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Cov txheej txheem rau Limiting DC Power Supply Tam Sim No Hloov

Mar 16, 2023

Cov txheej txheem rau Limiting DC Power Supply Tam Sim No Hloov

 

1. Series kuj txoj kev


Yog tias qhov kev tiv thaiv loj thiab cov mem tes tam sim no me me, tab sis qhov kev siv hluav taws xob ntawm qhov tsis kam yog loj, qhov kev cuam tshuam tsis zoo yuav tsum raug xaiv kom cov mem tes tam sim no thiab lub zog noj ntawm qhov tsis kam yog nyob rau hauv qhov kev pom zoo.


Thaum txuas nrog lub tshuab hluav taws xob DC, cov khoom siv hluav taws xob sib txuas yuav tsum muaj peev xwm tiv taus cov hluav taws xob siab thiab cov hluav taws xob siab. Nyob rau hauv daim ntawv thov no, ib tug resistor nrog ib tug siab tam sim no ntsuam xyuas yog tsim nyog. Wirewound resistors feem ntau txais los ntawm DC fais fab mov manufacturers, tab sis nyob rau hauv high humidity resistors yuav tsum tsis txhob wirewound. Vim tias cov hluav taws xob tsis zoo ntawm cov hlau windings nyob rau hauv cov av noo siab, cov thermal kev nyuaj siab tam sim ntawd thiab kev nthuav dav ntawm cov windings yuav degrade qhov kev ua tau zoo ntawm cov txheej txheem tiv thaiv thiab tuaj yeem ua rau cov hluav taws xob tsis zoo vim muaj kev cuam tshuam cov dej noo.


2. Thermal resistance method


Hauv cov khoom siv hluav taws xob me me hloov hluav taws xob, thaum lub zog hloov hluav taws xob pib, lub thermistor muaj NTC siab dua tus nqi, uas tuaj yeem txwv qhov siab tshaj tam sim no. Raws li NTC heats li, nws cov nqi kuj txo, uas txo hwj chim noj nyob rau hauv kev khiav hauj lwm tej yam kev mob.


Txoj kev thermistor kuj muaj qhov tsis zoo: Thaum lub sijhawm pib, lub thermistor xav tau lub sijhawm kom ncav cuag nws cov nqi tiv thaiv raws li kev ua haujlwm. Yog hais tias lub input voltage nyob ze rau tus nqi me me uas lub hwj huam mov tuaj yeem ua haujlwm, yuav muaj qhov hluav taws xob loj loj thaum pib pib vim yog lub thermistor loj. Lub hwj chim mov tuaj yeem khiav hauv hom hiccup. Thaum lub tshuab hluav taws xob hloov hluav taws xob raug kaw, lub thermistor xav tau lub sijhawm txias rau nws qhov kev tiv thaiv kom nce mus rau qhov kub thiab txias. Lub sijhawm txias yog feem ntau 1 feeb, nyob ntawm cov khoom siv, kev teeb tsa thiab kev ntsuas kub. Tom qab lub tshuab hluav taws xob qhib tom qab lub tshuab hluav taws xob tsis ua haujlwm, lub thermistor tsis tau txias, thiab lub inrush tam sim no tau poob nws qhov kev txwv nyob rau lub sijhawm no, yog li lub zog hluav taws xob uas tswj cov inrush tam sim no tsis tuaj yeem qhib tom qab lub hwj chim. ua tsis tiav.


3. Active inrush tam sim no txwv txoj kev


Rau high-power circuit breakers, lub inrush tam sim no limiter yuav tsum luv luv-circuited thaum lub sij hawm ib txwm ua hauj lwm, uas yuav txo tau lub hwj chim noj ntawm inrush tam sim no limiter.


Nyob rau hauv no triac pib Circuit Court, thyristor tsuas yog powered los ntawm ib tug kauj ntawm lub ntsiab breaker transformer. Qhov kev ncua sij hawm pib ntawm SCR yog muab los ntawm kev pib qeeb ntawm kev hloov hluav taws xob, tso cai rau cov khoom siv hluav taws xob R1 los sau cov input capacitance ua ntej lub hwj huam mov pib.

 

Laboratory power supply

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