Kev piav qhia
1. Kev sib txuas hnub qub
Lub hnub qub kev sib txuas, tseem hu ua Y kev sib txuas.
(1) Txoj kev sib txuas
Txuas qhov kawg (lossis pib) ntawm peb lub windings ntawm peb lub -theem transformer ua ke los tsim ib qho nruab nrab point (N), thaum pib (los yog xaus) ntawm peb windings ua cov zis terminals.
Cov cim Circuit Court: Y
(2) Kev sib raug zoo ntawm voltage thiab tam sim no
Qhov no yog tus yam ntxwv tseem ceeb ntawm kev sib txuas hnub qub.
Kab Voltage vs. Theem Voltage:
Theem Voltage (U_Ph): Qhov voltage hla txhua theem winding, uas yog, qhov voltage ntawm cov hlau nyob (A, B, C) thiab nruab nrab point (N).
Kab Voltage (U_L): Qhov voltage ntawm ob lub xov hlau nyob (xws li A-B, B-C, C-A).
Kev sib raug zoo: Cov kab hluav taws xob yog √3 npaug ntawm theem hluav taws xob, thiab cov kab hluav taws xob ua rau cov kab hluav taws xob sib txuas los ntawm 30 degree.
Formula: U_L=√3 × U_Ph
Kab Current vs. Phase Current:
Hauv kev sib txuas hnub qub, tam sim no los ntawm txhua theem winding (theem tam sim no I_Ph) yog sib npaug rau tam sim no hauv kab (kab tam sim no I_L).
Kev sib raug zoo: I_L=I_Ph
(3) Cov yam ntxwv tseem ceeb
Qhov zoo:
Muab ob hom hluav taws xob: Vim muaj qhov nruab nrab ntawm qhov nruab nrab, ob qho tib si kab hluav taws xob (xws li, 400V) thiab theem voltage (xws li, 230V) tuaj yeem muab tau ib txhij. Qhov no yog lub hauv paus rau kev siv hluav taws xob hauv tsev thiab kev lag luam (380V / 220V).
Lub ntsiab lus nruab nrab tuaj yeem ua rau hauv av: Cov ntsiab lus nruab nrab tuaj yeem ncaj qha hauv av los yog hauv av los ntawm arc suppression coil, uas yuav pab txo qis kev ua txhaum tam sim no thiab txhim kho kev nyab xeeb thiab ruaj ntseg.
Muaj peev xwm tiv taus cov loads tsis sib npaug: Nrog rau txoj kab nruab nrab, nws tuaj yeem ua qhov tsis sib npaug ntawm peb -theem loads zoo, vim tias cov kab nruab nrab tuaj yeem nqa tsis sib npaug.
Qhov tsis zoo:
Qhov hluav taws xob los ntawm winding (theem voltage) kuj qis, yog li nyob rau hauv siab -voltage case, qhov yuav tsum tau rwb thaiv tsev rau lub winding yog qis dua qhov kev sib txuas ntawm delta ntawm tib theem voltage.
2. Kev sib txuas ntawm Delta
Delta kev sib txuas, tseem hu ua Δ txuas.
(1) Txoj kev sib txuas
Txuas peb windings ntawm peb -theem transformer kawg mus rau qhov kawg los ua ib daim duab peb sab kaw. Peb lub ntsiab lus txuas ua haujlwm raws li cov zis terminals.
Circuit Court cim: D los yog Δ
(2) Voltage thiab tam sim no kev sib raug zoo
Kab Voltage thiab Phase Voltage:
Hauv kev sib txuas delta, txhua qhov winding txuas ncaj qha ntawm ob kab.
Kev sib raug zoo: Kab voltage sib npaug theem voltage.
Formula: U_L=U_Ph
Kab Current thiab Phase Current:
Kab tam sim no (I_L) yog tam sim no ntws mus rau sab nraud load.
Phase tam sim no (I_Ph) yog qhov tam sim no ntws los ntawm txhua qhov winding.
Kev sib raug zoo: Kab tam sim no yog √3 zaug ntawm theem tam sim no thiab lags cov theem tam sim no los ntawm 30 degree.
Formula: I_L=√3 × I_Ph
(3) Cov yam ntxwv tseem ceeb
Qhov zoo:
- Tsis muaj qhov nruab nrab: Cov qauv yooj yim, tsuas yog peb cov kab tso zis, haum rau siab -voltage kis tau tus mob thiab lwm yam kev siv uas tsis xav tau qhov nruab nrab.
- Muaj peev xwm nqa tau peb qhov kev sib haum xeeb tam sim no: Hauv lub tshuab hloov pauv, qhov kev sib txuas ntawm delta tsim txoj hauv kev kaw rau qhov thib peb harmonic tam sim no, txhim kho qhov tso zis voltage waveform thiab tiv thaiv kev cuam tshuam. Qhov no tseem ceeb tshwj xeeb tshaj yog rau siab - fais fab transformers.
- Kev ntseeg siab dua: Yog tias ib theem winding tsis ua haujlwm, ob theem ntxiv tuaj yeem muab hluav taws xob txuas ntxiv hauv V txuas (hauv qee yam xwm txheej).
Qhov tsis zoo:
- Tsuas yog muab ib theem voltage xwb.
- Tsis tuaj yeem muab qhov nruab nrab hauv av ncaj qha, thiab muaj kev hloov pauv tsis zoo rau cov khoom tsis sib npaug.
- Windings yuav tsum tiv thaiv kab hluav taws xob, yog li qhov kev xav tau ntawm rwb thaiv tsev rau tib theem voltage siab dua hauv kev sib txuas hnub qub.
