly innovating. With the advent of high performance and low cost digital processors, traditional analog circuits are gradually replaced by digital circuits. In the field of inverter power supply, the traditional analog controller has exposed its inherent defects, but the digital controller can not only make up for its defects, but also realize the advanced control technology more easily. Therefore, the digitization of inverter power supply has become the current trend of development in the field of inverter. Due to the increasing market demand of 400Hz intermediate frequency power supply in the military and civil aviation fields, the high quality and high performance 400Hz intermediate frequency inverter power supply has become another hot spot in the field of power supply. In this paper, the high performance digital processor (TMS320F28335) is used as the main controller, and on this basis, the single-phase 400Hz if inverter is studied and implemented. Firstly, the working principle of single-phase inverter power supply is discussed. Unipolarity, bipolarity and unipolar frequency doubling in SPWM modulation are selected for its modulation mode. Finally, unipolar frequency doubling SPWM modulation mode is chosen. The symmetrical regular sampling method and the asymmetric regular sampling method are compared, and the SPWM pulse width produced by these two methods is calculated quantitatively. After considering the asymmetric regular sampling method, the digitized SPWM is realized. Under unipolar frequency doubling modulation, the switching frequency of the system can be doubled on the original basis, and the pulsating voltage frequency of the inverter power output can be doubled, which is helpful to reduce the volume of the output filter and enhance the filtering effect. At the same time, it also reduces the harmonic content of the system and improves the quality of the output power. The asymmetric regular sampling method can not only double the sampling frequency of the system, but also improve the control accuracy of the system, eliminate even harmonics, and improve the quality of the output waveform. Then, this paper combines voltage and current double closed loop feedback with digital PID in the digital control technology of inverter power supply, and carries on the related mathematical modeling to it. The correlation transfer function is given and analyzed. Pid is digitized and the integral term is separated and improved to meet the actual needs of the system. The method of setting the relevant parameters of digital PID is deduced. Through the analysis of this control technology, it can be concluded that the voltage and current double closed-loop feedback PID control technology can improve the dynamic characteristics of the inverter power supply system, reduce the steady-state error and improve the quality of the output waveform. Finally, according to the above scheme, the hardware design of the whole 400Hz inverter system is completed, and the related important parameters in the hardware design are calculated theoretically, and calibrated continuously in the experiment. At the same time, the software design of the whole system is completed, and the software implementation of SPWM is expounded. The analysis of the relevant waveforms and data obtained in the experiment and debugging shows that the design of the system is reasonable and reliable, and the quality of the output waveforms has been improved very well.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM464

【參考文獻】

相關(guān)期刊論文 前10條

1 謝力華,蘇彥民;正弦波逆變電源的數(shù)字控制技術(shù)[J];電力電子技術(shù);2001年06期

2 孫佩石,何慶領(lǐng);具有最大功率跟蹤功能的光伏戶用逆變電源[J];合肥工業(yè)大學(xué)學(xué)報(自然科學(xué)版);2001年06期

3 穆新華,葛紅娟;基于重復(fù)控制技術(shù)的單相航空靜止變流器的研究[J];航空學(xué)報;2005年04期

4 盧慧芬;基于DSP的SPWM控制波形生成的一種方法[J];機電工程;2002年05期

5 俞楊威;金天均;謝文濤;呂征宇;;基于PWM逆變器的LC濾波器[J];機電工程;2007年05期

6 黃西平;劉春瑞;;單相正弦波逆變電源波形控制技術(shù)的研究[J];計算機仿真;2009年09期

7 魏尚明,何紹雄,陳國雄;補償擾動的 PWM 逆變器無差拍控制[J];上海交通大學(xué)學(xué)報;1998年06期

8 董金發(fā);王三武;;基于DSP正弦脈寬調(diào)制的單相逆變電源研究[J];通信電源技術(shù);2006年04期

9 易龍強;戴瑜興;郜克存;;一種基于DSP的(可變頻)異步調(diào)制算法[J];湖南科技大學(xué)學(xué)報(自然科學(xué)版);2006年03期

10 李子欣;王平;李耀華;朱海濱;勝曉松;高范強;;采用數(shù)字控制的400Hz大功率逆變電源[J];中國電機工程學(xué)報;2009年06期

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