Txoj kev suav ntawm cov ntsuas tam sim no ntawmlub cev muaj zog
Ua ntej, lub tsev kawm ntawv kev kawm: xam cov mis.
1. Kev suav cov mis rau cov ntsuas tam sim no ntawm peb-theem lub cev muaj zog:
P=1.732 × U × I × cosφ
(power factor: resistive load {{0}}, inductive load ≈ nruab nrab ntawm 0.7 thiab 0.85, P=zog: W)
2. Kev suav cov mis rau cov ntsuas tam sim no ntawm ib-theem lub cev muaj zog:
P=U × I × cosφ
Kev xaiv ntawm kev tiv thaiv huab cua hloov yuav tsum raug xaiv raws li qhov kev thauj khoom tam sim no. Feem ntau hais lus, lub peev xwm ntawm kev tiv thaiv huab cua hloov yog 20 ~ 30% loj dua qhov thauj khoom tam sim no.
3, cov qauv kev suav dav dav.
P=1.732 × IU × fais fab mov × efficiency (peb theem)
Ib theem tsis sib npaug 1.732 (hauv paus tooj 3)
Qhov kev xaiv ntawm kev tiv thaiv cua hloov feem ntau yog 1.2-1.5 npaug ntawm qhov ntsuas tam sim no.
Qhov thib ob, qhov kev paub ntawm pawg neeg: tus qauv empirical.
1. Cov mis empirical yog cais los ntawm voltage:
380V voltage, 2A ib kW.
660V voltage, 1.2A ib kW.
3000V voltage, 4kW 1A.
6000V voltage, 8 kW 1A.
2. Cov mis empirical yog cais los ntawm lub hwj chim:
Tshaj 3KW, tam sim no=2* fais fab tuag;
3KW thiab qis dua tam sim no=2.5 * lub zog.
Nkag siab txog txoj kev suav ntawm cov ntsuas tam sim no ntawm lub cev muaj zog, peb txheeb xyuas thiab suav los ntawm kev piv txwv: qhov ntsuas tam sim no ntawm peb-theem lub cev muaj zog 15KW.
1. Cov mis empirical xam qhov tam sim no I: 15 × 2=30 tam sim no.
2, lub tsev kawm ntawv cov mis laij lej: P=1.732 × IU × fais fab xwm txheej × efficiency (lub hwj chim factor thiab efficiency yog npaum li 0.9), U=380, P {{6 } }, hloov mus rau hauv cov qauv tuaj yeem suav tam sim no I=28.1 tam sim no.
Thib peb, lub tswv yim ntawm kev ntsuas tam sim no. Www.dgzj.com
1. Rau AC peb-theem plaub-xaim fais fab mov, kab hluav taws xob yog 380, theem voltage yog 220, thiab kab voltage yog lub hauv paus 3-theem voltage.
2. Rau lub cev muaj zog, qhov voltage ntawm ib qho winding yog theem voltage. Qhov hluav taws xob ntawm cov hlau yog cov kab hluav taws xob (xws li qhov hluav taws xob ntawm theem A thiab theem C, theem C, qhov tam sim no ntawm ib qho winding yog theem tam sim no, thiab tam sim no ntawm cov hlau yog cov kab tam sim no.
3. Thaum lub cev muaj zog txuas nrog lub hnub qub: kab tam sim no=theem tam sim no; kab voltage=hauv paus tooj 3 theem voltage. Cov tails ntawm peb lub windings txuas nrog thiab lub peev xwm yog xoom, yog li qhov voltage ntawm winding yog 220 volts.
4. Thaum lub cev muaj zog txuas ntawm lub ces kaum: kab tam sim no=hauv paus 3 theem tam sim no; kab voltage=theem voltage. Lub winding yog txuas ncaj qha mus rau 380, thiab tam sim no ntawm cov hlau yog cov vector sum ntawm peb winding tam sim no.
5, daim npav clamp ammeter yog ntsuas ntawm txhua kab ntawm A, B, C kab tam sim no.
