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1、控制系統(tǒng)課程設(shè)計設(shè)計題目：H型雙極式PWM直流調(diào)速系統(tǒng)設(shè)計19河北理工大學(xué)本科生課程設(shè)計成績總評表學(xué)生姓名設(shè)計總成績設(shè)計題目H型雙極式PWM直流調(diào)速系統(tǒng)設(shè)計說明書評定成績答辯成績答辯時需要設(shè)計人回答的問題注：設(shè)計總成績=說明書評定成績（60%）＋答辯成績（40%）19設(shè)計任務(wù)書(一)性能指標要求：穩(wěn)態(tài)指標：系統(tǒng)無靜差動態(tài)指標：；空載起動到額定轉(zhuǎn)速時。(二)給定電機及系統(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電機飛輪慣量GD2=1.29Nm2(三)設(shè)計步驟
2、及說明書要求：1畫出系統(tǒng)結(jié)構(gòu)圖，并簡要說明工作原理。2根據(jù)給定電機參數(shù)，設(shè)計整流變壓器，并計算變壓器容量及副邊電壓值;選擇整流二極管及開關(guān)管的參數(shù)，并確定過流、過壓保護元件參數(shù)。3分析PWM變換器，脈寬調(diào)制器（UPW）及邏輯延時（DLD）工作原理。4設(shè)計ACR、ASR并滿足給定性能指標要求。5完成說明書，對構(gòu)成系統(tǒng)的各環(huán)節(jié)分析時，應(yīng)先畫出本環(huán)節(jié)原理圖，對照分析。6打印說明書（A4），打印電氣原理圖（A4）。19目錄一引言···············································1二系統(tǒng)構(gòu)成和原理·············
3、······················1三PWM主電路設(shè)計····································3四電流調(diào)節(jié)器和轉(zhuǎn)速調(diào)節(jié)器的設(shè)計····················44.1電流調(diào)節(jié)器ACR的設(shè)計·································44.2轉(zhuǎn)速調(diào)節(jié)器ASR設(shè)計····································44.2.1電流環(huán)等效閉環(huán)傳遞函數(shù)····························74.2.2轉(zhuǎn)速調(diào)節(jié)器結(jié)構(gòu)的選擇··················
4、············84.2.3時間常數(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)器的實現(xiàn)··································9五基于SG3525為核心構(gòu)成的控制電路·······
5、···········95.1SG3525芯片的內(nèi)部結(jié)構(gòu)及工作原理························9195.2邏輯延時環(huán)節(jié)···········································10六驅(qū)動電路設(shè)計········································11七電流反饋和轉(zhuǎn)速反饋電路設(shè)計························127.1電流反饋電路設(shè)計·······································127.2轉(zhuǎn)速反饋電路設(shè)計···············
6、·························13八結(jié)束語·················································13九參考文獻···············································15十總電路圖……………………………………………………161引言19直流電動機由于有著廣泛的起制動性能，宜于在廣泛范圍內(nèi)平滑調(diào)速，且直流拖動系統(tǒng)在理論上和實踐上都比較成熟，因而目前應(yīng)用廣泛。直流電機在一定范圍內(nèi)無極平滑調(diào)速系統(tǒng)來說，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)
7、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：（1）電流一定連續(xù)；（2）可使電機在四象限運行；（3）電機停止時有微振電流，能消除靜摩擦死區(qū)；（4）低速平穩(wěn)性好，系統(tǒng)的調(diào)速范圍可達1:20000左右；（5）低速時，每個開關(guān)器件的驅(qū)動脈沖仍較寬，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：在工作過程中
8、，4個開關(guān)器件可能都處于開關(guān)狀態(tài)，開關(guān)損耗大，而且在切換時可能發(fā)生
