Lub Tswv Yim Tsim Kev Tiv Thaiv Raws Li LED Hloov Hloov Hluav Taws Xob
LED hloov fais fab mov overcurrent tiv thaiv Circuit Court
Hauv DC LED hloov hluav taws xob hluav taws xob hluav taws xob, txhawm rau tiv thaiv lub raj hloov pauv ntawm kev raug hlawv tawm thaum muaj hluav taws xob luv luv thiab tam sim no nce. Cov txheej txheem yooj yim yog los kho cov transistor mus rau qhov rov qab tsis ncaj ncees lub xeev thaum cov zis tam sim no tshaj ib qho nqi, yog li txiav tawm thiab txiav tawm tam sim no. Lub overcurrent tiv thaiv Circuit Court muaj ib tug transistor BG2 thiab ib tug voltage divider resistor R4 thiab R5.
Thaum lub voj voog ua haujlwm ib txwm muaj, qhov kev txiav txim siab ntawm R4 thiab R5 ua rau lub hauv paus muaj peev xwm ntawm BG2 siab tshaj qhov muaj peev xwm emitter, thiab cov emitter junction bears thim rov qab voltage. Yog li BG2 yog nyob rau hauv lub xeev txiav tawm (sib npaug rau ib qho qhib Circuit Court), uas tsis muaj kev cuam tshuam rau voltage stabilizing circuit. Thaum lub Circuit Court luv luv, cov zis voltage yog xoom, thiab lub emitter ntawm BG2 yog sib npaug rau hauv av. Yog li ntawd, BG2 yog nyob rau hauv ib tug saturated conduction xeev (sib npaug rau ib tug luv luv Circuit Court), ua lub hauv paus thiab emitter ntawm hloov raj BG1 nyob ze rau ib tug luv luv Circuit Court thiab nyob rau hauv ib tug txiav-tawm lub xeev, txiav tawm lub Circuit Court tam sim no thiab ua tiav cov hom phiaj tiv thaiv.
LED hloov fais fab mov overvoltage tiv thaiv Circuit Court
Kev tiv thaiv overvoltage ntawm tus hloov regulator nyob rau hauv DC LED switching fais fab mov muaj xws li input overvoltage tiv thaiv thiab tso zis overvoltage tiv thaiv. Yog tias qhov hluav taws xob ntawm qhov tsis raug tswj hwm DC lub zog hluav taws xob (xws li roj teeb thiab cov khoom siv hluav taws xob) siv nyob rau hauv lub tshuab hloov hluav taws xob siab dhau lawm, nws yuav ua rau lub tshuab hluav taws xob hloov mus ua haujlwm tsis zoo thiab ua rau cov khoom siv sab hauv puas. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum siv cov khoom siv hluav taws xob overvoltage tiv thaiv hauv LED hloov hluav taws xob khoom siv.
Kev tiv thaiv Circuit Court muaj xws li transistors thiab relays. Nyob rau hauv lub Circuit Court no, thaum lub voltage ntawm lub input DC fais fab mov yog siab tshaj qhov tawg voltage tus nqi ntawm lub voltage regulator diode, lub voltage regulator raj tawg, thiab ib tug tam sim no ntws los ntawm lub resistor R, ua rau transistor T ua. Lub relay ua, thiab ib txwm kaw kev sib cuag qhib, txiav tawm cov tswv yim. Lub polarity tiv thaiv Circuit Court ntawm cov khoom siv hluav taws xob tuaj yeem ua ke nrog cov khoom siv hluav taws xob tiv thaiv hluav taws xob los tsim kev tiv thaiv polarity tiv thaiv kev ntxub ntxaug thiab kev tiv thaiv overvoltage Circuit Court.
LED hloov fais fab mov mos pib tiv thaiv Circuit Court
Lub voj voog ntawm kev hloov hluav taws xob tswj hluav taws xob yog qhov nyuaj, thiab cov tswv yim kawg ntawm kev hloov hluav taws xob tswj hluav taws xob feem ntau txuas nrog cov khoom siv lim nrog me me inductance thiab loj capacitance. Thaum lub sijhawm pib, lub lim dej capacitor yuav ntws tawm tam sim no loj, uas tuaj yeem ua tau ob peb zaug ntawm cov khoom siv tam sim no. Xws li ib tug loj surge tam sim no yuav yaj cov kev sib cuag ntawm lub hwj chim zoo tib yam keyboards los yog relays, thiab ua rau lub input fuse tshuab. Tsis tas li ntawd, cov surge tam sim no tuaj yeem ua rau cov capacitors puas, ua rau lawv lub neej luv thiab ua rau muaj kev puas tsuaj ntxov ntxov. Vim li no, lub tam sim no limiting resistor yuav tsum tau txuas nrog thaum pib, thiab lub capacitor yuav tsum tau them los ntawm qhov tam sim no limiting resistor. Txhawm rau tiv thaiv qhov kev txwv tam sim no los ntawm kev siv lub zog ntau dhau, uas tuaj yeem cuam tshuam rau kev ua haujlwm ib txwm muaj ntawm lub tshuab hloov pauv, lub relay yog siv los txiav luv luv Circuit Court nws tom qab cov txheej txheem hloov pauv ntawm kev pib, kom DC fais fab mov ncaj qha khoom siv hluav taws xob. mus rau qhov hloov regulator. Qhov Circuit Court no hu ua "soft start" Circuit Court ntawm DC LED hloov hluav taws xob qhov chaw.
