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1、智能数控开关电源设计摘要:开关电源是利用现代电子电力技术控制功率开关管(MOSFET,IGBT)的导通和关断的时间比来稳定输出电压的一种新型稳压电源。它是在电子、计算机、通信、电气、航空航天、军事以及家电等领域应用非常广泛的一种电力电子装置。具有电能转换效率高、体积小、重量轻、控制精度高和快速性好等优点。本次设计的主要目的是实现一个单片机控制开关电源,开关电源在日常生活中应用非常广泛,如今是数字化时代,用单片机实现电子产品十分方便,所以在这次设计中使用了单片机实现。在这次设计文档中,详细阐述了开关电源,方案论证,总体结构设计,通过键盘预置期望输出电压值,模/数转换器对输出电压
2、进行采样,由软件控制单片机输出相应的脉冲宽度,对开关电源进行脉宽调制,输出预期的电压。并采用PID算法控制输出电压稳定,构成可输出3v到12v的可调电压,并显示实时电压和预置值。关键字:开关电源,PID算法,闭环控制,数控IITheDesignofIntelligentNCSwitchingModePowerSupplyAbstract:Switchingmodepowersupplyisanewpowersupplywhichmakesuseofmodernpowerelectronicstechnologytocontroltherateofpowerswitch(MOS
3、FET,theIGBT)turn-onandturn-offtime.Itisapowerelectronicdevicewhichiswidelyusedinthefieldofelectronics,computer,communications,electrical,aerospace,militaryandhomeappliancesandsoon.Ithastheadvantagesofhighpowerconversionefficiency,smallsize,lightweight,highcontrolaccuracyandfast.Themainaimof
4、thedesignistorealizeSwitchingModePowerSupplycontroledbyaMicroprocessorControlUnit.SwitchingModePowerSupplyarewidelyappliedtodailylife.Indigitaltimes,itisveryconvenienttoproduceelectronicproductswhichusesMicroprocessorControlUnit,sointhisdesign,youwillseeMicroprocessorControlUnit.Inthisdesig
5、ndocuments,thispaperdescribindetailtheSwitchingModePowerSupply,theciteofthescheme,thedesignofgeneralstructure.Setexpectedoutputvoltagevaluesatfirstthroughthekeyboard,thesamplingofoutputvoltagevaluesbyd/aconverter,theMicroprocessorControlUnitcontroledbysoftwareoutputcorrespondingpulsewidth,s
6、witchpulsewidthinSwitchingmodepowersupply,outputthevoltagevalueswhichexpected.Stabilizetheoutput3vto12vadjustablevoltage,whichstabilizetheoutputvoltagevaluescontroledbyPIDanddisplayreal-timevoltageandthepresetvalue.Keyword:SMPS,PIDalgorithm,closed-loopcontrol,CNCII目录摘要......................
7、.....................................................................................................................ⅠAbstract................................................................................................................................