邏輯無環(huán)流可逆直流調(diào)速系統(tǒng)設計

畢業(yè)設計 設計大圖 設計正文 開題報告

摘要

直流電動機具有良好的起制動性能，易于在廣泛范圍內(nèi)平滑調(diào)速，在需要高性能可控電力拖動的領域中得到了廣泛的應用。直流拖動控制系統(tǒng)在理論上和實踐上都比較成熟，它是交流拖動控制系統(tǒng)的基礎，所以首先應該掌握直流系統(tǒng)。
從生產(chǎn)機械要求控制的物理量來看，電力拖動自動控制系統(tǒng)有調(diào)速系統(tǒng)，位置隨動系統(tǒng)，張力控制系統(tǒng)，電動機同步控制系統(tǒng)等多種類型，而各種系統(tǒng)往往都是通過控制轉(zhuǎn)速來實現(xiàn)的，因而調(diào)速系統(tǒng)是最基本的拖動控制系統(tǒng)。在許多生產(chǎn)機械中，常要求電動機既能正反轉(zhuǎn)，又能快速制動，需要四象限運行的特性，此時必須采用可逆調(diào)速系統(tǒng)。
本文介紹了邏輯無環(huán)流可逆直流調(diào)速系統(tǒng)的基本原理及其構(gòu)成，并對其控制電路進行了計算和設計。經(jīng)過設計研究發(fā)現(xiàn)，和有環(huán)流系統(tǒng)相比，邏輯無環(huán)流可逆直流調(diào)速系統(tǒng)省去了環(huán)流電抗器，沒有了附加的環(huán)流損耗，節(jié)省變壓器和晶閘管裝置的附加設備容量，因換流失敗造成的事故率大為降低。
關鍵詞：邏輯無環(huán)流；可逆調(diào)速；直流電機

Abstract

 The direct current electric motor has the good braking quality, easy in widespread scope smooth velocity modulation, in needed in the domain which the high performance controllable electric power drove to obtain the widespread application. Direct current drives the control system in theoretically quite to be all mature with the practice in, moreover looked from the feedback closed-loop control angle, it also is the exchange drives the control system the foundation, therefore first should grasp the direct current system.
    Looked from the production machinery request control physical quantity, the electric power drives the automatic control system to have the velocity modulation system, the position servo system, the tensity control system, multi- electric motors synchronization control system and so on many kinds of types, but each kind of system often all is, thus the velocity modulation system which realizes through the control rotational speed is most basic drives the control system. In many produces in the machinery, often requests the electric motor both to be able to reverse, and can fast apply the brake, to need four quadrants movements the characteristic, this time must use the reversible velocity modulation system.
This paper introduces the basic theory and structure of the Logic Non-loop-current DC SR System and the calculation and design of it’s control circuit。After the design was found, and circulation systems, the logic of free circulation reversible DC drive system eliminating the circulation reactor, there is no additional wear and tear of circulation, transformers and thyristor device to save the additional equipment capacity, due to the failure of converter resulted in greatly reduced the accident rate.
Keywords：logic non-loop-current；reversible speed control；DC motor