nkhani

Common Mode Panopa: Zizindikiro ziwiri (kapena phokoso) zokhala ndi kukula komweko komanso kolowera pamizere yosiyana. Mu dera.Nthawi zambiri, phokoso lapansi nthawi zambiri limafalitsidwa ngati mawonekedwe amakono, choncho amatchedwanso phokoso wamba.

Pali njira zambiri zochepetsera phokoso lamtundu wamba. Kuphatikiza pa kuchepetsa phokoso lamtundu wamba kuchokera ku gwero, njira yomwe imagwiritsidwa ntchito kwambiri poletsa phokoso lamtundu wamba ndikugwiritsa ntchito ma inductors amtundu wamba kusefa phokoso lamtundu wamba, ndiko kuti, kuletsa phokoso lamtundu wamba pa chandamale. dera. . Ndiko kuti, wamba mode kutsamwitsa chipangizo chikugwirizana mu mndandanda mu mzere. Cholinga cha izi ndikuwonjezera kutsekeka kwa loop yamtundu wamba kuti mawonekedwe amtundu wamba atayike ndikutsekeka (kuwonetseredwa) ndi kutsamwa, potero kuletsa phokoso lamtundu wamba pamzere.

 
Mfundo za Common Mode Chokes kapena Inductors

Ngati ma coils omwe ali mbali imodzi amalangidwa pa mphete ya maginito yopangidwa ndi chinthu china cha maginito, pamene njira yosinthira ikudutsa, maginito amapangidwa muzitsulo chifukwa cha electromagnetic induction. Kwa ma siginecha osiyanitsira, maginito opangidwa ndi maginito amafanana kukula kwake ndipo amasiyana molunjika, ndipo amaletsana wina ndi mnzake, kotero kuti kusokoneza kosiyanasiyana kopangidwa ndi mphete ya maginito ndikochepa kwambiri; pamene kwa zizindikiro wamba mode, kukula ndi malangizo kwa kwaiye maginito fluxes ndi chimodzimodzi, ndipo awiri pamwamba pa wina ndi mzake. Mphete ya maginito ili ndi njira yayikulu yofananira. Izi zimapangitsa kuti makina ojambulira wamba asamakhudzire ma siginolo osiyanitsira ndipo amakhala ndi kusefa kwabwino kwa phokoso wamba.
(1) Njira yosiyanitsira pano imadutsa pa coil wamba, komwe mizere ya maginito imatsutsana, ndipo mphamvu ya maginito imafooka. Itha kuwoneka kuchokera kumayendedwe a mizere ya maginito mu chithunzi chotsatira - muvi wolimba ukuwonetsa komwe kuli komweko, ndipo mzere wamadontho ukuwonetsa momwe mphamvu yamaginito imayendera.

(2) Njira wamba yamakono imadutsa pa coil wamba, momwe mizere ya maginito imayendera mofanana, ndipo mphamvu ya maginito imalimbikitsidwa. Zitha kuwonedwa kuchokera kumayendedwe a maginito a maginito mu chithunzi chotsatira - muvi wolimba umasonyeza mayendedwe amakono, ndipo mzere wa madontho umasonyeza njira ya maginito.

The inductance of the common mode coil imadziwikanso kuti self-inductance coefficient. Tikudziwa kuti inductance ndi kuthekera kopanga maginito. Kwa coil wamba wamba kapena inductance wamba, pomwe njira yodziwika bwino imayenda kudzera pa koyilo, popeza mayendedwe a mizere ya maginito ndi ofanana, kutulutsa kotulutsa sikumaganiziridwa. Pankhani ya , kusinthasintha kwa maginito kumakhala pamwamba, ndipo mfundoyi ndi yofanana. Mizere ya maginito yopangidwa ndi koyilo yofiyira pachithunzi pansipa imadutsa pa koyilo ya buluu, ndipo mizere ya maginito yopangidwa ndi koyilo ya buluu imadutsanso pa koyilo yofiyira ndikukopana.

Kuchokera pakuwona kwa inductance, inductance imawirikizanso kawiri, ndipo kulumikizana kwa flux kumayimira maginito onse. Kwa ma inductors odziwika bwino, pamene maginito akuthamanga kawiri kawiri, chiwerengero cha kutembenuka sichisintha, ndipo panopa sichimasintha, ndiye zikutanthauza kuti Pamene inductance ikuwonjezeka ndi 2 nthawi, zikutanthauza kuti maginito omwe ali ofanana ndi maginito. kawiri.

Chifukwa chiyani mphamvu ya maginito yofananayo imawirikiza kawiri? Kuchokera ku inductance formula, popeza kuchuluka kwa matembenuzidwe a N sikusintha, maginito ozungulira ndi gawo la gawo lapakati pa maginito amatsimikiziridwa ndi kukula kwa maginito pachimake, kotero sichisintha, chokhacho. chinthu ndi maginito permeability. u ndi kawiri, kotero kuti maginito ochulukirapo amatha kupangidwa

Chifukwa chake, njira wamba ikadutsa, inductance wamba imagwira ntchito munjira yolumikizirana. Pansi pa zochita za inductance yofanana, inductance yofanana ikuwonjezeka ndi mtengo, kotero kuti inductance wamba wamba idzawirikiza kawiri, kotero imakhala ndi zotsatira zabwino pa chizindikiro chodziwika bwino. Zotsatira zosefera ndikuletsa chizindikiro chamtundu wamba ndi chopinga chachikulu ndikuletsa kuti zisadutse njira yolumikizira wamba, ndiko kuti, kuteteza chizindikirocho kuti chisapitirire ku gawo lotsatira la dera. Zotsatirazi ndizomwe zimapangidwira ZL zopangidwa ndi inductor.

Kuti mumvetsetse ma inductance of common mode inductors mu common mode mode, chothandizira chachikulu ndikumvetsetsa mutual inductance, zigawo zonse za maginito, ziribe kanthu kuti dzinalo ndi liti, bola mutagwira mawonekedwe a kusintha kwa maginito ndikuwona mawonekedwe a maginito. mphamvu ya maginito imasintha kupyolera mu zochitikazo, zidzakhala zosavuta kumvetsa, ndiyeno Tiyenera kumvetsetsa nthawi zonse maginito a maginito, omwe ndi mawonekedwe omveka a kumvetsetsa kwathu kwa maginito. Tangoganizani kuti mosasamala kanthu za lingaliro la dzina lomwelo kapena dzina losiyana kapena mutual inductance kapena zochitika za maginito, nthawi zonse timajambula mzere wa maginito kuti tidziwe iwo - dziwani "maginito ndodo" yomwe tafotokoza kale. Njira yopumira."