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1、毕业设计中文题目60W反激式LED恒流驱动开关电源的设计英文题目Designof60WFlybackLEDConstantCurrentDriveSwitchingPowerSupply专业:电气工程及其自动化60W反激式LED恒流驱动开关电源的设计60w反激式LED恒流驱动开关电源的设计【摘要】:如今,全世界资源稀缺,节能意识深入人心。随着LED的出现,全球的照明行业迎来了一场巨大的改革,LED的节能、轻便、小巧等优点使它广受欢迎。随着LED的发展,LED开关电源的重要性日益突出,因此,研究高效率的LED驱动电源的任务被提上了进程。本文设计的60w反激式LED恒流驱动
2、开关电源,结合了电路的拓扑、EMI电路、钳位电路、整流电路、控制电路和反馈电路等电路进行了开关电源的设计。选用KBP206代替传统的整流桥,并且使用UC3842专用芯片进行控制电路的设计,通过阻容电路进行UC3842开关频率的设置,通过反馈电路调节输出电流,提高恒流精度。此外,RCD钳位电路还能起到吸收尖峰电压的作用,EMI电路起到平缓电压突变、消除干扰和滤波的作用。运用AP法进行变压器磁芯的选择,并且计算变压器的各个参数,包括:占空比、原边匝数、副边匝数、导线直径等。在实际中运用示波器检测开关电源的各个部分输出波形,进行理论与实际的比较,判断设计达到了设计目标。【关键
3、词】:开关电源;反激式;LED驱动;恒流源IV60W反激式LED恒流驱动开关电源的设计Designof60WFlybackLEDConstantCurrentDriveSwitchingPowerSupply【Abstract】:Nowadays,energy-savingconsciousnessisdeeplyrootedfortheshortageofglobalenergy,andthegloballightingindustryhasusheredinatremendousreformwiththeadventofLED.Alargenumberofmerit
4、scontributetothepopularityofLED,suchassavingenergy,beingportableandcompact,etc.WiththedevelopmentofLED,theimportanceofLEDswitchingpowersupplieshasbecomeincreasinglynoticeable.Thus,thenecessityofinvestigatinghigh-efficiencyLEDdrivingpowersupplieshasbeenputonthecourse.Thispaperaimsatanalyz
5、ingthedesignofa60WflybackLEDconstantcurrentdriveswitchingpowersupply.Itisdesignedbasedoncircuittopology,EMIcircuit,clampcircuit,rectifiercircuit,controlcircuitandfeedbackcircuit.TheKBP206ismadeusedofratherthanthetraditionalrectifierbridge,andaUC3842dedicatedchipisamicrocircuittodesignthe
6、controlcircuit.TheUC3842switchingfrequencyissetbytheRCcircuit,andtheoutputcurrentisadjustedbythefeedbackcircuittoimprovetheconstantcurrentaccuracy.What’smore,theRCDclampcircuitcan absorbthespikevoltageaswell.TheEMIcircuitplaysapartinsmoothingtheabruptvoltagechange,eliminatinginterference
7、,andfilteringwaves.ItadoptsAPmethodtoselectthetransformercore,andcalculatethevariousparametersofthetransformer,containingdutycycle,thenumberofprimarysideturns,thenumberofsecondarysideturnsaswellaswirediameter.Theoscilloscopeisusedfordetectingtheoutputwaveformsofvariouspar