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Kev Sib Piv Txog Kev Siv Tshuab: Transformer Rho Tawm vs. Transformer Ib Txwm
2025-08-26
- Lub Hom Phiaj Tseem Ceeb
Cov Transformers Ib Txwm
Tsim los rau kev hloov pauv hluav taws xob (nce/qis), nrog rau qhov sib piv tsis sib xws ntawm cov xov hluav taws xob thawj zaug/theem ob. Lawv lub hom phiaj tseem ceeb yog kev hloov pauv hluav taws xob AC kom ua tau raws li qhov yuav tsum tau ua.
Ua tib zoo saib xyuas kev rho tawm hluav taws xob (galvanic isolation) es tsis yog kev hloov kho hluav taws xob. Txawm hais tias qee cov qauv tswj hwm 1: 1 qhov tig piv, lawv lub luag haujlwm tseem ceeb yog rhuav tshem cov kev hluav taws xob ncaj qha ntawm qhov chaw thiab lub nra kom ntseeg tau tias muaj kev nyab xeeb.
- Kev Tsim Qauv Lub Tswv Yim
Cov Transformers Ib Txwm
Tsim los ntawm kev sib txuas sib nqus uas ua rau muaj kev hloov pauv hluav taws xob. Autotransformers (ib hom me me) sib koom cov windings rau kev tsim qauv me me tab sis tsis muaj peev xwm cais tawm.
Cov Transformers Isolated
Muaj qhov tshwj xeeb kev rho tawm ob txoj hlua khi nrog kev tiv thaiv hluav taws xob. Cov qauv siab heev suav nrog Faraday cages los tswj cov suab nrov hom thiab cov transients.
- Cov Lus Qhia Txog Kev Nyab Xeeb
| Cov Qauv | Transformer Ib Txwm | Kev rho tawm Transformer |
| Lub zog dielectric | 1,000V (ib txwm) | ≥1,500V (IEC 61558-1 ua raws li) |
| Tam sim no xau | Txog li 3.5mA |
|
| Kev Teeb Tsa Av | Nruab nrab av | Kev ua av ntab los yog kev ua av xaiv |
- Cov xwm txheej ntawm daim ntawv thov
Cov Transformers Ib Txwm
Cov txheej txheem tswj kev lag luam
Lub hom phiaj dav dav Kev Faib Fais Fab (piv txwv li, 380V → 220V hloov pauv)
Cov ntawv thov uas tsis tas yuav siv nyiaj ntau thiab tsis tas yuav tsum muaj kev nyab xeeb ntau
Cov Transformers Isolated
Cov khoom siv thaij duab kho mob (MRI/CT scanners)
Cov cuab yeej siv hauv chaw kuaj mob thiab cov tshuab suab/yeeb yaj kiab
Cov khoom siv hluav taws xob rov ua dua tshiab (cov inverters hnub ci)
- Kev Siv Txuj Ci
Cov kev xyaum ua cov xov hlau
Ib txwm: Kev sib txuas ncaj qha theem-nruab nrab
Kev Rho Tawm: Cov kab PE/N tshwj xeeb nrog kev saib xyuas rwb thaiv tsev
Kev ua tau zoo ntawm EMI
Ib txwm: Raug rau lub suab nrov (50/60Hz harmonics)
Kev rho tawm: > 60dB hom kev tsis lees paub hom (CMRR)
- Cov Qauv Kev Ua Raws Cai
Ib txwm: IEC 60726-2 (kev siv rau kev lag luam)
Kev rho tawm: IEC 61558-1/2 (cov txheej txheem kev nyab xeeb tseem ceeb), UL 1950 (cov khoom siv kho mob)
Qhov kev sib piv uas muaj cov qauv no qhia tau tias cov transformers cais tawm muab cov txiaj ntsig tseem ceeb rau kev nyab xeeb los ntawm kev rwb thaiv tsev thiab kev siv tshuab txo suab nrov, thaum cov transformers ib txwm muab qhov tseem ceeb rau kev hloov pauv hluav taws xob uas pheej yig. Kev xaiv nyob ntawm cov kev cai tshwj xeeb ntawm kev nyab xeeb hluav taws xob thiab ib puag ncig ua haujlwm.