Yuav ua li cas xam cov Transformer Turns Ratio rau Kev Siv Hluav Taws Xob

Lub transformer lem ratio yog ib qho tseem ceeb parameter siv los txiav txim qhov voltage kev sib raug zoo ntawm thawj thiab theem nrab windings. Rau kev siv fais fab mov, txawm li cas los xij, xam qhov tseeb lem piv yuav tsum tau ntau tshaj qhov tsuas yog faib cov input voltage los ntawm cov zis voltage.

Nyob rau hauv ib tug pa transformer, qhov voltage ratio yog ncaj qha mus rau lub winding lem ratio. Hauv kev hloov hluav taws xob, qhov kawg transformer tsim kuj yog nyob ntawm lub converter topology, hloov zaus, lub voj voog ua haujlwm, waveform, rectification method, magnetic core, thiab kev khiav hauj lwm voltage ntau.

Rau cov engineers thiab OEM buyers ua hauj lwm nrog ib tug high zaus transformer los yog switching fais fab mov transformer, kev nkag siab txog cov kev sib raug zoo no yuav ua rau transformer xaiv thiab kev cai tsim ntau npaum li cas.

1. Dab tsi yog Transformer Turns Ratio?

Lub transformer lem piv piav qhia txog kev sib raug zoo ntawm tus naj npawb ntawm lem ntawm thawj winding thiab tus naj npawb ntawm lem ntawm lub thib ob winding.

Rau qhov zoo tagnrho transformer:

Vp / Vs=Np / Ns

Qhov twg:

Vp=Thawj qhov hluav taws xob

Vs=Secondary voltage

Np=Thawj zaug

Ns=Qhov thib ob hloov

Piv txwv li, yog tias thawj qhov hluav taws xob yog 400 V thiab qhov xav tau theem nrab voltage yog 40 V:

400 / 40 = 10

Lub hauv paus tseem ceeb - rau - theem nrab hloov pauv yog li no:

Np : Ns=10 : 1

Qhov kev suav no muab cov kev sib raug zoo ntawm qhov voltage. Nws tsis, los ntawm nws tus kheej, txiav txim siab qhov kawg winding tsim ntawm lub tswv yim fais fab mov transformer.

2. Yuav ua li cas xam qhov Basic Turns Ratio

Qhov kev suav yooj yim tshaj plaws yog ua raws li lub hauv paus thiab theem nrab voltage.

Hloov qhov sib piv=Thawj Voltage / Secondary Voltage

Piv txwv li, xav txog ib tug transformer nrog:

Thawj qhov hluav taws xob: 240V

Secondary voltage: 24V

Qhov yooj yim lem ratio yog:

240 / 24 = 10

Yog li ntawd:

Np : Ns=10 : 1

Yog hais tias thawj winding muaj 200 lem, theoretical secondary winding yuav muaj:

200 / 10=20 tig

Qhov no yog tsim nyog raws li ib tug zoo tagnrho transformer xam.

Rau qhov tseeb transformer, cov chaw tsim khoom yuav tsum ntsuas qhov kev poob, kev ua haujlwm, kev sib nqus flux, winding tam sim no, thiab cov khoom siv hluav taws xob tshwj xeeb.

3. Thawj-rau- Cov Kev Hloov Pauv Thib Ob hauv Kev Hloov Cov Khoom Siv Hluav Taws Xob

Lub tshuab hluav taws xob hloov hluav taws xob hloov pauv ua haujlwm txawv ntawm cov khoom siv hluav taws xob sib txawv - zaus transformer.

Lub transformer feem ntau yog tsav los ntawm ib tug switched waveform generated los ntawm ib tug semiconductor switching circuit. Qhov voltage thov rau thawj winding yog li nyob ntawm lub hwj chim mov topology thiab hloov tej yam kev mob.

Common topologies muaj xws li:

Flyback

Tom ntej

Push-rub

Ib nrab- choj

Tag nrho - choj

Vim hais tias cov topologies hloov lub zog sib txawv, kev sib raug zoo ntawm input voltage, tso zis voltage, lub voj voog lub luag haujlwm, thiab hloov pauv hloov pauv kuj txawv.

Qhov no yog vim li cas qhov kev suav hauv qab no:

Input Voltage / Tso zis Voltage

yuav tsum tau kho raws li qhov pib taw tes es tsis yog qhov kawg tsim kab zauv rau txhua qhov hloov hluav taws xob.

4. Vim li cas lub luag hauj lwm Cycle cuam tshuam rau kev sib piv

Hauv ntau cov khoom siv hluav taws xob PWM, cov zis hluav taws xob yog tswj los ntawm kev hloov lub luag haujlwm.

Lub voj voog ua haujlwm sawv cev rau feem pua ​​​​ntawm txhua lub sijhawm hloov pauv thaum lub sijhawm hloov pauv siv lub zog rau lub tshuab hloov pauv.

Rau qhov yooj yim converter kev sib raug zoo, qhov tso zis voltage yuav muaj feem xyuam rau lub input voltage, lub luag hauj lwm voj voog, thiab lem ratio.

Kev sib raug zoo ntawm tus neeg sawv cev tuaj yeem qhia tau tias:

Vout ≈ Vin × D × (Ns / Np)

Qhov twg:

Vout=Tso zis voltage

Vin=Kev hloov pauv cuam tshuam - theem input voltage

D=Lub voj voog ua haujlwm

Ns/Np=Secondary -rau -Primary turns ratio

Qhov sib npaug tiag tiag nyob ntawm lub converter topology thiab circuit configuration.

Vim li no, cov chaw tsim khoom siv hluav taws xob yuav tsum paub txog cov khoom siv hluav taws xob topology ua ntej txiav txim siab qhov sib piv zaum kawg.

5. Cov khoom siv hluav taws xob ntau yuav tsum tau txiav txim siab

Tsuas yog siv cov nominal input voltage tuaj yeem ua rau qhov tsis tsim nyog transformer tsim.

Piv txwv li, lub zog hloov hluav taws xob tuaj yeem ua haujlwm los ntawm:

300-400V DC

es tsis yog ntawm ib qho hluav taws xob ruaj khov.

Lub transformer yuav tsum ua hauj lwm kom raug nyob rau hauv no ntau yam thaum tswj qhov yuav tsum tau tso zis voltage thiab tsis txhob sib nqus flux ntau dhau.

Thaum tsim ib qho kev cai transformer, muab:

Yam tsawg kawg nkaus input voltage

Nominal input voltage

Qhov siab tshaj plaws input voltage

Maximum lub luag haujlwm voj voog

Hloov zaus

Yuav tsum tau tso zis voltage

Cov zis tam sim no

Qhov kev hloov pauv yuav tsum raug ntsuas tawm tsam qhov ua tiav kev ua haujlwm ntau dua li ib tus nqi nominal.

6. Cov zis hluav taws xob tsis yog ib txwm sib npaug rau Transformer Secondary Voltage

Qhov no yog ib qho ntawm feem ntau yuam kev nyob rau hauv transformer lem ratio xam.

Piv txwv li, lub hwj huam mov yuav tsum tau tswj 12 V DC tso zis.

Nws tsis tas txhais tau hais tias qhov hloov pauv thib ob winding yuav tsum tsuas yog tsim rau 12 V.

Nruab nrab ntawm lub transformer thiab qhov kawg DC tso zis, Circuit Court tej zaum yuav muaj:

Rectifier diodes

Synchronous rectification

Cov zis inductors

Capacitors

Voltage tswj circuitry

PCB conductors

Cov khoom no cuam tshuam qhov tseeb voltage xa ​​mus rau lub load.

Lub transformer theem nrab voltage yog li yuav tsum tau txiav txim siab raws li tag nrho cov fais fab mov Circuit Court.

Rau cov kev cai siab zaus transformer, cov chaw tsim khoom yuav tsum tau txais qhov tseeb thib ob - sab yuav tsum tau es tsis yog qhov kawg DC tso zis voltage.

7. Voltage Drops cuam tshuam rau qhov ua tau zoo ntawm qhov sib piv

Ib qho zoo tagnrho transformer tsis muaj hluav taws xob poob. Lub transformer tiag tiag ua.

Voltage poob tuaj yeem tshwm sim los ntawm:

Thawj winding kuj

Secondary winding kuj

Rectifier voltage poob

Cov dej inductance

Hloov- cov khoom poob

PCB tsis kam

Lwm yam converter poob

Piv txwv li, yog tias qhov kawg tso zis yuav tsum nyob twj ywm ntawm 24 V nyob rau hauv load, lub transformer yuav tsum tau muab ib tug thib ob voltage uas compensates rau lub voltage losses nyob rau hauv tag nrho cov Circuit Court.

Tus nqi ntawm cov nyiaj them yog nyob ntawm lub hwj huam mov tsim thiab load tej yam kev mob.

Yog li ntawd, qhov sib piv tiag tiag yuav tsum tau tsim tom qab txiav txim siab txog txoj kev ua tiav hluav taws xob.

8. Hloov qhov sib piv thiab sib nqus Core tsim

Qhov sib piv piv txiav txim siab qhov kev sib raug zoo ntawm cov windings, tab sis tus naj npawb ntawm cov lem yuav tsum tau sib xws nrog cov tub ntxhais sib nqus.

Rau lub siab zaus transformer, thawj lem yog cuam tshuam los ntawm:

Applied voltage

Hloov zaus

Maximum lub luag haujlwm voj voog

Core hla - cheeb tsam

Cov khoom siv tseem ceeb

Maximum flux ceev

Hloov waveform

Ob peb thawj zaug tuaj yeem ua rau muaj qhov sib nqus sib nqus ntau dhau thiab muaj peev xwm tsav cov tub ntxhais mus rau saturation.

Kev hloov ntau dhau tuaj yeem ua rau ntev winding, tooj liab poob, to inductance, thiab transformer loj.

Yog li ntawd, transformer tsim yuav tsum muaj ob qho tib si:

Qhov tseeb lem ratio

thiab

Qhov tseeb tus naj npawb ntawm lem.

Cov no muaj feem cuam tshuam, tab sis lawv tsis yog tib tus qauv tsim.

9. Hloov qhov piv txwv kuj txiav txim siab txog kev sib raug zoo tam sim no

Lub transformer lem ratio yog hais txog tam sim no thiab voltage.

Rau qhov zoo tagnrho transformer:

Ip / Is=Ns / Np

Qhov twg:

Ip=Thawj qhov tam sim no

Yog=Secondary tam sim no

Np=Thawj zaug

Ns=Qhov thib ob hloov

Qhov no txhais tau hais tias thaum qhov hluav taws xob poob qis, qhov thib ob sab feem ntau nqa cov tam sim no siab dua rau tib lub zog hloov pauv.

Qhov no muaj qhov cuam tshuam ncaj qha rau ntawm lub tshuab hluav taws xob winding tsim.

Cov chaw tsim khoom yuav tsum xaiv qhov tsim nyog tus neeg xyuas pib qhov ntev thiab kev hloov kho winding raws li qhov tseeb tam sim no.

Rau siab -tam sim no theem nrab windings, tus tsim yuav xav tau:

Cov conductors loj dua

Ntau cov kab sib txuas

Tsim nyog winding txheej

Tshwj xeeb winding kev npaj

Yog li ntawd, kev hloov pauv yuav tsum tau txiav txim siab ua ke nrog lub zog thiab qhov xav tau tam sim no.

10. Piv txwv: xam qhov sib npaug ntawm cov khoom siv fais fab

Xav txog ib qho yooj yim switching fais fab mov nrog:

Cov tswv yim DC: 320V

Yuav tsum tau tso zis: 24 V

Hloov topology: ib nrab -bridge

Kwv yees lub luag haujlwm voj voog: 50%

Ib qho yooj yim voltage sib piv muab:

320 / 24 = 13.33

Txawm li cas los xij, nws yuav tsis raug qhia tam sim ntawd 13.33: 1 transformer piv yam tsis xav txog ib nrab - choj ua haujlwm.

Qhov hluav taws xob tau siv rau lub tshuab hloov pauv thawj zaug, lub voj voog lub luag haujlwm, txoj kev hloov kho, qhov poob qis, thiab kev tswj hwm ntau yam cuam tshuam rau qhov kawg tsim.

Yog li ntawd, cov chaw tsim khoom ntawm transformer yuav siv tag nrho cov khoom siv hluav taws xob los txiav txim siab:

Tsim nyog core

Thawj zaug

Thib ob

Hloov ratio

Hlau loj

Txoj kev kho cua

Rwb thaiv tsev qauv

Cia siab tias kub nce

Qhov no yog vim li cas kev cai transformer yuav tsum tau ua ua ke nrog rau qhov tseeb converter tsim.

11. Common Transformer Turns Ratio xam yuam kev

Qhov yuam kev 1: Siv qhov hluav taws xob input ÷ Cov zis hluav taws xob raws li qhov kawg ntawm qhov sib piv

Qhov no ua haujlwm raws li qhov pib zoo tshaj plaws tab sis tsis txaus rau ntau daim ntawv thov hloov hluav taws xob.

yuam kev 2: Tsis quav ntsej Converter Topology

Flyback, rau pem hauv ntej, ib nrab-bridge, thiab tag nrho-bridge converters muaj qhov sib txawv voltage thiab zog-hloov kev sib raug zoo.

yuam kev 3: Tsis quav ntsej lub luag haujlwm voj voog

PWM tswj tau hloov qhov zoo voltage thiab lub zog xa los ntawm transformer.

yuam kev 4: Tsis meej pem DC tso zis nrog Secondary Voltage

Qhov kawg tswj DC voltage yuav txawv ntawm qhov yuav tsum tau hloov hluav taws xob theem nrab voltage vim yog kev hloov kho thiab lwm yam kev poob qis.

Ua yuam kev 5: Xaiv qhov hloov pauv yam tsis tau kuaj xyuas Core Flux

A correct voltage ratio can still result in excessive flux density if the absolute number of primary turns is too low.

Qhov yuam kev 6: Tsis quav ntsej Winding tam sim no

Tus neeg xyuas pib winding yuav tsum muaj peev xwm tuav tau qhov tseeb RMS thiab qhov siab tshaj plaws tam sim no tsim los ntawm cov khoom siv hluav taws xob.

12. Cov ntaub ntawv dab tsi koj yuav tsum muab rau tus neeg tsim khoom hloov pauv kev cai?

Thaum thov kev hloov pauv hloov pauv rau lub zog hluav taws xob, muab cov ntaub ntawv ua tiav kev pabcuam pab cov neeg tsim khoom ntsuas tus qauv tsim kom raug.

Rau cov haujlwm OEM, cov kev txwv no muab cov chaw tsim khoom siv hluav taws xob ntau ntau cov ntaub ntawv txaus los ntsuas qhov sib nqus thiab winding tsim es tsis txhob cia siab rau qhov tsis tiav voltage specifications.

13. Thaum twg Koj Yuav Tsum Ua Haujlwm Nrog Transformer Chaw Tsim Tshuaj?

Tus qauv transformer yuav tsim nyog thaum qhov voltage, hwj chim, zaus, qhov ntev, thiab mounting yuav tsum tau ua raws li tus qauv uas twb muaj lawm.

Rau cov khoom siv OEM, txawm li cas los xij, lub tshuab hloov pauv yuav tsum tau kho kom haum ib puag ncig lub zog tiag tiag.

Ib qho kev cai transformer chaw tsim tshuaj paus tuaj yeem soj ntsuam:

Magnetic core xaiv

Thawj thiab theem nrab lem

Winding qauv

Hlau xaiv

Rwb thaiv tsev

Cov dej inductance

Kub nce

Mechanical qhov ntev

Kev tsim muaj peev xwm

Qhov no yog ib qho tseem ceeb tshwj xeeb tshaj yog thaum lub transformer yuav tsum haum rau ib tug PCB los yog ua hauj lwm nyob rau hauv ib tug txhais efficiency thiab kub ntau yam.

Xaus

Kev xam qhov hloov pauv hloov pauv pib nrog kev sib raug zoo ntawm thawj thiab theem nrab voltage:

Vp / Vs=Np / Ns

Tab sis qhov kev sib raug zoo zoo tshaj no tsuas yog qhov pib rau lub zog siv hluav taws xob hloov pauv.

For switching applications, the final design must also consider converter topology, duty cycle, input voltage range, rectification, voltage losses, switching frequency, magnetic core, flux density, winding current, and thermal conditions.

Rau ib tug high zaus transformer, qhov tseeb lem piv thiab tus naj npawb ntawm lem yuav tsum tau tsim ua ke. Kev tsim qauv tsim nyog yuav tsum muab qhov kev hloov pauv uas yuav tsum tau ua thaum ua kom sib nqus flux, winding losses, kub nce, thiab tag nrho qhov ntev ntawm daim ntawv thov.

Rau OEM thiab kev cai fais fab mov tej yaam num, muab tag nrho cov hluav taws xob thiab txhua yam specifications rau transformer chaw tsim tshuaj paus yog txoj kev ntseeg siab tshaj plaws los txiav txim qhov tsim nyog thawj thiab theem nrab winding tsim.

Ntsiab Cai

Thaum xam qhov hloov pauv hloov pauv, ib txwm xav txog:

• Thawj thiab theem nrab voltage
• Input voltage ntau
• Hloov topology
• Lub luag haujlwm voj voog
• Hloov zaus
• Rectification txoj kev
• Voltage poob thiab Circuit Court poob
• Magnetic core thiab flux ceev
• Thawj thiab theem nrab tam sim no
• Rwb thaiv tsev thiab thermal xav tau

Qhov kev hloov pauv tau tsim cov kev sib raug zoo ntawm qhov hluav taws xob, tab sis qhov kev tsim ntawm transformer tiav txiav txim siab seb cov khoom puas yuav ua tau zoo hauv cov khoom siv hluav taws xob.