中频感应加热电源的设计毕业论文.doc

本科毕业论文（设计）中频感应加热电源的设计（整流电路控制电路的设计）学生姓名：所在院（系）：机电学院所学专业：机械设计制造及其自动化导师姓名：完成时间：1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2.5kHz/250kW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；控制策略选用双闭环反馈控制系统，改善了信号迟滞的缺点，为以后研制大功率、超音频的感应加热电源打下了基础。关键词：可控硅中频电源；感应加热；逆变；保护电路2DesignofInductionheatingpowerofmediumfrequencyAbstractInductionheatingpowerisequippedwithlotsofadvantagessuchashighheatingefficiency,fastspeed,goodcontrollability,whichispronetomakeheatingofhighandpartialtemperature，andrealizemechanizationandautomation.Atpresentmetalmelting,workpieceheatpenetration,quenching,welding,casting,elbowpiece,surfaceheatingprocessinghasbeenwidelyapplied.Inductionheatingofmediumfrequencyanddevelopment,currentsituation,andtendencyrelatedtechnologyhasbeenstudied，andhavemadequitecomprehensiveandintheprofoundelaborationfoundation,thisarticlehascarriedonthedesigntomaincircuitandtheinversioncontrolofthe2.5kHz/250kWsilicon-controlledrectifierintermediatefrequencyinductionheatingpower.Thisdesignisusedforbigfacilityofmechanicalheatingprocessing.Structureofrectificationcircuitiseasy,whichmakespowerpopularizedeasily.Three-phasebridgerectificationcircuitisusedinRectificationcircuit.Rectificationcircuitusesfeedbackcontroloftwoclosedloop,improvingthedisadvantages.Thefoundationforinventinginductionheatingpowerofbigpowerandsuperaudioismade.Keywords：ControllablesiliconmediumpowerInductionheatingInverterProtectcircuit3目录1.绪论.41.1感应加热电源的特点和应用.41.2感应加热电源的发展阶段.41.3感应加热电源发展的主要因素.51.4感应加热电源的发展趋势.52.感应加热电源.62.1基本工作原理.62.2基本结构.73.整流电路设计.83.1整流电路的分类.83.2整流电路的选择.83.3三相桥式全控整流电路.93.4整流电路的参数设计.114.控制电路设计.124.1控制电路系统的概述.124.2控制电路的结构与原理.124.3控制电路的作用.144.4控制策略.144.52.5kHz/250kW感