Thaum lub teeb qhov muag teev yog ib qho kev tsim tshiab, ib qho khoom siv tau muab tso rau hauv qhov muag teev. Lub hom phiaj ntawm cov cuab yeej no yog txhawm rau txo tus nqi tam sim no hauv hluav taws xob hluav taws xob. Cov cuab yeej no hu ua Ballast. Yog hais tias qhov no tsis tau siv nyob rau hauv lub teeb qhov muag teev thiab T8 lub teeb qhov muag teev (tube Lights), tseem muaj kev pheej hmoo ntawm tam sim no nce mus rau ib qho kev puas tsuaj. Ballast tseem siv nyob rau hauv qhov muag teev thiab lub teeb lub raj kom tsis txhob muaj kev nce hauv lub teeb tam sim no. Hlau halide, mercury vapor, thiab HID kuj yog cov piv txwv tseem ceeb ntawm cov teeb siv ballasts.
Muaj ob lub ntsiab ntawm ballasts; Sib nqus ballast thiab hluav taws xob Ballast (aka Electronic Ballast) thiab peb yuav tshuaj xyuas ob qho tib si.
Sib nqus Ballast
Sib nqus ballasts yog qhov pib inductors uas muab qhov pib tsim nyog thiab kev ua haujlwm hluav taws xob rau lub zog qee lub teeb. Ua hauj lwm raws li ib tug transformer, muab huv si thiab meej zog. Tsim nyob rau xyoo 1960, lawv hais tias kev siv loj hauv 70-90s. Lawv pom hauv Hlau Halide, mercury vapory, florescent teeb, neon teeb, lossis High Intensity Discharge (HID) teeb. Yuav luag txhua qhov chaw nres tsheb loj thiab teeb pom kev tau siv cov thev naus laus zis no li ntawm 30 xyoo ua ntej LED pib coj mus rau xyoo 2010.
Hluav taws xob Ballast
Nyob rau hauv ib qho hluav taws xob ballast, ib qho hluav taws xob hluav taws xob yog siv los txwv cov khoom thauj lossis cov nqi tam sim no. Cov hluav taws xob ballast tau sim ua kom muaj kev ruaj khov thiab meej tam sim no piv rau cov hlau nplaum. Cov no tau nrov nyob rau hauv 90s thiab mus txog niaj hnub no qhov twg lawv tseem raug teeb tsa. Ntseeg nws lossis tsis ntseeg, txawm tias xyoo 2017, qee cov neeg tsis tau yuav LED lub teeb thiab tseem xaiv cov thev naus laus zis qub.
Function ntawm Ballast
Lub ballast tswj qhov tam sim no rau cov teeb thiab muab qhov hluav taws xob txaus los pib lub teeb. Lub teeb tsis muaj tus tswj hwm thiab tuaj yeem kos ntau dhau lossis tsawg dhau ntawm lawv tus kheej. Lub ballast ua kom paub tseeb tias tus nqi tam sim no muab rau lub teeb tsis ntau tshaj li qhov tshwj xeeb ntawm lub teeb. Yog tsis muaj ballast, lub teeb lossis lub teeb yuav nrawm nrawm rau nws qhov kos tam sim no thiab nws tuaj yeem tswj tsis tau thiab.
Thaum lub ballast tam sim no nyob rau hauv lub teeb, lub zog yuav ruaj khov, thiab txawm tias cov teeb no txuas nrog cov khoom siv hluav taws xob siab, lub ballast yuav tswj lub zog thiab tsis txhob nce tam sim no.
Vim li cas LEDs tsis siv Ballast
LEDs tsis xav tau lub ballast vim muaj ntau yam laj thawj. Ua ntej, ntau qhov tam sim no tsis xav tau hauv cov qij LED. Tsis tas li ntawd, LEDs feem ntau siv Direct tam sim no (DC) thiab yog li xav tau AC rau DC converter. Qhov no yog vim li cas thaum retrofitting rau LED pob kws teeb qhov muag teev koj yuav tsum tau ncaj qha xaim lub qhov (socket). Thaum kawg, qhov loj ntawm LEDs yog me dua qhov muag teev thiab lub teeb lub teeb, uas tsis muaj qhov chaw ntxiv rau lub ballast kom haum rau hauv. LED tsav tsheb tuaj yeem tsim ua kom me dua. Qee cov kws tshaj lij kuj ntseeg tias qhov tsis muaj ballast ua rau LEDs lub zog txuag thiab lawv muab lub teeb zoo dua.
Cov lus teb tiag tiag ntawm no yog LEDs siv tus tsav tsheb, uas ua ntau yam zoo ib yam li lub ballast tab sis ua haujlwm zoo dua.
LED tsav tsheb yog ib qho khoom siv hluav taws xob uas tswj lub zog rau lub teeb ci LED. Nws muaj peev xwm tswj hwm lub zog rau ib lub teeb ci LED lossis cov hlua ntawm LEDs. Tus tsav tsheb LED teb tau zoo rau kev hloov pauv lub zog xav tau ntawm LED. Lub tshuab ziab khaub ncaws muab lub zog tas li thiab tsis sib xws ntawm lub zog rau LED vim nws cov khoom hluav taws xob hloov pauv nrog qhov kub thiab txias. Cov tsav tsheb LED tuaj yeem dhau los ua qhov tsis zoo los ntawm kev hloov pauv ntawm cov mem tes dav thiab yuav muaj ntau tshaj li ib txoj hauv kev rau kev tswj hwm ntawm cov LED sib txawv. Lub zog theem ntawm LEDs yog khaws cia nyob rau theem tas li thiab nws yog ua los ntawm LED tsav tsheb. LED tsav tsheb ua haujlwm zoo ib yam li lub ballast tab sis nws ua haujlwm zoo dua.
