Hwj chim Mov tiv thaiv

Hwj chim Mov pob khoom

Muaj ntau ntau lwm yam ntxwv uas cuam tshuam hwj chim-mov lag luam. Cov no yog cov neeg ua hauj lwm los mus tiv thaiv cov mov, uas muaj li nram no.

Overcurrent : A tsis ua hauj lwm hom tshwm sim los ntawm tso zis load tam sim no uas yog ntau tshaj qee. Nws tsuas yog los ntawm lub siab tshaj plaws tam sim no muaj peev xwm ua ntawm lub hwj huam mov thiab tshuaj los ntawm sab hauv kev tiv thaiv circuits. Nws tseem yuav ua puas lub hwj huam mov nyob rau hauv tej rooj plaub. Luv circuits ntawm lub hwj chim-mov tso zis thiab av muaj peev xwm tsim currents nyob rau hauv lub system uas yog tsuas los ntawm lub siab tshaj plaws tam sim no muaj peev xwm ua thiab nrog impedance ntawm lub hwj huam mov. Yog tsis muaj ciaj ciam, qhov no siab tam sim no muaj peev xwm ua rau overheating thiab puas lub hwj huam mov raws li zoo raws li lub load thiab nws interconnects (luam Circuit Court board ib co kua nplaum, cables). Yog li ntawd, feem ntau cov khoom siv fais fab yuav tsum tau muaj tam sim no txawj (overcurrent tiv thaiv) uas activates yog hais tias tus tso zis tam sim no tshaj ib tshaj plaws.

Overtemperature:  A kub uas yog saum toj no lub hwj huam mov tus kev cai tswjhwm tus nqi yuav tsum tau tiv thaiv los yog nws yuav ua rau lub hwj chim-mov tsis ua hauj lwm. Ntev li khiav hauj lwm kub yuav ua kev puas ib lub hwj chim mov thiab cov circuits kev cob cog rua rau nws. Yog li ntawd, muaj ntau yam khoom siv ntiav ib tug kub sensor thiab kab circuits lov tes taw rau mov yog hais tias nws khiav hauj lwm kub tshaj ib lub nqi. Nyob rau hauv kev, semiconductors siv nyob rau hauv lub mov yog lam tau lam ua rau kub tshaj lawv teev tseg. Muaj ntau cov khoom siv xws li overtemperature kev tiv thaiv uas puv tawm lub mov yog hais tias tus kub tshaj lub teev tsis pub tshaj.

Overvoltage:  Qhov no tsis ua hauj lwm hom tshwm sim yog hais tias tus tso zis voltage mus saum lub teev dc nqi, uas muaj peev xwm kom ntev li dc voltage hu plig lub load circuits. Feem ntau, hluav taws xob system loads yuav mas mus txog 20% overvoltage tsis muaj incurring tej puas. Yog hais tias qhov no yog ib tug saib xyuas, xaiv ib lub mov uas minimizes no uas yuav muaj. Muaj ntau cov khoom siv xws li overvoltage kev tiv thaiv uas puv lub mov tawm yog hais tias qhov tso zis voltage tshaj ib tus nqi. Lwm mus kom ze yog ib tug crowbar zener diode uas ua txaus tam sim no nyob rau overvoltage pib li hais tias nws activates lub hwj chim-mov tam sim no txawj thiab nws kaw tau cia.

Mos Start:  Inrush tam sim no muaj kev txwv tej zaum yuav tsum tau thaum lub hwj chim yog thawj thov los yog thaum tshiab boards yog kub xob. Feem ntau, qhov no yog tiav los ntawm ib tug mos mos-pib Circuit Court hais tias slows tus thawj sawv ntawm tam sim no thiab ces tso cai lag luam. Yog hais tias tsis kho, cov inrush tam sim no yuav ua kom muaj ib tug siab ncov them tam sim no uas raug nyiaj cov zis voltage. Yog hais tias qhov no yog ib qho tseem ceeb xav, xaiv ib lub mov nrog no feature.

Undervoltage Lockout:  Paub li UVLO, nws puv lub mov rau thaum nws nce mus txog ib tug siab txaus cov tswv yim voltage thiab puv tawm lub mov yog hais tias tus tswv yim voltage ntog hauv qab no ib tug tej yam muaj nuj nqis. Qhov no feature yog siv rau cov khoom siv khiav hauj lwm ntawm nqi hluav taws xob hwj chim raws li lub roj teeb lub hwj chim. Thaum ua los ntawm roj teeb raws li lub hwj huam UVLO disables lub hwj huam mov (raws li tau zoo raws li lub system) yog tias lub roj teeb ntswg heev npaum li cas hais tias nws dauv mov lub tswv yim voltage tsawg tsawg heev cia txhim khu kev qha cov lag luam.

Electromagnetic Compatibility (EMC):  yuav tsim cov tswv yim uas txo electromagnetic cuam (EMI). Nyob rau hauv hloov-hom khoom siv fais fab, ib tug dc voltage yog hloov dua siab tshiab mus rau ib tug tws los yog ib tug pulsed waveform. Qhov no ua rau cov fais fab mov los ua kom muaj nqaim-band suab nrov (EMI) nyob rau hauv qhov siv ntawm cov switching zaus thiab nws cov txuam harmonics. Yuav kom muaj lub suab nrov, manufacturers yuav tsum txo faib los yog ua emissions.

Fais fab mov manufacturers txo EMI tawg los ntawm muab cov mov nyob rau hauv ib tug hlau lub thawv los yog tsuag txheej cov ntaub ntawv nrog ib tug metallic khoom. Manufacturers kuj yuav tsum them sai sai mus rau lub hauv layout ntawm lub mov thiab cov xov uas mus nyob rau hauv thiab tawm ntawm lub mov, uas muaj peev xwm ua kom muaj suab nrov.

Feem ntau ntawm cov ua cuam nyob rau hauv lub hwj chim kab yog lub txiaj ntsim ntawm lub ntsiab switching transistor los yog tso zis rectifiers. Nrog hwj chim-tau kho thiab kom transformer tsim, kev twb kev txuas ntawm lub tshav kub tog, thiab lim tsim, lub hwj chim-mov chaw tsim tshuaj paus yuav txo tau ua cuam li hais tias cov mov peev xwm ua tau EMI ntxawg koom haum approvals tsis muaj incurring ntev lim nqi. Nco ntsoov xyuas kom pom tias lub hwj chim-mov chaw tsim tshuaj paus muaj raws li qhov yuav tsum tau muaj lub ntxawg EMI qauv.


Post lub sij hawm: Apr-23-2018
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