高频开关电源的设计

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1、摘要通信电源是电信网的能源，其供电质量的好坏直接关系到整个电信网的畅通，本课题首先分析了近年来国内外高频通信开关电源的发展状况，在理论分析和电路实验的基础上，开发出了一种新型的高频通信开关电源（交流配电模块、直流配电模块、4只高频开关整流模块和监控模块置于同一机架内），该电源优化了电路的主要参数，设计了相移脉宽调制零电压开关谐振（PS-ZVSPWM）全桥变换器电路和以集成控制器UC3875芯片为核心的控制电路，实现了功率开关管的零电压开通和近似零电压关断，研制出高效率（达93%）、高稳定度(±0.5

2、%）、高可靠性、低电磁干扰的高频开关整流模块。同时文中还提到了以MCS-51单片机电路为核心的的电源监控模块与监控设计思路。保证了整机能够安全可靠工作。关键词：高频开关电源；相移脉宽调制；零电压开关ABSTRACTThecorrespondencepowerswitchisthetelecommunicationnetworkenergy,itspowersupplyqualityqualityrelatesdirectlytotheentiretelecommunicationnetworkuni

3、mpededness,thistopichasfirstanalyzedtherecentyearsdomesticandforeigncommunicationsswitchingpowersupplydevelopmentcondition,testsinthetheoreticalanalysisandtheelectriccircuitinthefoundation,developedonekindofnewcommunicationswitchingpowersupply(alternat

4、ing-currentdistributionmodule,directcurrentpowerdistributionmodule,4highfrequencyswitchesrectificationmoduleandmonitoringmoduleputsinidenticalrack),thispowersourceoptimizedtheelectriccircuitmainparameter,hasdesignedthephase-shiftpulse-durationmodulatio

5、nzeropotentialswitchresonance(PS-ZVSPWM)theentirebridgeconverterelectriccircuitandtakeintegratesthecontrollerUC3875chipasthecorecontrolcircuit,Realizedthepowerswitchingvalvezeropotentialtoclearwiththeapproximatezeropotentialshutsoff,developsthehigheffi

6、ciency(toreach93%),thehighstability(±0.5%),redundantreliable,thelowelectronmageticinterferencehighfrequencyswitchrectificationmodule.AtthesametimeinthearticlealsoproposedbasedonMCS-51isthecorepowersourcemonitoringmoduleandmonitoringdesignmentality.Hasg

7、uaranteedentiremachinesafereliablework.Keywords:Highfrequencyswitchingpower;Phase-ShiftingPWMZVS；ZeroVoltageSwitching目录1绪论········································································································11.1开关电源的发展及国外现状··········

8、···············································11.2国内通信电源的发展及现状····················································41.3研究内容····················································································52电路原理方案分析和选择················