Hloov cov khoom siv hluav taws xob niaj hnub ntsuas
I. Lub hom phiaj.
Txhawm rau ntsuam xyuas seb tus nqi hluav taws xob SMPS puas ua tau raws li qhov yuav tsum tau ua ntawm cov qauv ntsuas hluav taws xob hauv lub tebchaws (cov lus qhia tshwj xeeb tau txhais raws li cov kev cai ntawm lub teb chaws cov qauv).
II. Cov cuab yeej thiab cov cuab yeej siv los siv.
(1). AC SOURCE / alternating tam sim no fais fab mov.
(2). ELECTRONIC LOAD / Electronic Load.
(3). AC POWER METER / lub zog ntsuas.
III. Kev Xeem.
(1). Input voltage tej yam kev mob yog 115Vac/60Hz thiab 230Vac/50Hz nrog 220Vac/50Hz/60Hz tej yam kev mob.
(2). Output load tej yam kev mob tsis muaj load, 1/4 max. load, 2/4 max. load, 3/4 max. load, thiab max. thauj khoom.
Kev sim
(1). Ua kom sov cov khoom nyob rau hauv nws qhov nominal tso zis load rau 30 feeb ua ntej kuaj.
(2). Sau cov input fais fab (Pin), input tam sim no (Iin), tso zis voltage (Vo), thiab lub hwj chim factor (PF) ntawm 115Vac / 60Hz thiab 230Vac / 50Hz feem nyob rau hauv nqe lus txib ntawm load.
Tom qab ntawd xam cov efficiency ntawm txhua yam load.
(3). Thaum tsis muaj load tsuas yog lub zog nkag (Pin) thiab cov tswv yim tam sim no (Iin) yuav tsum tau sau tseg.
(4). Xam qhov nruab nrab efficiency ntawm plaub loads ntawm 115Vac / 60Hz thiab 230Vac / 50Hz, uas yog tus nqi efficiency ntawm lub zog efficiency.
V. Cov lus txhais.
CEC / USA EPA / Australia thiab New Zealand Energy Efficiency Specification Value Standard (Class IV);
(1). Cov specifications ntawm Class IV efficiency yog: 1).Po<1W, Average Eff. ≥0.5*Po; 2).1≤Po≤51W, Average Eff. ≥0.09*Po; 3).1≤Po≤51W, Average Eff. ≥0.09*Po; 4).
Average Eff. ≥0.09*Ln(Po)+0.5; 3).Po>51, Average Eff. Ntau dua lossis sib npaug rau 0.85.
(2). Lub tswv yim tsis muaj lub hwj chim tshwj xeeb yog: 1) 0
(3). Po yog cov khoom ntawm qhov ntsuas qhov tso zis voltage thiab ntsuas cov zis tam sim no raws li tau teev nyob rau ntawm daim ntawv teev npe.
(4). Qhov nruab nrab efficiency tus nqi thiab input tsis muaj-load hwj chim tus nqi ntawm qhov tseeb xeem yuav tsum tau raws li cov specifications nyob rau tib lub sij hawm kom tau raws li tus qauv yuav tsum tau.
Thib rau, piv txwv txoj kev suav:
(1). 12V/1A zog efficiency=(0 09*ln12+0.5 )*100%=(0.09*2.{13} }.5)*100%=72.36%;.
(2). Lub zog tawm tswv yim Tsawg dua lossis sib npaug rau 0.5W.
