Hoʻohana pinepine ʻia nā choke maʻamau , i ʻike ʻia ma ke ʻano he choke maʻamau, i nā mea hoʻololi i nā kamepiula uila e hoʻokahuli i nā hōʻailona hōʻeuʻeu maʻamau. I ka hoʻolālā ʻana o ka panela kaohi, aia pū ka hana o ka ʻōwili choke maʻamau i ka kānana EMI, hiki pale i ka nalu electromagnetic i hoʻokumu ʻia e ka laina wikiwiki wikiwiki mai ka hoʻouna ʻana i ka mea radioactive i waho.
No ke aha e kūpale ai nā ʻāpana maʻamau EMI?
I mea e ʻike pono ai i kēia, he mea nui e hoʻomaka ʻoe e kālailai i ke kūkulu ʻia ʻana o nā choke maʻamau.
ʻO nā kānana haʻahaʻa haʻahaʻa no ka choke ʻano maʻamau o USB, ʻo La a me Lb nā ʻoka maʻamau maʻamau. ʻElua mau ʻōwili e ʻeha ʻia ma ka coil transformer like me ka helu like o nā huli a me nā kihi pae (huli o ka coil inductor). Pēlā, ke holo nā kahe maʻamau āpau i ke kaapuni ma waena o ka choke maʻamau, ʻo ia mau kahawai e hana i nā māla ʻume i nā ʻaoʻao ʻē aʻe i ka coil inductor e loaʻa ana ka pae like o ka Angle a me ka pale ʻana i kekahi i kekahi. I kēia manawa, ʻeha nā kūpili hōʻailona data maʻamau i nā mea pale coil (a me kahi liʻiliʻi. o ka haʻalulu weluwelu ma muli o ke ʻano o ka hele wāwae); Ke kahe ka mode maʻamau i loko o ka pahu, no ka mea aia ke ʻano maʻamau i ke ala like, e hana ka wili i kahi māla magnet i hoʻokahi ala, a me ka reactance inductive o ka wili. e hoʻonui, e hana ana i ka wili e like me ke ʻano impedance kiʻekiʻe, no laila e hopena ai i ka hopena o ka hopena weliweli.
No laila, e hoʻonui ʻia ke au o ka mode exponential e ke koina e hoʻokō i ka pahuhopu o ka kānana. ʻO ka ʻoiaʻiʻo, inā pili kekahi hopena o kēia kānana haʻahaʻa i ka hōʻailona hōʻailona a pili kekahi hopena i ka hāmeʻa i hoʻopilikia ʻia. a me ka mīkini, La a me C1, Lb a me C2 e hoʻopuka i ʻelua mau kānana o nā haʻahaʻa-pass i hiki ke hoʻohana i nā hōʻailona interrupence electromagnetic maʻamau i ke ala i nā hōʻailona hoʻokaʻawale haʻahaʻa loa.
ʻAʻole hiki i ke kaapuni ke kāohi wale i ka lawe ʻana o ka hōʻailona hoʻokomo uila electromagnetic o waho, akā hoʻoliʻiliʻi hoʻi i ka hōʻailona hoʻokomo uila electromagnetic i hoʻokumu ʻia e ka laina exponential ponoʻī i ka hana o ka coefficient, no laila e hoʻoliʻiliʻi pono ana i ka hōʻeha o ka hōʻailona hoʻoweliweli i ka ikaika ikaika.
I kēia manawa, loaʻa i kahi ʻoihana ke ʻano choke cooke coil i hana ʻia e ka ʻoihana i nā keu o ke kaohi pinepine ʻana a me nā hana pale, ke ʻano choke ʻano maʻamau, ka coefficient o ka lawe ʻana i nā hōʻailona maikaʻi, ka liʻiliʻi liʻiliʻi, maʻalahi e hoʻohana, kūpaʻa maikaʻi, maʻalahi e hoʻohana a kiʻekiʻe kiʻekiʻe. . Hoʻohana nui ʻia i nā pono kaulike kaulike kaulike, mea hoʻololi uila pinepine, mea hoʻololi impedance ʻano, mea hoʻololi kaulike a me nā mea kaulike ʻole, etc.
Aia kekahi usb me ka ferrite core-mode choke coil / EMI kānana inductance, he nui nā moʻo wili, maikaʻi kani kaohi a me ka pale ʻana i nā hana, kiʻekiʻe maʻamau a me ka haʻaheo leo a me ka haahaa o ke ʻano o ka leo o ka leo, e kaohi i ka hōʻailona hoʻohaʻahaʻa haʻahaʻa ʻano hōʻailona hōʻailona walaʻau, hōʻailona hōʻailona wikiwiki wikiwiki ʻole deformation, liʻiliʻi liʻiliʻi, kūpaʻa maikaʻi, maʻalahi o ka hoʻohana, nā maikaʻi o ke kūlana kiʻekiʻe.
ʻO nā kaula uila USB no nā kamepiula pilikino a me nā peripherals, ʻo nā kaula IEEE1394 no nā pahu hoʻonohonoho kiʻekiʻe o DVC a me nā TV, a me nā hōʻailona leo no nā paneli hana LCD a me nā uila i lalo.
ʻO ia ka hoʻokomo o ka filter pass low for choke mode maʻamau. Lana ka manaʻo makemake ʻoe! ʻO mākou ka mea hana hoʻokomo , inā pono ʻoe e kūʻai a hoʻopilikino paha, ʻoluʻolu e kūkākūkā ~
Ka manawa Post: Nov-02-2020