【正文】 控制 瞬時(shí)反饋 鎖相環(huán) 限流IIAbstractThe inverters are widerly used in many important situation, where Fast response and little distorted output voltage is required. It is needed and significative to improve the quality of output voltage. This dissertation focuses on the output voltage control and some important function of three phase inverters. The followings are the main work:Three phase inverters are multiinput multioutput coupling systems. With the introduction of the concept of voltage space vector and coordinate transformation, it is possible to let threephase system transform among the different coordinates. Supposing load as disturbance, models in ABC three phase stator coordinate, two phase stator ??coordinate and twophase rotating coordinate are established. Using MATLAB, the dqinverter simulating model is established where dead time effect is the several affect output voltage reasons are analysed.To achieve high quality output voltage, diverse voltage waveform control techniques have been developed. Based on the characters of three phase systems in dq coordinate, repetitive control strategy is introduced and one repetitive controller is designed for a MATLAB,the simulation waves are got . With the mathmatics analysis and these waves ,the repetitive control faults that are slowly dynamic response and steady error are explained. one control strategy is present which is base ponent instantaneous feedback control model paralleling with harmonic ponent repetitive controller is given to solve these the output voltage of repetitive controller with instantaneous feedback controller paralleling with repetitive controller, the merits of instantaneous feedback controller paralleling with repetitive controller are pointed out.In order to safely supply power to load ,the inverter functions of switching and current limiting are designed. Two inverters use the digital phase lock loop to ensure they have accord phase. The paper analyzed the main cause causing the magic bias and proposed a sofware method. Experimental result proves that the proposed method is very simple and practical and the system quality and reliability is improved.Keywords: threephase inverter repetitive control instantaneous feedback control digital phase lock loop current limitingIII目 錄摘要 ....................................................................................................................IABSTRACT......................................................................................................II1 緒論 電力電子技術(shù) ..........................................................................................(1) 逆變器概述 ..............................................................................................(1) 逆變器的控制技術(shù) ..................................................................................(5) 本文研究的主要內(nèi)容 ............................................................................(11)2 PWM 逆變器的數(shù)學(xué)模型 三相逆變器的數(shù)學(xué)模型 ........................................................................(12) 三相逆變器的仿真 ................................................................................(18) 逆變器存在的問(wèn)題 ................................................................................(21) 本章小結(jié) ................................................................................................(23)3 逆變器波形控制研究 重復(fù)控制理論 ........................................................................................(24) 常用的重復(fù)控制器 ................................................................................(25) 重復(fù)控制器的設(shè)計(jì)與仿真 ....................................................................(28) 重復(fù)控制器的缺點(diǎn) ................................................................................(34) 改進(jìn)的重復(fù)控制 ....................................................................................(36) 本章小結(jié) ................................................................................................(42)4 逆變器的輔助功能 逆變器切換技術(shù) ....................................................................................(43)IV 逆變器抗沖擊保護(hù)的功能 ....................................................................(47) 逆變器抗直流偏磁 ................................................................................(50) 本章小結(jié) ................................................................................................(54)5 全文總結(jié) .................................................................................................(56)致謝 ...............................................................................................................(58)參考文獻(xiàn) .......................................................................................................(59)附錄 攻讀碩士學(xué)位期間發(fā)表的論文 .......................................................(63)11 緒 論 電力電子技術(shù)電力電子技術(shù)（Power Electronics）是二十一世紀(jì)重要的關(guān)鍵技術(shù)之一。隨著科學(xué)技術(shù)的發(fā)展，電力電子技術(shù)又與現(xiàn)代控制理論、材料科學(xué)、電機(jī)工程、微電子技術(shù)等許多領(lǐng)域密切相關(guān)。其后出現(xiàn)的功率場(chǎng)控晶體管、絕緣門(mén)極晶體管等形成了一個(gè)新的全控型器件大家族。在各種電力電子裝置中，逆變電源是應(yīng)用范圍最廣的，直接 DC/AC 變換或間接 AC/AC 變換的場(chǎng)合，都需要逆變電源。逆變器的應(yīng)用如此廣泛，類型也很多。3. 按逆變器的結(jié)構(gòu)，可以分為單相半橋、單相全橋、推挽式、三相橋式逆變器4. 依據(jù)開(kāi)關(guān)器件及其關(guān)斷（換流）方式的不同可分為采用全控型開(kāi)關(guān)的自關(guān)斷換流逆變器和采用晶閘管半控型開(kāi)關(guān)的強(qiáng)迫關(guān)斷晶閘管逆變器兩類。早期，中高功率逆變器采用晶閘管開(kāi)關(guān)器件，晶閘管一旦導(dǎo)通就不能自行關(guān)斷，關(guān)斷晶閘管需要設(shè)置強(qiáng)迫關(guān)斷（換流）電路。本文主要研究恒壓恒頻的電壓型逆變器，以后所指逆變器如沒(méi)有特殊說(shuō)明都是這種逆變器。由圖 11 可見(jiàn)，當(dāng)開(kāi)關(guān) SS4導(dǎo)通，SS3 關(guān)斷時(shí)，輸出端可獲得正極性的瞬時(shí)電壓；而當(dāng) SS3導(dǎo)通， S S4 關(guān)斷時(shí)，輸出端即獲得負(fù)極性的瞬時(shí)電壓。如果在 期間，SS40t???有門(mén)極驅(qū)動(dòng)信號(hào)而同時(shí)處于通態(tài)，SS3 截止，則 ；在VUd?期間，S2 、S3 有門(mén)極驅(qū)2t?動(dòng)信號(hào)而同時(shí)處于通態(tài)，T T 4 截止，則 。而在實(shí)際應(yīng)用中通常希望逆變器輸出電壓、功率以及頻率能夠得到有效的控制和調(diào)節(jié)。因此只要對(duì)逆變器的開(kāi)關(guān)器件進(jìn)行適當(dāng)?shù)目刂?，使得每個(gè)脈波的平均電壓、脈波寬或占空比按一定的規(guī)律變化，則逆變電路輸出的多脈波電壓就能與正弦電壓等效。與模擬控制相比，PWM 逆變電源采用全數(shù)字化控制具有以下明顯優(yōu)勢(shì) [4]：(1) 溫度漂移小，抗干擾能力強(qiáng)，可靠性高，穩(wěn)定性好。5) 具有一定的過(guò)載能力和抗沖擊的能力；6) 體積小，重量輕，盡可能高頻化、小型化、輕量化；7) 低的電磁干擾；8) 模塊化和并聯(lián)冗余式供電系統(tǒng)用以擴(kuò)大總?cè)萘亢吞岣呖煽啃裕鄳?yīng)的控制電路應(yīng)包含均流控制電路；9) 智能化；10) 完善的網(wǎng)絡(luò)功能為了滿足逆變器的這些要求產(chǎn)生了很多適合逆變器的控制技術(shù)。數(shù)字控制相對(duì)于模擬控制，有一系列的優(yōu)點(diǎn)：(1) 硬件電路通用化、標(biāo)準(zhǔn)化，可靠性提高；(2) 緩和了元器件老化，參數(shù)漂移等問(wèn)題；(3) 控制軟件靈活，可以實(shí)現(xiàn)復(fù)雜而性能優(yōu)異的控制策略；(4) 借助其數(shù)字通信端口，可以實(shí)現(xiàn)計(jì)算機(jī)控制和網(wǎng)絡(luò)監(jiān)控。6? 兩組各 8 路并行 10 位高速 A/D 轉(zhuǎn)化器。 控制策略電力電子技