【正文】 本科畢業(yè)設(shè) 計(jì)（ 論 文） 題 目 雙閉環(huán)控制的異步電動 機(jī)串級調(diào)速系統(tǒng)的設(shè)計(jì) 學(xué)生姓名 學(xué) 號 教學(xué)院系 電氣信息學(xué)院 專業(yè)年級 電氣工程及其自動化 09 級 指導(dǎo)教師 職 稱 單 位 西南石油大學(xué) 輔導(dǎo)教師 職 稱 單 位 完成日期 2020 年 6 月 9 日 Southwest Petroleum University Graduation Thesis The Design of Double Closed Loop Control of Asynchronous Motor Cascade Speed Regulation System School of Electrical Engineering and Information 20206 Grade: 2020 Name: Speciality: Electrical Engineering and Automation Instructor: I 摘要 繞線式異步電動機(jī)的串級調(diào)速系統(tǒng)，屬于改變轉(zhuǎn)差功率的調(diào)速系統(tǒng)，在我國交流調(diào)速技術(shù)的發(fā)展中，它是結(jié)構(gòu)簡單、發(fā)展較快、應(yīng)用較廣的一種系統(tǒng)。其基本原理是利用不可控的整流電路將轉(zhuǎn)子交流電動勢轉(zhuǎn)成直流電動勢，在利用工作的在逆變狀態(tài)的三相可控整流電路來獲得一個(gè)可調(diào)的直流電壓作為附加電動勢，以改變轉(zhuǎn)差功率，以實(shí)現(xiàn)轉(zhuǎn)速的調(diào)節(jié)。串級調(diào)速完全克服了轉(zhuǎn)子串電阻調(diào)速的缺點(diǎn)，它具有高效率、無級平滑調(diào)速、較硬的低速機(jī)械特性等優(yōu)點(diǎn)。 本設(shè)計(jì)介紹了雙閉環(huán)異步電動機(jī)串級調(diào)速方式的設(shè)計(jì)，主要設(shè)計(jì)方面包括調(diào)速方式的設(shè)計(jì)，主接線的設(shè) 計(jì)，串級調(diào)速主電路的設(shè)計(jì)，保護(hù)電路的設(shè)計(jì)，觸發(fā)器的選擇，直接啟動方式。首先根據(jù)設(shè)計(jì)要求確定調(diào)速方案和主電路的結(jié)構(gòu)型式，主電路和閉環(huán)系統(tǒng)確定下來后，重在對電路各元件參數(shù)的計(jì)算和器件的選型，包括整流變壓器、整流元件、平波電抗器、保護(hù)電路以及電流和轉(zhuǎn)速調(diào)節(jié)器的參數(shù)計(jì)算，從而達(dá)到設(shè)計(jì)要求，其中有繪制完整的雙閉環(huán)控制的異步電動機(jī)串級調(diào)速系統(tǒng)圖，主接線圖，控制電路圖，最后采用了 MATLAB 建模與仿真證明了該系統(tǒng)。 關(guān)鍵字 ： 串級調(diào)速；主電路；調(diào)速范圍；轉(zhuǎn)差率 II Abstract The wound rotor asynchronous motor cascade speed regulation system, is to use change slip power control speed regulation system. In the development of ac speed regulation technology in China. It is a system of simple structure, rapid development, wider application. Its basic principle is to put the rotor AC electromotive force into DC emfs by Uncontrolled rectifier circuit. Taking advantage of working in a state of threephase inverter controlled rectifier circuit for an adjustable DC voltage as additional electromotive force, to change the slip power, in order to realize speed regulation. Cascade speed regulation pletely overes the drawback of rotor series resistance speed control, it has high efficiency, stepless smooth speed regulation, a hard low mechanical properties etc. the design of the double closed loop of asynchronous motor cascade speed control mode， It mainly includes the design of speed control mode, main wiring ,the main circuit, protective circuit , the choice of the trigger and direct startup mode。 First of all, according to the design requirements to determine the structure of control scheme and the main circuit. In the determination of the main circuit and the closed loop system. Focus is on the circuit element parameters calculation and device type selection. Including rectifier transformer, rectifier devices, flat wave reactor, protection circuit and the current and speed regulator parameter calculation, so as to achieve the design requirements. Mapped the plete double closed loop control of asynchronous motor cascade speed regulation system, the main wiring diagram, control circuit diagram, the modeling and Simulation of MATLAB proved that the system meets the design requirements and plete and has good disturbance rejection properties and tracking performance, small overshoot. Keywords: the main circuit； cascade control； Speed range； slip ratio. III 目錄 摘要 ................................................................................................................................. I Abstract ..........................................................................................................................II 1 緒論 ............................................................................................................................. 1 串級調(diào)速系統(tǒng)的發(fā)展?fàn)顩r ............................................................................. 1 本次設(shè)計(jì)的目的 ............................................................................................. 1 2 本系統(tǒng)串級調(diào)速方案的比較和選擇 ......................................................................... 3 串級調(diào)速原理 .................................................................................................. 3 串級調(diào)速方案論證 .......................................................................................... 4 電氣串級調(diào)速 ....................................................................................... 4 機(jī)械串級調(diào)速 ....................................................................................... 4 串級調(diào)速方案選擇 ............................................................................... 5 3 本系統(tǒng)主電路的設(shè)計(jì) ................................................................................................. 6 本系統(tǒng)主電路的組成及工作原理 .................................................................. 6 本系統(tǒng)主電路元器件參數(shù)計(jì)算及型號選擇 .................................................. 6 異步電動機(jī)的選擇 ............................................................................... 6 逆變變壓器的參數(shù)計(jì)算與選擇 ........................................................... 9 硅整流元件及晶閘管的選擇 ............................................................. 10 平波電抗器電感量的計(jì)算與選擇 ..................................................... 11 晶閘管保護(hù)裝置的參數(shù)計(jì)算 ........................................................................ 12 過電壓保護(hù) ......................................................................................... 12 過電流保護(hù) ......................................................................................... 16 電流上升率的限制 ............................................................................. 17 電壓上升率的限制 ............................................................................. 18 逆變觸發(fā)器的設(shè)計(jì) ........................................................................................ 18 KJ004 和 KJ041 的引腳圖 ................................................................. 18 同步變壓器的設(shè)計(jì) ............................................................................ 19 控制及偏移電源 ................................................................................ 20 三相橋式逆變電路的觸發(fā)電路 ......................................................... 20 電動機(jī)的保護(hù) ..........................................................................