Pib resistor muaj nuj nqi ntawm switching fais fab mov
Kev xaiv ntawm cov resistors nyob rau hauv kev hloov hom fais fab mov circuits tsis tsuas yog txiav txim siab lub hwj chim noj los ntawm qhov nruab nrab tam sim no tus nqi nyob rau hauv Circuit Court, tab sis kuj muaj peev xwm tiv taus lub siab tshaj plaws tam sim no. Ib qho piv txwv zoo yog lub zog sampling resistor ntawm qhov hloov MOS transistor, uas yog kev cob cog rua hauv series ntawm hloov MOS transistor thiab hauv av. Feem ntau, tus nqi tiv thaiv no tsawg heev, thiab qhov siab tshaj qhov poob qis tsis tshaj 2V. Nws zoo nkaus li tsis tsim nyog siv cov khoom siv hluav taws xob siab raws li kev siv hluav taws xob, tab sis xav txog lub peev xwm los tiv thaiv qhov siab tshaj plaws tam sim no ntawm kev hloov MOS transistor, qhov amplitude tam sim no ntawm lub sijhawm pib yog ntau dua li tus nqi ib txwm muaj. Nyob rau tib lub sijhawm, kev ntseeg siab ntawm cov resistor kuj tseem ceeb heev. Yog hais tias nws yog qhib Circuit Court vim tam sim no muaj feem xyuam rau lub sij hawm ua hauj lwm, ib tug mem tes siab voltage sib npaug zos rau cov khoom voltage ntxiv rau cov anti ncov voltage yuav raug generated ntawm ob lub ntsiab lus ntawm lub Circuit Court board uas tus resistor nyob, thiab nws yuav tawg. . Nyob rau tib lub sijhawm, kev sib koom ua ke ntawm IC ntawm lub overcurrent tiv thaiv Circuit Court kuj yuav tawg. Vim li no, feem ntau 2W hlau zaj duab xis resistor raug xaiv rau qhov resistor no. Hauv qee cov khoom siv hluav taws xob hloov hluav taws xob, 2-4 1W resistors txuas nrog rau tib lub sijhawm, tsis yog kom lub zog tawg, tab sis muab kev ntseeg tau. Txawm hais tias ib qho resistor qee zaus puas lawm, muaj ob peb lwm tus kom tsis txhob qhib Circuit Court. Ib yam li ntawd, tus qauv resistor rau qhov tso zis voltage ntawm lub zog hloov hluav taws xob kuj tseem ceeb heev. Thaum lub resistor qhib, qhov piv txwv voltage yog xoom volts, thiab PWM nti tso zis mem tes nce mus rau nws tus nqi siab tshaj plaws, ua rau muaj kev nce ntxiv hauv cov zis hluav taws xob ntawm lub zog hloov hluav taws xob. Tsis tas li ntawd, muaj kev txwv tam sim no rau optocouplers (optocouplers) thiab lwm yam.
Hauv cov khoom siv hluav taws xob hloov pauv, cov kev sib txuas ntawm cov resistors feem ntau tsis yog ua kom lub zog noj lossis ua haujlwm ntawm cov resistors, tab sis txhawm rau txhim kho lawv lub peev xwm tiv taus qhov siab tshaj. Nyob rau hauv dav dav, lub withstand voltage ntawm resistors tsis tseem ceeb heev. Qhov tseeb, cov resistors nrog lub zog sib txawv thiab qhov tseem ceeb tsis kam muaj qhov ua haujlwm siab tshaj plaws raws li qhov taw qhia. Thaum nyob rau hauv lub siab tshaj plaws kev khiav hauj lwm voltage, vim yog tsis tshua muaj siab tsis kam, nws lub hwj chim noj tsis pub tshaj tus nqi, tab sis kuj kuj yuav tawg. Yog vim li cas yog tias ntau yam nyias zaj duab xis resistors tswj lawv cov nqi tiv thaiv raws li lub thickness ntawm zaj duab xis. Rau cov resistors siab, tom qab zaj duab xis yog sintered, qhov ntev ntawm zaj duab xis yog txuas ntxiv los ntawm grooves. Qhov siab dua tus nqi tsis kam, qhov siab dua qhov zawj. Thaum siv nyob rau hauv high-voltage circuits, sparks thiab discharges tshwm sim ntawm grooves, ua rau kev puas tsuaj rau lub resistor. Yog li ntawd, hauv cov khoom siv hluav taws xob hloov hluav taws xob, qee zaum ob peb lub resistors txhob txwm txuas nrog hauv koob los tiv thaiv qhov tshwm sim no tshwm sim. Piv txwv li, qhov pib tsis ncaj ncees resistor nyob rau hauv ntau tus kheej zoo siab hloov khoom siv hluav taws xob, tus resistor txuas lub raj mus rau DCR nqus Circuit Court nyob rau hauv ntau yam hloov hluav taws xob khoom siv, thiab high-voltage feem thov resistor nyob rau hauv hlau halide teeb ballasts, thiab lwm yam.
PTC thiab NTC yog cov khoom siv thermal rhiab heev. PTC muaj qhov kub zoo coefficient loj, thaum NTC muaj qhov sib txawv, nrog qhov kub tsis zoo loj. Nws cov yam ntxwv tsis kam thiab kub, cov yam ntxwv volt ampere, thiab kev sib raug zoo ntawm lub sijhawm tam sim no txawv kiag li ntawm cov resistors zoo tib yam. Hauv cov khoom siv hluav taws xob hloov pauv, PTC resistors nrog qhov ntsuas kub zoo yog feem ntau siv hauv circuits uas yuav tsum tau siv hluav taws xob tam sim. Piv txwv li, nws tsav lub PTC siv nyob rau hauv lub hwj chim mov Circuit Court ntawm lub integrated circuit. Thaum lub hwj chim qhib, nws tus nqi qis kuj muab qhov pib tam sim no rau kev tsav tsheb sib txuas. Tom qab qhov kev sib txuas ua ke tsim cov khoom siv hluav taws xob, lub hloov hluav taws xob hloov kho qhov voltage thiab muab lub zog. Thaum lub sijhawm txheej txheem no, PTC cia li kaw qhov pib Circuit Court vim qhov nce ntawm qhov pib tam sim no kub thiab tsis kam. NTC tsis zoo kub yam ntxwv resistors yog dav siv raws li tam sim no limiting resistors rau instant input nyob rau hauv hloov hom fais fab mov, hloov tsoos cement resistors. Lawv tsis tsuas yog txuag lub zog tab sis kuj txo qhov kub ntawm qhov kub thiab txias. Thaum lub sijhawm tig ntawm lub zog hloov hluav taws xob, qhov pib them tam sim no ntawm lub lim dej capacitor yog qhov siab heev, thiab NTC sai sai. Tom qab lub ncov them ntawm lub capacitor, qhov kev tiv thaiv ntawm NTC resistor txo vim qhov kub thiab txias, thiab nws tswj nws cov nqi tsis tshua muaj zog nyob rau hauv ib txwm ua hauj lwm tam sim no lub xeev, zoo heev txo lub hwj chim noj ntawm tag nrho cov tshuab.
Tsis tas li ntawd, zinc oxide varistors kuj tau siv dav hauv kev hloov hluav taws xob hloov hluav taws xob. Zinc oxide varistors muaj qhov nrawm nrawm nrawm nrawm nrawm nrawm. Qhov loj tshaj plaws ntawm varistors yog tias thaum qhov hluav taws xob siv rau nws qis dua nws qhov pib, qhov tam sim no ntws los ntawm nws yog qhov me me, sib npaug rau lub valve kaw. Thaum qhov hluav taws xob tshaj qhov pib, qhov tam sim no ntws los ntawm nws surges, sib npaug rau lub valve qhib. Los ntawm kev siv qhov kev ua haujlwm no, nws tuaj yeem cuam tshuam qhov tshwm sim tsis tu ncua ntawm overvoltage hauv Circuit Court thiab tiv thaiv Circuit Court los ntawm kev puas tsuaj los ntawm overvoltage. Varistors feem ntau txuas nrog lub ntsiab lus ntawm kev hloov cov khoom siv hluav taws xob, uas tuaj yeem nqus tau qhov hluav taws xob siab vim los ntawm xob laim hauv daim phiaj hluav taws xob thiab muab kev tiv thaiv thaum lub zog hluav taws xob siab dhau.
