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1、摘要开关电源具有效率高、体积小、重量轻等显著特点。目前世界各国都有广泛的应用，特别是对大容量高频开关电源的研究和开发已成为当今电力电子学的主要研究领域，并派生了很多新的研究方向。本设计的题目为10kW直流开关电源的设计，直流开关电源的工作原理：电网输送来的交流电经整流滤波电路变为直流，经过高频逆变电路变为高频交流，通过高频变压器将高频交流电变压，然后高频交流电经单相桥式整流滤波电路变为直流。根据直流开关电源的工作原理确定设计方案，选择三相桥式不控整流滤波电路作为主电路的输入级电路，通过分析比较各种变化器的优缺点，选用移相式全桥变换器，设
2、计了高频变压器，选择单相桥式整流电路作为主电路的输出级电路，在电压调节环节上，详细分析了基于UC3825控制芯片的PWM控制电路。并根据任务要求完成了IGBT驱动电路、系统反馈电路的、保护电路、辅助电源以及均流电路的设计。本次设计的10kW直流开关电源具有输出电压可调、输出电流大、纹波小等特点。实验结果表明它基本达到设计要求，从而验证了理论分析的正确性，具有广阔的应用前景。关键词：变换器；开关电源；高频变压器；PWM控制AbstractSwitchingpowersupplywithhighefficiency,smallsize,li
3、ghtweightandothersignificantcharacteristics.Atpresent,allthecountriesintheworldhaveawiderangeofapplications,especiallyintheresearchanddevelopmentoflargecapacityandhighfrequencyswitchingpowersupplyhasbecomeamainresearchfieldofmodernpowerelectronics,andderivealotofnewresea
4、rchdirections.Thesubjectofthisdesignisthedesignof10kWDCswitchingpowersupply,theworkingprincipleofDCswitchingpowersupply:thegridtotheACrectifiedfiltercircuitintoaDC,afterhighfrequencyinvertercircuitintoahigh-frequencyalternatingcurrent,highfrequencyalternatingcurrenttrans
5、formerbyhigh-frequencytransformerwill,thenhighfrequencyACsingle-phasebridgerectifierfiltercircuitfordc.AccordingtothedesignschemetodeterminetheworkingprincipleofDCswitchingpowersupply,selectionofthree-phaseuncontrolledrectifierfiltercircuitastheinputcircuitofmaincircuit,
6、comparingtheadvantagesanddisadvantagesofvariouschangesthroughtheanalysis,selectionofphase-shiftfullbridgeconverter,highfrequencytransformerdesign,selectionofsinglephasebridgerectifiercircuitasoutputcircuitofthemaincircuit,onthevoltageregulationpart,adetailedanalysisofthe
7、UC3825controlchipcontrolcircuitbasedonPWM.AndtheIGBTdrivecircuit,feedbackcircuit,protectioncircuit,auxiliarypowersupplyandaflowequalizationcircuitisdesignedaccordingtotherequirementofthetask.Thedesignof10kWDCswitchingpowersupplyhasthecharacteristicsofadjustableoutputvolt
8、age,outputcurrent,lowripple.Theexperimentalresultsshowthatitmeetsthedesignrequirement,whichverifiesthec
