Qee tus phooj ywg nug txog cov laj thawj thiab cov txheej txheem kho mob ntawm cov teeb liab LED ntsais, thiab qee tus neeg xav nug vim li cas cov teeb liab LED tsis ci. Muaj dab tsi tshwm sim? Qhov tseeb, muaj peb qhov kev ua tsis tiav thiab kev daws teeb meem rau cov teeb liab.
Peb qhov teeb meem ntawm LED teeb liab teeb thiab kev daws teeb meem feem ntau:
Ib qho teeb meem uas feem ntau tshwm sim yog qhov rectifier tsis ua haujlwm. Mus rau lub nroog teeb pom kev zoo thiab yuav ib qho thiab hloov nws. Tag nrho cov leds tsis tshua muaj kev puas tsuaj.
Ob. Teeb liab LED teeb liab vim li cas:
1. Lub zog ntawm lub teeb thiab lub zog tsav LED tsis sib xws, cov teeb ib txwm muaj 1W muaj zog li ntawm 280-300 ma tam sim no thiab 3.0-3.4V voltage, yog tias lub teeb tsis muaj zog txaus, yuav ua rau lub teeb ci ntsa iab, yog tias tam sim no loj dhau, lub teeb yuav tsis tuaj yeem tiv taus qhov hloov. Hauv cov xwm txheej hnyav, cov xov hlau kub lossis tooj liab hauv cov hlaws tuaj yeem hlawv tawm, ua rau cov hlaws tsis ua haujlwm.
2. Lub hwj chim tsav tsheb tej zaum yuav puas lawm, tsuav yog koj hloov nws nrog lwm lub hwj chim tsav tsheb zoo, nws yuav tsis ntsais muag.
3. Yog tias tus tsav tsheb muaj lub luag haujlwm ntawm kev tiv thaiv kub dhau, qhov kev ua haujlwm ntawm lub teeb LED teeb liab tsis tuaj yeem ua tau raws li qhov yuav tsum tau ua, thiab qhov kev tiv thaiv kub dhau ntawm tus tsav tsheb yuav ntsais thaum nws pib ua haujlwm. Piv txwv li, lub tsev teeb pom kev zoo 20 w siv los sib sau ua ke 30W teeb tsis ua haujlwm zoo ntawm kev txias.
4. Yog tias cov teeb sab nraum zoov kuj muaj cov tsos mob stroboscopic, nws txhais tau tias cov teeb raug dej nyab. Yog li ntawd, yog tias nws ntsais muag, nws tsis ci. Lub teeb thiab tus tsav tsheb tawg. Yog tias tus tsav tsheb ua haujlwm zoo ntawm kev tiv thaiv dej, lub teeb hlaws tawg thiab lub teeb qhov chaw tuaj yeem hloov pauv.
Peb. Kev ua ntawm lub teeb liab coj teeb ci ntsa iab:
1. Hauv cov ntawv thov teeb pom kev zoo LED uas siv hluav taws xob tsawg, cov qauv fais fab feem ntau yog cov qauv flyback cais. Lub Green Dot, tus tsav tsheb LED 8W off-line, ua tau raws li cov qauv teeb pom kev zoo ntawm lub zog Star. Hauv qhov kev tsim qauv, vim tias qhov hloov pauv hluav taws xob sinusoidal square wave ntawm lub flyback regulator tsis muab lub zog tas mus li rau qhov kev cuam tshuam thawj zaug, lub voj voog dynamic tus kheej tuaj yeem ua haujlwm thiab ua rau lub teeb ci ntsa iab. Txhawm rau kom tsis txhob muaj teeb meem no, nws yog qhov tsim nyog los ua qhov kev tso tawm thawj zaug hauv txhua lub voj voog ib nrab. Yog li ntawd, nws yog qhov tsim nyog los xaiv cov peev xwm thiab cov nqi tiv thaiv ntawm cov teeb liab LED uas tsim lub voj voog kom raug.
2. Feem ntau lub qhov muag tib neeg tuaj yeem pom lub teeb ci ntsa iab ntawm qhov zaus ntawm 70 Hz, tab sis saum toj no nws tsis tuaj yeem pom. Yog li ntawd, hauv cov ntawv thov teeb pom kev zoo LED, yog tias lub teeb liab muaj qhov sib xyaw zaus qis nrog zaus qis dua 70 Hz, lub qhov muag tib neeg yuav hnov lub teeb ci ntsa iab. Tau kawg, muaj ntau yam uas tuaj yeem ua rau lub teeb LED ntsais muag hauv ib daim ntawv thov tshwj xeeb.
3. Cov lim dej Emi yog qhov xav tau txawm tias nyob rau hauv cov ntawv thov tsav tsheb uas muab kev kho qhov zoo ntawm lub zog thiab txhawb kev tsaus ntuj ntawm peb-terminal bi-directional SCR switches. Lub transient tam sim no induced los ntawm cov kauj ruam ntawm triterminal bidirectional SCR switch excites lub resonance ntuj ntawm inductors thiab capacitors hauv emi lim.
Yog tias qhov yam ntxwv resonance ua rau qhov input tam sim no qis dua qhov tuav tam sim no ntawm peb-terminal bi-directional SCR switch element, peb-terminal bi-directional SCR switch element yuav raug tua. Tom qab ncua sijhawm luv luv, peb-terminal bidirectional SCR switching element feem ntau yuav tig dua los ua kom muaj tib lub resonance. Cov xwm txheej no yuav rov ua dua ntau zaus hauv ib nrab lub voj voog ntawm INPUT fais fab waveform ntawm LED semaphore, ua rau pom LED flickering.
Lub sijhawm tshaj tawm: Lub Peb Hlis-11-2022
