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1、控制系統(tǒng)課程設(shè)計(jì)設(shè)計(jì)題目：H型雙極式PWM直流調(diào)速系統(tǒng)設(shè)計(jì)19河北理工大學(xué)本科生課程設(shè)計(jì)成績(jī)總評(píng)表學(xué)生姓名設(shè)計(jì)總成績(jī)?cè)O(shè)計(jì)題目H型雙極式PWM直流調(diào)速系統(tǒng)設(shè)計(jì)說(shuō)明書(shū)評(píng)定成績(jī)答辯成績(jī)答辯時(shí)需要設(shè)計(jì)人回答的問(wèn)題注：設(shè)計(jì)總成績(jī)=說(shuō)明書(shū)評(píng)定成績(jī)（60%）＋答辯成績(jī)（40%）19設(shè)計(jì)任務(wù)書(shū)(一)性能指標(biāo)要求：穩(wěn)態(tài)指標(biāo)：系統(tǒng)無(wú)靜差動(dòng)態(tài)指標(biāo)：；空載起動(dòng)到額定轉(zhuǎn)速時(shí)。(二)給定電機(jī)及系統(tǒng)參數(shù)：PN=220W,UN=48V,IN=3.7A,，nN=200r/min，Ra=6.5Ω電樞回路總電阻R=8Ω電樞回路總電感L=120mH電機(jī)飛輪慣量GD2=1
2、.29Nm2(三)設(shè)計(jì)步驟及說(shuō)明書(shū)要求：1畫(huà)出系統(tǒng)結(jié)構(gòu)圖，并簡(jiǎn)要說(shuō)明工作原理。2根據(jù)給定電機(jī)參數(shù)，設(shè)計(jì)整流變壓器，并計(jì)算變壓器容量及副邊電壓值;選擇整流二極管及開(kāi)關(guān)管的參數(shù)，并確定過(guò)流、過(guò)壓保護(hù)元件參數(shù)。3分析PWM變換器，脈寬調(diào)制器（UPW）及邏輯延時(shí)（DLD）工作原理。4設(shè)計(jì)ACR、ASR并滿(mǎn)足給定性能指標(biāo)要求。5完成說(shuō)明書(shū)，對(duì)構(gòu)成系統(tǒng)的各環(huán)節(jié)分析時(shí)，應(yīng)先畫(huà)出本環(huán)節(jié)原理圖，對(duì)照分析。6打印說(shuō)明書(shū)（A4），打印電氣原理圖（A4）。19目錄一引言···········································
3、····1二系統(tǒng)構(gòu)成和原理···································1三PWM主電路設(shè)計(jì)····································3四電流調(diào)節(jié)器和轉(zhuǎn)速調(diào)節(jié)器的設(shè)計(jì)····················44.1電流調(diào)節(jié)器ACR的設(shè)計(jì)·································44.2轉(zhuǎn)速調(diào)節(jié)器ASR設(shè)計(jì)····································44.2.1電流環(huán)等效閉環(huán)傳遞函數(shù)·······················
4、·····74.2.2轉(zhuǎn)速調(diào)節(jié)器結(jié)構(gòu)的選擇······························84.2.3時(shí)間常數(shù)的確定····································84.2.4轉(zhuǎn)速調(diào)節(jié)器參數(shù)的選擇······························84.2.5校驗(yàn)近似條件······································84.2.6校核轉(zhuǎn)速超調(diào)量····································84.2.7轉(zhuǎn)速調(diào)節(jié)器的實(shí)現(xiàn)·········
5、·························9五基于SG3525為核心構(gòu)成的控制電路··················95.1SG3525芯片的內(nèi)部結(jié)構(gòu)及工作原理························9195.2邏輯延時(shí)環(huán)節(jié)···········································10六驅(qū)動(dòng)電路設(shè)計(jì)········································11七電流反饋和轉(zhuǎn)速反饋電路設(shè)計(jì)························127.1電流反饋電路設(shè)計(jì)··
6、·····································127.2轉(zhuǎn)速反饋電路設(shè)計(jì)········································13八結(jié)束語(yǔ)·················································13九參考文獻(xiàn)···············································15十總電路圖……………………………………………………161引言19直流電動(dòng)機(jī)由于有著廣泛的起制動(dòng)性能，宜于在廣泛范圍內(nèi)平滑調(diào)速，且直流拖
7、動(dòng)系統(tǒng)在理論上和實(shí)踐上都比較成熟，因而目前應(yīng)用廣泛。直流電機(jī)在一定范圍內(nèi)無(wú)極平滑調(diào)速系統(tǒng)來(lái)說(shuō)，以調(diào)節(jié)電樞電壓的方式最好。直流PWM調(diào)速系統(tǒng)作為一種新技術(shù)，發(fā)展迅速，應(yīng)用日益廣泛，特別在中、小容量的系統(tǒng)中，已取代V-M系統(tǒng)成為主要的直流調(diào)速方式。脈寬調(diào)速實(shí)質(zhì)上是調(diào)壓調(diào)速方式中的一種，它采用全控型電力電子器件組成的直流脈沖調(diào)制型的調(diào)速系統(tǒng)已發(fā)展成熟，用途越來(lái)越廣，與傳統(tǒng)的V-M系統(tǒng)相比，在很多方面有很大的優(yōu)越性。雙極式控制的橋式可逆PWM變換器有下列優(yōu)點(diǎn)：（1）電流一定連續(xù)；（2）可使電機(jī)在四象限運(yùn)行；（3）電機(jī)停止時(shí)有微振電流，能消
8、除靜摩擦死區(qū)；（4）低速平穩(wěn)性好，系統(tǒng)的調(diào)速范圍可達(dá)1:20000左右；（5）低速時(shí)，每個(gè)開(kāi)關(guān)器件的驅(qū)動(dòng)脈沖仍較寬，有利于保證器件的可靠導(dǎo)通。雙極式控制方式的不足之處是：在工作過(guò)程中，4個(gè)開(kāi)關(guān)器件可能都處于開(kāi)關(guān)狀態(tài)，開(kāi)關(guān)損耗大，而且在切換時(shí)可能發(fā)生
