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感应加热电源控制电路结构.174.6控制触发回路频率跟踪调节.184.6.1触发要求.184.6.2频率跟踪电路.184.7过流和过压的保护电路.195.结论.20致谢.21参考文献.22