三相SPWM變頻電源設(shè)計(jì)

全文55頁(yè) 28000字 設(shè)計(jì)獨(dú)特 論述精確

摘 要

本設(shè)計(jì)的題目來(lái)源于生產(chǎn)實(shí)際，主要內(nèi)容是用微型計(jì)算機(jī)作為控制器，結(jié)合專用的SPWM集成電路，設(shè)計(jì)交流變頻電源。
主電路形式采用AC-DC-AC三相逆變電路,主開(kāi)關(guān)器件選用IGBT單元模塊加上并聯(lián)緩沖電路構(gòu)成。輸入端加入三相全波不可控整流電路，提高了輸入逆變器的電網(wǎng)質(zhì)量。逆變器的輸出濾波采用了新型三相逆變器輸出濾波器, 它由RLC濾波器和LC陷波濾波器串聯(lián)組成，濾波效果很好。
控制電路由MCS-51系列的8051單片機(jī)最小系統(tǒng)和SA4828三相SPWM產(chǎn)生器及少量的擴(kuò)展外圍芯片構(gòu)成。
8051單片機(jī)除完成對(duì)SA4828的初始化、輸出脈寬控制、頻率控制外,同時(shí)完成模擬信號(hào)與數(shù)字信號(hào)的檢測(cè)、保護(hù)功能的邏輯判斷等。由于SA4828和單片機(jī)使用同一個(gè)晶體振蕩器,故同步性能穩(wěn)定,漂移小。
關(guān)鍵詞：?jiǎn)纹瑱C(jī)；正弦脈寬調(diào)制；變頻電源；絕緣柵雙極晶閘管

Abstract

The topic of this design stems from production reality; it is to use the microcomputer as controller. Combine special-purpose SPWM integrated circuit designs alternating inverter power supply.
Its form of the main circuit adopts AC-DC-AC three phases inverter circuit, the main switch devices consist of IGBTS and a parallel buffer circuit .the systematic of the cost and go against the becoming device , adding three-phase the whole wave uncontrolled rectification circuit to input , improves the quality of the electric which is supplied to inverter. Output filter of inverter adopts a new-type filter, which is consist of RLC filter and LC filter. Its result is very good.
The control circuit consist of is 8051 single-chip microcomputer minimum system of MCS-51 series and three phases SPWM generate integrated circuit SA4828 and a small amount of peripheral chip of expansion.
8051 single-chip microcomputer realizes the initialization of SA4828, the control of the output pulse width and frequency. Finish measuring of the analog signal and digital signal, logic of protecting the function to judge etc. at the same time. Because SA4828 and single-chip computer use the same crystal oscillator, so synchronous performance is steady.
Keywords: single-chip microcomputer; SPWM; inverter power supply; IGBT

目 錄

摘要 Ⅰ
Abstract Ⅱ
第1章 緒論 1
1.1 變頻技術(shù)概述 1
1.2變頻技術(shù)在電源設(shè)備上的應(yīng)用 2
1.3 變頻電源的發(fā)展方向 2
1.4 畢業(yè)設(shè)計(jì)主要研究?jī)?nèi)容 3
第2章 變頻電源的結(jié)構(gòu)選擇及方案設(shè)計(jì) 5
2.1 變頻電源結(jié)構(gòu)選擇 5
2.2 系統(tǒng)結(jié)構(gòu)設(shè)計(jì) 9
第3章 主電路的設(shè)計(jì) 11
3.1 整流電路主電路 11
3.2 濾波電路 12
3.3 逆變器主電路 12
3.4 輸出濾波電路 20
第4章 控制系統(tǒng)硬件設(shè)計(jì) 21
4.1 SPWM控制技術(shù) 21
4.2 MCS-51單片機(jī)簡(jiǎn)介 26
4.3 SA4828芯片介紹 28
4.4 SA4828的控制方法 31
4.5 IGBT驅(qū)動(dòng)電路設(shè)計(jì) 35
4.6 電壓及頻率反饋電路 39
4.7 鍵盤(pán)及顯示電路 43
第5章 系統(tǒng)軟件的設(shè)計(jì) 46
5.1 主程序設(shè)計(jì) 46
5.2 中斷程序設(shè)計(jì) 47
結(jié)論 49
參考文獻(xiàn) 50
致謝 51

部分參考文獻(xiàn)

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[11] 何立民.單片機(jī)應(yīng)用文集[M].北京:北京航空航天大學(xué)出版社,1991
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