【正文】 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。其基本原理是利用不可控的整流電路將轉(zhuǎn)子交流電動(dòng)勢(shì)轉(zhuǎn)成直流電動(dòng)勢(shì)，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(dòng)勢(shì)，以改變轉(zhuǎn)差功率，以實(shí)現(xiàn)轉(zhuǎn)速的調(diào)節(jié)。串級(jí)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(jí)平滑調(diào)速、較硬的低速機(jī)械特性等優(yōu)點(diǎn)。 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(jí)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(jí)調(diào)速方案的比較和選擇 ......................................................................... 3 串級(jí)調(diào)速原理 .................................................................................................. 3 串級(jí)調(diào)速方案論證 .......................................................................................... 4 電氣串級(jí)調(diào)速 ....................................................................................... 4 機(jī)械串級(jí)調(diào)速 ....................................................................................... 4 串級(jí)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(hào)選擇 .................................................. 6 異步電動(dòng)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(dòng)機(jī)的保護(hù) ................................................................................................ 21 IV 短路保護(hù) ............................................................................................. 21 過載保護(hù) ............................................................................................. 21 瞬時(shí)停電保護(hù) ..................................................................................... 22 4 本系統(tǒng)控制回路的設(shè)計(jì) ........................................................................................... 23 雙閉環(huán)串級(jí)調(diào)速系統(tǒng)的組成 和工作原理 .................................................... 23 雙閉環(huán)系統(tǒng)靜態(tài)參數(shù)計(jì)算 ............................................................................ 24 雙閉環(huán)系統(tǒng)動(dòng)態(tài)參數(shù)計(jì)算 ............................................................................ 25 電流調(diào)節(jié)器的參數(shù)計(jì)算 ..................................................................... 25 速度調(diào)節(jié)器的參數(shù)計(jì)算 ..................................................................... 26 5 本系統(tǒng)起動(dòng)方式的設(shè)計(jì) ........................................................................................... 28 串級(jí)調(diào)速系統(tǒng)起動(dòng)方式的確定 .................................................................... 28 本系統(tǒng)起動(dòng)方式的選擇 ................................................................................ 29 6 系統(tǒng)仿真 ................................................................................................................... 31 仿真軟件的簡(jiǎn)介 ............................................................................................ 31 具體的軟件仿真設(shè)計(jì) .................................................................................... 31 主電路的仿真設(shè)計(jì) ............................................................................ 31 控制電路的建模和參數(shù)設(shè)置 ............................................................ 33