【正文】 B 軟件對系統(tǒng)性能進行了仿真。串級調(diào)速技術(shù)除可用于新設(shè)備設(shè)計外，還可用于對舊設(shè)備進行技術(shù)改造。摘 要本文介紹次同步轉(zhuǎn)速下串級調(diào)速系統(tǒng)，它是通過繞線式異步電動機的轉(zhuǎn)子回路引入附加電動勢而產(chǎn)生的，屬于轉(zhuǎn)差功率回饋型調(diào)速系統(tǒng)，具有結(jié)構(gòu)簡單、可靠、經(jīng)濟、維護方便等優(yōu)點，在工業(yè)生產(chǎn)中得到了越來越廣泛的應(yīng)用。串級調(diào)速是異步電動機十分經(jīng)典的調(diào)速方法之一，它可以實現(xiàn)無級平滑調(diào)速，是結(jié)構(gòu)簡單、發(fā)展較快、技術(shù)難度較小、性能比較完善的一種控制系統(tǒng)。因此，研究和應(yīng)用串級調(diào)速技術(shù)具有極大的技術(shù)和經(jīng)濟意義。關(guān)鍵詞：異步電動機；串級調(diào)速；轉(zhuǎn)差功率回饋型；MATLAB 仿真 AbstractIn this paper, cascade thyristor speed control introduces additional Emf through the rotor loop of the woundinduction motor, which belongs to slip power feedback system and is simple in structure, reliable, economic and easily maintained, and has won increasingly broad applications in industrial production. Cascade speed control is one of the very classic speed control method in asynchronous motor, which can realize stepless smoothing speed. It is a simple and rapid control system with low level of difficulty in techniques and rather perfect performance. Thyristor cascade speed control technology can be used in technical transformation for old equipment in addition to the design of new equipment. Therefore, study and application of thyristor cascade speed control technology are of great technical and economic significance. In this paper, the working principle and the basic performance of cascade speed control system in induction motor are studied emphatically. The dynamic parameters of cascade speed control system using both speed loop and current loop are designed under the condition of known static and dynamic performance requirements. The working process of cascade speed control system with doubleclosedloop is discussed and the simulation for the system performance are made with MATLAB software.Keywords: Asynchronous motor；Cascade Speed Control；Slip power feedback；MATLAB simulation目 錄1 緒論 ....................................................................................................................................1 交流調(diào)速系統(tǒng)的發(fā)展 .............................................................................................1 交流調(diào)速技術(shù)現(xiàn)狀 .................................................................................................1 課題研究意義 .........................................................................................................2 課題分析與研究計劃 .............................................................................................3 社會經(jīng)濟效益分析 .................................................................................................32 串級調(diào)速的基本原理 ........................................................................................................5 交流調(diào)速方式 .........................................................................................................5 異步電動機串級調(diào)速原理 .....................................................................................6 串級調(diào)速的各種基本運行狀態(tài)及功率傳遞關(guān)系 .................................................8 串級調(diào)速系統(tǒng)的基本類型 ...................................................................................10 串級調(diào)速系統(tǒng)方案的確定 ...................................................................................113 串級調(diào)速系統(tǒng)的調(diào)速特性和機械特性 ..........................................................................13 串級調(diào)速系統(tǒng)轉(zhuǎn)子整流電路的工作狀態(tài) ...........................................................13 串級調(diào)速系統(tǒng)的調(diào)速特性 ...................................................................................14 次同步串級調(diào)速系統(tǒng)的機械特性 .......................................................................15 異步電動機在自然接線方式下的最大轉(zhuǎn)矩 ............................................16 串級調(diào)速異步電動機工作在第一工作區(qū)內(nèi)的機械特性 ........................16 串級調(diào)速異步電動機工作在第二工作區(qū)內(nèi)的機械特性 ........................184 控制環(huán)節(jié)單元電路研究 ..................................................................................................20 反饋檢測裝置 .......................................................................................................20 電流檢測裝置 ............................................................................................20 轉(zhuǎn)速檢測環(huán)節(jié) ............................................................................................20 電流、速度調(diào)節(jié)器結(jié)構(gòu)選擇 ...............................................................................21 電流調(diào)節(jié)器 ACR 的結(jié)構(gòu) ..........................................................................21 速度調(diào)節(jié)器 ASR 的結(jié)構(gòu) ..........................................................................21 給定積分器 ...........................................................................................................225 次同步串級調(diào)速系統(tǒng)的工程設(shè)計研究 ..........................................................................23 系統(tǒng)電路及原理圖設(shè)計 .......................................................................................23 實驗調(diào)試及數(shù)據(jù)分析 ...........................................................................................24 直流測速發(fā)電機的工作特性 ....................................................................24 串級調(diào)速系統(tǒng)開環(huán)工作機械特性 ............................................................26 串級調(diào)速系統(tǒng)單閉環(huán)工作機械特性 ........................................................27 串級調(diào)速系統(tǒng)雙閉環(huán)工作機械特性 ........................................................30 串級調(diào)速系統(tǒng)的 MATLAB 仿真研究 ................................................................33 用 MATLAB 建立雙閉環(huán)串級調(diào)速系統(tǒng)的仿真模型 .............................33 系統(tǒng)仿真波形及其分析 ............................................................................35結(jié) 論 ................................................................................................................................39參考文獻 ..............................................................................................................................40致 謝 ................................................................................................................................41附錄 MATLAB 簡介 ..........................................................................................................42 1 緒論 交流調(diào)速系統(tǒng)的發(fā)展直流電氣傳動和交流電氣傳動在 19 世紀先后誕生。然而由于直流電動機本身結(jié)構(gòu)帶有電刷和換向器，成為限制自身發(fā)展的主要缺陷，導(dǎo)致其生產(chǎn)成本高、制造工藝復(fù)雜、運行維護工作量大，不能在粉塵、爆炸危險等惡劣環(huán)境下使用。近年來