毕业设计-矿井升机串级调速系统设计.doc

毕业设计（论文） 矿井提升机串级调速系统设计 摘 要 串级调速是交流异步电动机调速的一种类型,串级调速的思想就是将异步电动机的转子电压经过三相桥式整流变为直流电压，再在其直流侧由可控硅逆变电路产生与其相反的直流电势与三相桥式产生的直流电压串联，改变逆变角的大小来改变直流电势的大小，达到调速的目的，同时还能提高电动机的运行效率和调速的经济性。 本文依据矿井提升机对电力拖动系统的要求，采用可控硅串级调速来控制其拖动电动机实现无级调速，满足矿井提升机对电力拖动系统调速性能和节能的要求。本文主要研究三相交流绕线式异步电动机可控硅串级调速系统的主、辅电路设计有关的技术问题。包括系统的组成与工作原理，主回路的设计，控制回路设计，系统的静、动态工作特性计算分析等。 关键词： 可控硅, 串级调速, 整流, 逆变 ABSTRACT The speed of adjusting of each is to exchange a kind of adjusting the speed of asynchronous motor, Each transfer the thoughts of speed to turn into direct current pigeonhole through three-phase bridge type rectification asynchronous the rotor voltages of motors, And then in its direct current it inclines to be at silicon controlled rectifier against becoming circuit produce at opposite direct current tendency and three-phase bridge direct current who type produce pigeonholes and contacts, Change, The ones that still can improve the operational efficiency of the motor and adjust speed at the same time are economic. This text basis mine lifting machine pull systematic request to electricity, adopt silicon controlled rectifier each is it is it control it pull motor realize the stepless speed regulation to come rapidly to adjust, meet mine lifting machine pull to electricity system transfer speed performance and energy-conserving request. This text main research three phases exchange person who wind the line asynchronous motor silicon controlled rectifier each transfer speed systematic main fact, complement circuit design relevant technological questions. Including systematic composition and operation principle , main design of return circuit, control design of way of answering, quiet, dynamic performance characteristics computational analysis of the system, etc. The keywords: Silicon controlled rectifier, each adjusts speed, rectification, Go against and change 目 录 1. 概述 1 1.1 交流电动机调速的发展概况 1 1.2 矿井提升机对电力拖动系统的要求 3 1.3 本课题研究的目的和内容 4 2. 提升机调速系统方