感应加热用晶闸管中频电源-毕业论文.doc

摘 要感应加热电源具有加热效率高，速度快，可控性好，易于实现高温和局部加热，易于实现机械化和自动化等优点，目前已在金属熔炼、工件透热、淬火、焊接、铸造、弯管、 表面热处理等行业得到了广泛的应用。本设计研究了中频感应加热及其相关技术的发展、现状和趋势，并在较全面的论述基础上，对可控硅中频感应加热电源的整流电路以及控制电路进行了设计。 本文设计的电源电路可用于大型机械热加工设备的感应加热电源。整流电路采用三相桥式 全控整流电路，其电路结构简单，使电源易于推广。 本设计主要是分析由半导体二极管、晶闸管、大功率晶体管等元件组成的三相桥式可控整流电路、单相桥式并联逆变电路、保护电路以及继电器接触器控制电路等的工作原理和参数计算，并对整流触发电路和晶闸管中频电源等原理作专门的分析关键词：可控硅中频电源，感应加热，逆变，保护电路BSTRACT Induction heating power is equipped with lots of advantages such as high heating efficiency, fast speed, good controllability, which is prone to make heating of high and partial temperature ， and realize mechanization and automation. At present metal melting, work piece heat penetration, quenching, welding, casting, elbow piece, surface heating processing has been widely applied. Induction heating of medium frequency and development, current situation, and tendency related technology has been studied，and have made quite comprehensive and in the profound elaboration foundation, this article has carried on the design to main circuit and the inversion control of the silicon-controlled rectifier intermediate frequency induction heating power. This design is used for big facility of mechanical heating processing. Structure of rectification circuit is easy, which makes power popularized easily. Three-phase bridge rectification circuit is used in Rectification circuit. The analysis is designed mainly by the semiconductor diode, thyristor. High-power transistors and other circuit elements, the three-phase controlled rectifier bridge, parallel single-phase inverter bridge circuit. relay contactor control and protection circuit for the working principle and circuit parameters. IF triggered thyristor power rectifier circuit and also other principles for specialized analysis. KEY WORDS:Controllable silicon medium power,Induction heating,Inverter,Protect circuit. 目 录 第1章 绪论………………………………………………………………………..1 1.1 课题的研究背景………………………………………………………….1 1.2 课题研究的现状及意义………………………………………………….1 1.3 论文结构………………………………………………………………..4 第