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Savet #4 – Šta označava PFC u Mean Well katalozima?

28/04/2017 - 09:20, objavio automatizacija

PFC je akronim od eng. Power Factor Correction odnosno korekcija faktora snage. Svrha PFC-a je da poboljša odnos prividne i aktivne snage. Faktor snage kod Mean Well napajanja je samo 0,4~0,6 kod modela bez-PFC-a. Kod modela sa PFC funkcijom faktor snage može da dostigne vrednost iznad 0,95.

Prividna snaga = Ulazni napon x Ulazna struja
Aktivna snaga = Ulazni napon x Ulazna struja x Faktor snage

Sa stanovišta životne sredine, ovo znači da elektrana mora da generiše snagu koja je veća od prividne snage da bi obezbedila stabilnu električnu energiju na tržištu. Stvarna upotreba električne energije treba se definisati aktivnom snagom. Ukoliko pretpostavimo da je faktor snage 0,5, elektrana treba da proizvede 2VA da bi zadovoljila 1W aktivne snage. Na drugoj strani, ako je faktor snage 0,95, elektrani je potrebno da generiše samo 1,06VA da bi obezbedila 1W aktivne snage. Ovo znači da bi bila mnogo efikasnija.

Tagovi: 
mean well
prekidačka napajanja
saveti

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