3-theem transformers feem ntau muaj tsawg kawg yog 6 windings- 3 thawj thiab 3 theem nrab. Lub hauv paus thiab theem nrab windings tuaj yeem txuas rau hauv cov kev teeb tsa sib txawv kom ua tau raws li qhov xav tau sib txawv. Hauv kev siv ntau, cov windings feem ntau txuas nrog hauv ib qho ntawm ob qho kev teeb tsa nrov: Delta lossis Wye.
DELTA kev sib txuas
Hauv kev sib txuas ntawm delta, muaj peb theem thiab tsis muaj nruab nrab. Ib qho kev sib txuas delta tuaj yeem muab 3-theem thauj khoom nkaus xwb. Cov kab hluav taws xob (VL) yog sib npaug rau cov khoom siv hluav taws xob. Phase current (IAB = IBC = ICA) is equal to Line current (IA = IB = IC) faib √3 (1.73). Thaum lub transformer theem nrab txuas mus rau qhov loj, tsis sib npaug load, lub delta thawj muab ib tug zoo dua tam sim no tshuav nyiaj li cas rau lub input fais fab mov.
WYE CONNECTION
Hauv kev sib txuas wye, muaj 3-theem thiab nruab nrab (N) - plaub nyob ntawm tag nrho. Cov zis ntawm wye kev twb kev txuas ua rau lub transformer muab ib tug 3-theem voltage (phase-rau-theem), nrog rau ib tug voltage rau ib theem loads, uas yog lub voltage ntawm ib theem thiab nruab nrab. Lub ntsiab lus nruab nrab kuj tseem tuaj yeem ua rau muaj kev nyab xeeb ntxiv thaum xav tau: VL-L = √3 x VL-N.
DELTA / WYE (D / Y)
D/y Zoo
Thawj qhov delta thiab theem nrab wye (D / y) kev teeb tsa sawv tawm rau nws lub peev xwm los xa peb lub xov tooj sib npaug rau cov khoom siv hluav taws xob tsim hluav taws xob, ua kom haum rau ntau yam kev siv seamlessly. Qhov kev teeb tsa no feem ntau xaiv los muab lub zog rau kev lag luam, kev lag luam, thiab cov chaw nyob hauv siab.
Qhov kev teeb tsa no muaj peev xwm muab tau ob qho tib si 3-theem thiab ib-theem thauj khoom thiab tuaj yeem tsim kom muaj cov khoom tso tawm nruab nrab thaum lub hauv paus tsis muaj. Nws zoo suppresses suab nrov (harmonics) los ntawm kab mus rau theem nrab.
D/y Disdvantages
Yog tias ib qho ntawm peb lub coils ua yuam kev lossis tsis ua haujlwm, nws tuaj yeem ua rau tag nrho pab pawg ua haujlwm, thiab 30-degree theem hloov ntawm thawj thiab theem nrab windings yuav ua rau muaj ntau dua ripple hauv DC circuits.
Post lub sij hawm: Aug-20-2024