中频感应加热设备的设计.docx

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DesignofInductionheatingpowerofmediumfrequencyAbstractInductionheatingpowerisequippedwithlotsofadvantagessuchashighheatingefficiencyfastspeedgoodcontrollabilitywhichispronetomakeheatingofhighandpartialtemperatureandrealizemechanizationandautomation.Atpresentmetalmeltingworkpieceheatpenetrationquenchingweldingcastingelbowpiecesurfaceheatingprocessinghasbeenwidelyapplied.Inductionheatingofmediumfrequencyanddevelopmentcurrentsituationandtendencyrelatedtechnologyhasbeenstudiedandhavemadequitecomprehensiveandintheprofoundelaborationfoundationthisarticlehascarriedonthedesigntomaincircuitandtheinversioncontrolofthe2.5kHz/250kWsilicon-controlledrectifierintermediatefrequencyinductionheatingpower.Thisdesignisusedforbigfacilityofmechanicalheatingprocessing.Structureofrectificationcircuitiseasywhichmakespowerpopularizedeasily.Three-phasebridgerectificationcircuitisusedinRectificationcircuit.Rectificationcircuitusesfeedbackcontroloftwoclosedloopimprovingthedisadvantages.Thefoundationforinventinginductionheatingpowerofbigpowerandsuperaudioismade.Keywords：ControllablesiliconmediumpowerInductionheatingInverterProtectcircuit目录1.绪论11.1感应加热电源的特点和应用11.2感应加热电源的发展阶段11.3感应加热电源发展的主要因素21.4感应加热电源的发展趋势22.感应加热电源32.1基本工作原理32.2基本结构43.整流电路设计53.1整流电路的分类53.2整流电路的选择53.3三相桥式全控整流电路63.4整流电路的参数设计84.控制电路设计94.1控制电路系统的概述94.2控制电路的结构与原理94.3控制电路的作用114.4控制策略114.52.5kHz/250kW感应加热电源控制电路结构144.6控制触发回路频率跟踪调节154.6.1触发要求154.6.2频率跟踪电路154.7过流和过压的保护电路165驱动电路的设计245.1绝缘栅双极型晶体管（IGBT）对驱动电路的要求245.1.1门极电压对开关