nkhani

Chiyambi cha Transformer
Zogwiritsidwa ntchito makamaka pa: masiwichi apamwamba kwambiri a digito;Zida zotumizira za SDH/ATM;ISDN.ADSL.VDSL.POE Integrated service data zida;FILT kuwala CHIKWANGWANI kuzungulira zida;Kusintha kwa Ethernet, etc.!Mapampu a data ndi zida zomwe zimapezeka pamakhadi ochezera a PCI.Mapampu a data amadziwikanso kutima network thiransifomakapena ma network kudzipatula thiransifoma.Ili ndi ntchito zazikulu ziwiri pamanetiweki khadi, imodzi ndikutumiza deta, imagwiritsa ntchito njira yophatikizira koyilo kuti isefa chizindikiro cha PHY kuti iwonjezere chizindikirocho, ndikutembenuza kuphatikizikako kumagawo osiyanasiyana kudzera mugawo la maginito kulumikiza mbali ina ya chingwe cha netiweki;mmodzi ndi kuteteza maukonde chingwe kugwirizana Milingo osiyana pakati pa zipangizo zosiyanasiyana maukonde kuteteza voltages osiyana kuwononga zipangizo malinga ndi maukonde chingwe kufala.Kuphatikiza apo, mercury ya data imathanso kuchitapo kanthu pakuteteza mphezi pazida.
Mphamvu ya Transformer:
Mu zida za Efaneti, malinga ndi zida za Ethernet, PHY imalumikizidwa ndi mfundo ya RJ45, ndipo chosinthira cha network chidzawonjezeredwa pakati.Ma transfoma ena apakati amadutsa mpaka pansi.Ndipo mphamvu ikalumikizidwa, mphamvu yamagetsi imatha kukhala yosiyana, 3.3V, 2.5V, ndi 1.8V.
Ntchito ya Transformer:
1. Kudzipatula kwamagetsi
Mulingo wazizindikiro wopangidwa ndi chipangizo chilichonse cha CMOS nthawi zonse umakhala wokulirapo kuposa 0V (malingana ndi kupanga ndi kapangidwe ka chip), ndipo PHY idzakhala ndi kutayika kwakukulu kwa gawo la DC pomwe chizindikirocho chimatumizidwa kudera la 100 metres. kapena kuposa.Ngati chingwe chakunja cha netiweki chikugwirizana mwachindunji ndi chip, kulowetsa kwamagetsi (mphezi) ndi magetsi osasunthika kumatha kuwononga chip mosavuta.
Ndiye pali njira zosiyanasiyana zokhazikitsira zida.Magawo osiyanasiyana a gridi yamagetsi adzatsogolera kumagulu osagwirizana a 0V mbali zonse, ndipo chizindikirocho chimatumizidwa kuchokera ku A kupita ku AB.Chifukwa mlingo wa 0V wa chipangizo A ndi mlingo wa 0V wa mfundo B ndi wosiyana, ukhoza kuchititsa kuti magetsi ayambe kuyenda kuchokera ku mphamvu yamphamvu.Zida zimathamangira ku zida zokhala ndi mphamvu zochepa.
Transformer ya netiweki imagwiritsa ntchito koyilo yolumikizirana mosiyanasiyana kuti isefa chizindikiro chosiyanitsa cha PHY kuti chiwongolere chizindikirocho, ndikusintha kulumikizanako kumalekezero ena a chingwe cholumikizira netiweki kudzera pamaginito.Izi sizimangopangitsa kuti chingwe cha netiweki ndi PHY zisagwirizane ndi thupi pakati pawo, chizindikirocho chimasinthidwa ndikufalitsidwa, gawo la DC mu chizindikirocho limadulidwa, komanso deta ikhoza kufalitsidwa mu zipangizo zosiyanasiyana za 0V.
The network thiransifoma poyambirira idapangidwa kuti ipirire voteji ya 2KV ~ 3KV.Zimagwiranso ntchito ngati chitetezo cha mphezi.Zida za intaneti za abwenzi ena zimawotchedwa mosavuta ndi mabingu, ambiri mwa iwo ndi mabingu.Chifukwa cha mapangidwe osagwirizana ndi sayansi a PCB, ndipo mawonekedwe a zida zazikulu amawotchedwa, tchipisi tating'ono tawotchedwa, ndipo thiransifoma imagwira ntchito yoteteza.
Transformer yoteteza imatha kukwaniritsa zofunikira za IEEE802.3, koma sangathe kupondereza EMI.
2. Common mode kukanidwa
Waya uliwonse mu gulu lopotoka uyenera kukulungidwa mozungulira wina ndi mzake mu helix iwiri.Mphamvu ya maginito yomwe imapangidwa ndi mphamvu yomwe ikuyenda kudzera mu waya iliyonse imamangidwa ndi spiral.Mayendedwe apano akudutsa muwaya uliwonse wa awiri opotoka amatsimikizira kuchuluka kwa phokoso lotulutsidwa ndi waya uliwonse.Miyezo yopatsira yomwe imayambitsidwa ndi njira yosiyanitsira komanso mafunde wamba wa conductor aliyense ndi wosiyana.Kutumiza kwaphokoso komwe kumachitika chifukwa cha kusiyanasiyana kwapano ndikocheperako, ndipo phokoso limatsimikiziridwa makamaka ndi mawonekedwe wamba.
1. Chizindikiro chamitundu yosiyanasiyana muzopindika
Kwa ma siginecha osiyanitsira, mawaya ake amtundu uliwonse amayenda molunjika pa mawaya awiri.Ngati mawayawo atakulungidwa mofanana, mafunde otsutsanawa angapangitse kuti maginito azitha kusiyanitsa kukula kwake, kupangitsa kuti maginitowo agwirizane.
2. Common mode chizindikiro mu awiri opotoka
Common mode panopa ikuyenda mbali imodzi pa mawaya onse ndi kubwerera pansi kudzera parasitic capacitor Cp.Pankhaniyi, mafunde amatulutsa maginito maginito a kukula kwake ndi polarity, zomwe zimachokera sizingathe kutsutsana.Mafunde amtundu wamba amapanga maginito pamtunda wopotoka, womwe umagwira ntchito mofanana ndi mlongoti.
3. Common mode, kusiyana mode phokoso ndi EMC ake
Pali mitundu iwiri ya phokoso pazingwe: phokoso lotulutsa ndi phokoso lotumizira kuchokera ku mphamvu ndi zingwe zowonetsera.Magulu awiriwa amagawidwa kukhala phokoso wamba komanso phokoso lamitundu yosiyanasiyana.Phokoso lopatsirana mosiyanasiyana ndi phokoso lomwe limapangidwa ndi phokoso la phokoso mkati mwa chipangizo chamagetsi chomwe chimatsatira njira yofanana ndi chizindikiro chamakono kapena choperekera panopa, monga momwe tawonetsera pa Chithunzi 4. Njira yochepetsera phokosoli ndikuyika ma coils osiyanitsidwa mndandanda pa chingwe chamagetsi ndi chingwe chamagetsi.Sefa yotsika yotsika imakhala ndi capacitor kapena capacitor ndi inductor mofananira kuti muchepetse phokoso lambiri.
Mphamvu yamunda yomwe imapangidwa ndi phokosoli imagwirizana mosiyanasiyana ndi mtunda kuchokera pa chingwe kupita kumalo owonera, ogwirizana bwino ndi masikweya pafupipafupi, komanso okhudzana ndi zomwe zikuchitika komanso dera lomwe likuzungulira pano.Chifukwa chake, njira yochepetsera ma radiation iyi ndikuwonjezera fyuluta ya LC yotsika pang'ono pamakina azizindikiro kuti phokoso lapano lisalowe mu chingwe;zingwe zotchingidwa kapena zophwanyika ziyenera kugwiritsidwa ntchito kunyamula zobwerera zapano ndi ma sign apano kuti muchepetse malo ozungulira.
Common mode anachita phokoso kwaiye ndi phokoso panopa ikuyenda pakati pa nthaka ndi chingwe kudzera parasitic capacitance pakati pansi ndi zida, lotengeka ndi voteji phokoso mu zipangizo.
The njira kuchepetsa wamba mode kufala phokoso ndi kulumikiza wamba akafuna kutsamwitsa koyilo mu mndandanda mu mzere mphamvu kapena magetsi.Parallel capacitors.Pangani fyuluta ya LC yosefa kuti musefe phokoso lamtundu wamba.