單片機(jī)控制的三相全控橋觸發(fā)系統(tǒng)設(shè)計(jì)

電子機(jī)電論文編號(hào):JD756  設(shè)計(jì)字?jǐn)?shù):20823,頁(yè)數(shù):73

 目  錄
摘要………………………………………………………………………………………Ⅰ
Abstract………………………………………………………………………………Ⅱ
引言…………………………………………………………………………………1
 1．1   研究背景和意義………………………………………………………………1
     1．1．1  晶閘管的發(fā)展現(xiàn)狀…………………………………………………1
1．1．2  電力電子技術(shù)的前景………………………………………………………2
1．1．3  晶閘管的應(yīng)用………………………………………………………………2

第二章  三相可控整流電路晶閘管的介紹……………………………………………5
 2．1   三相橋式整流電路晶閘管的特征……………………………………………5
2．1．1  晶閘管的開關(guān)特點(diǎn)…………………………………………………………5
     2．1．2  晶閘管的幾種導(dǎo)通方式……………………………………………6
 2．1．3  晶閘管的基本特性…………………………………………………………6
2．1．4  晶閘管的觸發(fā)………………………………………………………………6
第三章    三相橋式全控整流電路……………………………………………………7
3．1     三相橋式全控整流電路電阻性負(fù)載………………………………………7
3．2    三相橋式全控整流電路電感性負(fù)載………………………………………12
第四章  AT89C52芯片介紹…………………………………………………………16
4．1  AT89C52主要性能參數(shù)………………………………………………………16
4．2  AT89C52引腳及內(nèi)部器件功能說(shuō)明…………………………………………17
第五章  控制系統(tǒng)原理………………………………………………………………45
5．1    系統(tǒng)結(jié)構(gòu)框圖………………………………………………………………45
5．2  觸發(fā)器硬件組成………………………………………………………………45
5．3  移相觸發(fā)脈沖的控制原理……………………………………………………47
第六章  系統(tǒng)硬件電路器件選擇……………………………………………………50
 6．1  晶閘管的參數(shù)及其選擇……………………………………………………50
 6．1．1   晶閘管及平波電抗器…………………………………………………50
 6．1．2   晶閘管的保護(hù)…………………………………………………………51
 6．2  具體器件的計(jì)算與選擇……………………………………………………52
第7章  軟件設(shè)計(jì)……………………………………………………………………58
7．1   觸發(fā)脈沖控制軟件的設(shè)計(jì)………………………………………………58
7．2   軟件控制程序清單………………………………………………………57
結(jié)論…………………………………………………………………………………65
致謝…………………………………………………………………………………66
參考文獻(xiàn)……………………………………………………………………………67

摘要
 電子技術(shù)的應(yīng)用已深入到工農(nóng)業(yè)經(jīng)濟(jì)建設(shè)，交通運(yùn)輸，空間技術(shù)，國(guó)防現(xiàn)代化，醫(yī)療，環(huán)保，和人們?nèi)粘Ｉ�活的各個(gè)領(lǐng)域，進(jìn)入新世紀(jì)后電力電子技術(shù)的應(yīng)用更加廣泛，因此對(duì)電力電子技術(shù)的研究更為重要。近幾年越來(lái)越多電力電子應(yīng)用在國(guó)民工業(yè)中，一些技術(shù)先進(jìn)的國(guó)家，經(jīng)過(guò)電力電子技術(shù)處理的電能己達(dá)到總電能的一半以上。
 本文主要介紹基于MCS—51系列單片機(jī)AT89C52芯片控制的三相橋式全控整流電路的主電路和觸發(fā)電路的原理及控制電路，軟件部分由C51高級(jí)語(yǔ)言編程。具體運(yùn)行由工頻三相電壓經(jīng)變壓器后在芯片控制下在不同的時(shí)刻發(fā)出不同的脈沖信號(hào)去控制相應(yīng)的SCR可控硅整流為直流電給負(fù)載供電。此種控制方式其主要優(yōu)點(diǎn)是輸出波形穩(wěn)定和可靠性高抗干擾強(qiáng)的特點(diǎn)。觸發(fā)電路結(jié)構(gòu)簡(jiǎn)單，控制靈活，溫度影響小，控制精度可通過(guò)軟件補(bǔ)償，移相范圍可任意調(diào)節(jié)等特點(diǎn)，目前已獲得業(yè)界的廣泛認(rèn)可。并將在很多的工業(yè)控制中得到很好的運(yùn)用。

關(guān)鍵詞：晶閘管   MCS—51單片機(jī)    觸發(fā)角   同步信號(hào) 

 The single-chip microcomputer control 3-phases full controlled trigger system design
 Abstract
 The application of electronic technology has deep into the agricultural economic construction, transportation, space technology, national defense modernization, medical, environmental protection, and People's Daily life in all areas, enter the new century power electronic technology, so more widely in power electronic technology research is more important. In recent years, more and more application in the national power electronics industry, some advanced technologies of the country, after processing of electric power electronic technology has reached more than half the total energy.
 This paper mainly introduces the MCU based on MCS - 51 series three-phase AT89C52 chip controlled rectifier bridge type all control circuit and the circuit principle of trigger circuit and control circuit and software consists of senior programming language C51. Specific operation by frequency voltage transformer in the three-phase after under control chip at different moments of the pulse signal to control the SCR silicon rectifier is corresponding to load power DC. The control mode is the main advantages of high stability and reliability of output waveform characteristics of strong anti-jamming. Trigger circuit structure is simple, flexible control, temperature, control accuracy can be compensated by software, can adjust arbitrarily limits have won the wide recognition. And in many industrial control will get to good use.
 Keywords:  thyrister   MCS - 51 single-chip Microcontroller   triggering Angle  synchronous signal