Puas yog Ordinary DC LED Tubes haum rau cov tsheb ciav hlau?

Puas yog Ordinary DC LED Tubes haum rau cov tsheb ciav hlau?

Hauv railway dov daim ntawv thov, ib qho ntawm cov teeb meem tseem ceeb hauv cov khoom siv hluav taws xob fim yog qhovkev hloov pauv thiab kev cuam tshuam ib ntus ntawm cov khoom siv hluav taws xob. EN 50155 tus qauv, raws li cov lus qhia dav dav rau cov khoom siv hluav taws xob siv rau hauv cov khoom dov, ua kom pom tseeb thiab yuav tsum tau ua raws li kev hloov pauv ntawm cov khoom siv hluav taws xob, kev cuam tshuam, thiab kev hloov pauv. Thaum ua ntawv thov tus qauv DC12-48V qis-voltage LED raj hauv ib puag ncig zoo li no, yuav tsum muaj kev tshuaj xyuas zoo thiab tsim qauv tsim nyog.

Ob qhov xwm txheej tseem ceeb:

Qhov yuav tsum tau muaj kev cuam tshuam hluav taws xob (10ms tuav- lub sijhawm nce): Tus qauv qhia tias cov khoom siv yuav tsum tau ua haujlwm ntxiv raws li tau teev tseg (S2 qib yuav tsum tau) yog tias qhov cuam tshuam ntawm qhov hluav taws xob tsis tshaj 10ms. Qhov kev xav tau no simulates qhov xwm txheej hnyav uas lub kaw lus nthuav tawm "tsis muaj impedance" (luv luv luv) lub xeev tom qab lub overload los yog txhaum ntawm lub hwj huam mov tsheb raug tshem tawm. Nws yog ib qho tsim nyog sau cia tias thaum lub sijhawm rov qab los ntawm kev cuam tshuam zoo li no, lub nra tuaj yeem tsim qhov rov qab tsis zoo siab tshaj plaws tam sim no, cuam tshuam rau lub voj voog tsav.

Lub zog hloov pauv yuav tsum tau ua (0.6 Un rau 100ms): Tus qauv kuj tseem qhia txog qhov yuav tsum tau muaj qhov ntsuas qhov ntsuas hluav taws xob - cov khoom siv yuav tsum muaj peev xwm txuas ntxiv ua haujlwm ib txwm muaj tsawg kawg yog 100ms thaum qhov hluav taws xob nkag mus rau 60% ntawm tus nqi nominal (0.6 × Un), yam tsis muaj kev cuam tshuam. Qhov no simulates qhov voltage poob scenario thaum lub tsheb ciav hlau hloov ntawm cov khoom siv hluav taws xob sib txawv lossis muaj kev hloov pauv tam sim ntawd.

Kev xa tawm tus qauv DC12-48V LED raj ncaj qha rau hauv ib puag ncig kev tsheb ciav hlau nthuav tawm ntau yamtechnical bottlenecks:

Txhawm rau ua kom tau raws li cov lus hais saum toj no, DC12-48V LED tubes npaj rau kev siv tsheb ciav hlau xav tau cov phiaj xwm kev tsim kho ntawm qib hauv qab no:

Incorporate Tuav-up Circuitry: Txhawm rau tiv thaiv lub teeb los ntawm kev tua thaum lub sij hawm 10ms cuam tshuam, lub zog cia yuav tsum tau ntxiv ntawm lub zog hluav taws xob. Txoj kev uas feem ntau yog paralleling electrolytic capacitors rau lub zog cia. Tus nqi capacitance yuav tsum raug xam raws li qhov tsawg kawg nkaus input voltage, tso zis zog, thiab lub sijhawm 10ms. Piv txwv li, hauv 24V system, ntsib 10ms tuav- lub sijhawm tuaj yeem xav tau ntau txhiab microfarads ntawm lub peev xwm.

Optimize Driver Topology: Yuav kom ua tau raws li qhov yuav tsum tau ua ntawm kev khiav hauj lwm ntawm 0.6 × Un (piv txwv li, 28.8V nyob rau hauv 48V system) rau 100ms, tus tsav tsheb IC yuav tsum featuredav input voltage muaj peev xwmthiab alow undervoltage lockout (UVLO) point. Nws raug nquahu kom xaiv cov neeg tsav tsheb txhawb nqa lossis buck -boost topologies. Cov no ua kom cov zis tam sim no tseem nyob tas li txawm tias thaum lub zog hluav taws xob nkag mus, tiv thaiv flicker lossis ploj mus.

Siv Kev Tiv Thaiv Kev Tiv Thaiv thiab Tiv Thaiv: Txhawm rau tiv thaiv qhov thim rov qab inrush tam sim no thaum rov qab los, kev tiv thaiv kev tiv thaiv yuav tsum tau ntxiv rau ntawm cov khoom siv. Qhov no suav nrog kev tiv thaiv rov qab polarity diode thiab lub inrush tam sim no limiting Circuit Court (xws li, NTC thermistor los yog lub hwj chim resistor bypassed los ntawm diode) los tiv thaiv tam sim no loj surges los ntawm kev puas tsuaj Cheebtsam.

Electromagnetic Compatibility (EMC) Tsim: Ua raws li tus qauv EN 50121 yog qhov tsim nyog, xav kom lub cuab yeej muaj lub zog hluav taws xob tiv thaiv kab mob tiv thaiv kev cuam tshuam xws li surges thiab hluav taws xob ceev ceev (EFT).

Cov ntsiab lus thiab cov lus pom zoo

Standard DC12-48V LED rajtsis tuaj yeem ntsib ncaj qhaTS EN 50155 Cov kev cai hais txog kev cuam tshuam hluav taws xob (10ms) thiab qhov hluav taws xob poob (0.6Un / 100ms). Txhawm rau ua kom muaj kev siv tsheb ciav hlau, tus tsav tsheb circuitry yuav tsum tau ua tshwj xeebtuav-txoj kev tsim hluav taws xobthiabdav -voltage input optimization.

Kev pom zoo: Xaiv lossis kho cov tsav tsheb LED uas muaj "lub zog- tawm tuav- nce" ua haujlwm. Cov tsav tsheb no koom ua ke nrog cov khoom ntim cia hauv lub cev lossis lub cev muaj zog tuav- nce circuits kom ntseeg tau tias cov zis tsis cuam tshuam thaum lub sijhawm 10ms cuam tshuam. Qhov tseem ceeb, xyuas kom meej tias tus neeg tsav tsheb nws tus kheej tuav cov ntawv pov thawj rau EN 50155, EN 50121 (EMC), thiab EN 61373 (kev co thiab kev poob siab). Yog hais tias ua hauj lwm lub txhab nyiaj sab nraud capacitor rau tuav - nce, ua tib zoo mloog rau cov capacitors 'voltage ntsuam xyuas (yuav tsum suav rau 1.4 npaug ntawm qhov kev hloov pauv dhau los) thiab cuam tshuam tam sim no. Tsuas yog los ntawm kev tsim qauv zoo nkauj no tuaj yeem txhim khu kev lag luam ntawm qis -voltage LED raj tau lav nyob rau hauv lub zog siv hluav taws xob ib puag ncig ntawm cov tsheb ciav hlau niaj hnub no.

T8 Tube DC Input

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