开关电源
74
吉首大学学报(自然科学版)第31卷
3
实验结果及分析
功率因数校正电路输入电压和输入电流波形如图4所
示,图中U。:80V/格;,.:1A/格,且上面为L,.曲线,下面为
Ji曲线.由图4可知,输入交流电流与输入交流电压相位基本相同,输入电流波形为正弦波,实现了系统的高功率因数.电压上由于功率管的开关及分布参数的影响还存在一些毛
刺,可以通过共模电感加以抑制.
4
结语
新型低成本的CCMPFc控制器ICEIPCS01,与传统的
平均值电流控制器相比,无需直接来自交流电源的正弦波参考信号,外围器件少,外围电路简单,具有更快速的动态响圈4交流输入电压U。和电流Il波形
应、独特的软启动方式和更加完善的各种保护功能,应用于BoostPFC电路中,适应宽输入电压范围,采用的电流平均值控
制方法,使得功率因数近似为1.
参考文献:
F1]周志敏,周纪海,纪爱华.开关电源功率因数校正电路设计与应用[M].北京:人民邮电出版社,2004.[2]Ini,ineon
Technologies:ICElPCS012StandalonePowerFactorCorrectionControllerinContinuousConduction
Modeap—
plica2
TionnoterZ].2004.
[3]张占松,蔡宣三.开关电源的原理与设计I-M].北京:电子工业出版社,2004.
[4]DIXONLH.AverageCurrentModeControloi.SwitchingP20wesSupplles[z].Unitrode
PowerSupply
Design
Seminar
ManualSEM700.1990.
Studyof
a
Non—LinearControlofthePFCTechnology
RONGJunl.LIYi—min92
(1.DepartmentofInformationandCommunicationEngineering,H
unan
InstituteofScienceandTechnology,
Yueyang414006,HunanChina;2.DepartmentofComputer,HunanInstituteofScienceand
Technology,Yueyang414006,HunanChina)
Abstract:Beingdifferentfromthetraditionalsingle-phasePFCcircuitchipsusedto
control,flnewCCM
non—linearPFCcontroller_ICElPCS01
isused,and
a
newsingle-phasePFCcontrolcircuitisdesigned.
ComparedwiththetraditionalPFCsolutions,thenewICdoesn'tneedthereferencesinewavesignaldi—rectlyfromACpower.Thechip
uses
an
average
current
controlmethod,andPF
can
reach1.To
ensure
thePFandharmoniccomponentstomeettherequirementsunderthepremise,itgreatlyreducestheCOSt
ofthedesignofPFCconverter.Itcan
bewidelyusedinthesmallandmedium—sizedlow—costpowerPFC
circuit,andalsoprovides
fl
newwayofthinkingforPFC.
’
Keywords:PFC;ICElPCS01;controlcircuit
(责任编辑陈炳权)