资源描述：
《24v开关电源设计》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、临沂大学2013届本科毕业设计说明书摘要随着开关电源在计算机、通信、航空航天、仪器仪表及家用电器等方面的广泛应用,人们对其需求量日益增长,并且对电源的效率、体积、重量及可靠性等方面提出了更高的要求。开关电源以其效率高、体积小、重量轻等优势在很多方面逐步取代了效率低、又笨又重的线性电源。电力电子技术的发展，特别是大功率器件IGBT和MOSFET的迅速发展，将开关电源的工作频率提高到相当高的水平，使其具有高稳定性和高性价比等特性。开关电源技术的主要用途之一是为信息产业服务，信息技术的发展对电源技术又提出了更高的要求，从而促进了开关电源技
2、术的发展。本次设计采用典型的正激式开关电源结构设计形式，以(RCC)作为控制核心器件，运用脉宽调制的基本原理，并采用辅助电源供电方式为其供电，有利于增大主电源的输出功率。采用场效应管作为开关器件，其导通和截止速度很快，导通损耗小，这就为开关电源的高效性提供保障。同时，电路中辅以过压过流保护电路，为系统的安全工作提供保障，本电路注意改善负载调整率,降低了电磁串扰，达到绿色环保的目的。输出电压可调，使其可适用于不同场合。关键词高频变压器；场效应管；正激式变换器；脉宽调制第28页临沂大学2013届本科毕业设计说明书AbstractWith
3、thewideapplicationofswitchingpowersupplyinthecomputer,communications,aerospace,instrumentationandelectricalappliancesandsoon,thegrowingdemandforitspeople,andhasputforwardhigherrequirementsforpowerefficiency,volume,weightandreliability.Switchingpowersupplywithitshigheff
4、iciency,smallsize,lightweightandotheradvantagesinmanyrespectsgraduallyreplacedthelinearpowersupply,lowefficiency,heavyandbulky.Thedevelopmentofpowerelectronictechnology,especiallytherapiddevelopmentofthehigh-powerIGBTdevicesandMOSFET,increasingtheworkingfrequencyofthes
5、witchingpowersupplytoaveryhighlevel,whichhashighstabilityandhighperformancecharacteristics.Oneofthemainpurposesofswitchingpowersupplytechnologyisservesfortheinformationindustries,thedevelopmentofinformationtechnologyonpowertechnologyandputforwardhigherrequirements,soas
6、topromotethedevelopmentofswitchpowersupply.Thisdesignisexcitedbytheswitchingpowersupplydesignofthestructureoftypical,with(RCC)asthecorecontroldevice,usingthebasicprincipleofpulsewidthmodulation,andauxiliarypowersupplybywayofitspower,isconducivetotheoutputpowerincreaseo
7、fthemainpowersupply.FETusedasaswitchingdevice,theconductingandclosingfast,conductionlossissmall,whichguaranteethehighefficiencyswitchingpowersupply.Atthesametime,thecircuitwithover-voltageandover-currentprotectioncircuit,providingsecurityforthesafeoperationofsystem,the
8、attentionofthecircuittoimproveloadregulation,reducingtheelectromagneticcrosstalk,toachievethepurposeofenvironmentalpr
