三相桥全控整流..docVIP

课程设计报告 题 目 三相桥式全控整流电路的设计（纯电阻负载,交通运输,空间技术,国防现代化,医疗,环保,和亿万人们日常生活的各个领域,进入21世纪后电力电子技术的应用更加广泛,因此对电力电子技术的研究更为重要。近几年越来越多电力电子应用在国民工业中,一些技术先进的国家,经过电力电子技术处理的电能已得到总电能的一半以上。把交流电能转换为直流电能的电路。大多数整流电路由变压器、整流主电路和滤波器等组成。它在直流电动机的调速、发电机的励磁调节、电解、电镀等领域得到广泛应用。整流电路通常由主电路、滤波器和变压器组成。20世纪70年代以后，主电路多用硅整流二极管和晶闸管组成。滤波器接在主电路与负载之间，用于滤除脉动直流电压中的交流成分。变压器设置与否视具体情况而定。变压器的作用是实现交流输入电压与直流输出电压间的匹配以及交流电网与整流电路之间的电隔离。本文主要介绍三相桥式全控整流电路的主电路和触发电路的原理及控制电路图,由工频三相电压380V经升压变压器后由SCR(可控硅)再整流为直流供负载用Abstract The?application?of?electronic?technology?has?penetrated?into?the?industrial?and?agricultural?economic?construction,?transportation,?space?technology,?the?modernization?of?national?defense,?medical,?environmental?protection,?and?hundreds?of?millions?of?people?in?all?areas?of?daily?life,?enter?after?twenty-first?Century?power?electronic?technology?is?used?more?and?more?widely,?so?the?power?electronic?technology?is?more?important.?In?recent?years?more?and?more?application?in?the?national?power?electronics?industry,?some?advanced?technologies?of?the?country,?after?the?processing?of?electric?power?electronic?technology?has?been?more?than?half?the?total?energy. Rectifier circuit can convert ac power to dc circuit. Most of the rectifier circuit by transformer, rectifier circuit and filter, etc. It in the dc motor speed, generator excitation control, electrolysis, electroplating, and other fields is widely used. Rectifier circuit is usually consists of main circuit, filter and transformer. Since the 1970 s, the main circuit is multi-purpose silicon rectifier diode and brake tubes. Filter between the main circuit and the load, used to filter out the communication component of pulsating dc voltage. Transformer set or not depending on the specific situation. The role of the transformer is to realize the communication between the input voltage and dc output voltage matching, and ac power grid and electrical isolation between the rectifier circuit.? This?paper?mainly?introduced?the?three-phase?full-bridge?contr