常州工学院毕业设计论文PAGE\*MERGEFORMATI摘要本文主要研究了交错并联式双管正激变换器及其控制电路。相比于其他隔离式DC/DC变换器，交错并联结构的双管正激变换器有自动实现励磁能量的回馈，结构简洁等优点。同时，其主功率管只需承受电源电压，从而选择面更广。此外，其并联结构缩小了输出滤波电感的体积，降低了器件的应力，从而进一步减小了损耗。在控制电路的设计方面，考虑到电源输出电压范围的可控性，本文采用电压反馈控制方式，选用UC3825型脉宽调制器。本文列举了DC/DC变换的各种拓扑，比较了四种PWM控制模式，分析了交错并联式双管正激变换器的工作原理及其工作过程，详细推导并建立了带有电压反馈控制的双管正激变换电路的小信号模型，设计了补偿网络，给出了主电路和控制电路的工程计算。最后，对系统进行频域、时域仿真，并给出相关分析。关键词：双管正激变换器、电压反馈控制、小信号模型、补偿网络、仿真常州工学院毕业设计论文PAGE\*MERGEFORMATIAbstractThispaperstudiestheparalleldualinterleavedforwardconverteranditscontrolcircuit.DifferenttootherisolatedDC/DCconverters,theparalleldualinterleavedforwardconvertercanfeedbackexcitationenergyautomatically,also,simplestructureistheoneofthesystem’sadvantages.Meanwhile,thepowerswitchesonlyneedtoworkjustunderthemainpowervoltage,whichmakesthedesignershaveawiderrangeofchoosingthepowerswitches.Inaddition,theparallelstructurereducesthevolumeoftheoutputfilterinductance,reducingthestressofthedevice,thereby,furtherreducingtheloss.Inthecontrolcircuitdesign,takingintoaccountofthecontrollabilityoftherangeoftheoutputvoltage,weusevoltagefeedbackcontrolmethod,andchosetheUC3825voltagepulsewidthmodulator.ThisarticleliststheDC/DCconversionofthevarioustopologies,makesacomparisonofthefourPWMcontrolmodes,analyzestheparalleldualinterleavedforwardconverter’soperatingprincipleandworkingprocess,derivesindetailandestablishthesmallsignalmodel,designsthecompensationnetwork,andcarriesoutthemaincircuit’sandcontrolcircuit’sengineeringcalculation.Finally,thispapermakesthesystemfrequencyandtimedomainsimulation,andmakesomecorrelationanalysis.Keywords:dualforwardconverter,voltagefeedbackcontrol,smallsignalmodel,compensationnetwork,simulation常州工学院毕业设计论文PAGE\*MERGEFORMATIII目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc294555224"摘要PAGEREF_Toc294555224\hIHYPERLINK\l"_Toc294555225"AbstractPAGEREF_Toc294555225\hIHYPERLINK\l"_Toc294555226"目录PAGEREF_Toc294555226\hIIHYPERLINK\l"_Toc294555227"第1章绪论PAGEREF_Toc294555227\h1HYPERLI