izindaba

I-inductor yemodi evamilekusho ukuthi amakhoyili amabili alinyazwa kumongo wensimbi ofanayo, anamawindi aphikisanayo, inani lamajika kanye nesigaba esifanayo. Okuvame ukusetshenziswa ekushintsheni okuphakelayo kwamandla ukuze kuhlungwe amasiginali wokuphazamiseka kagesi wemodi evamile, izihlungi ze-EMI zisetshenziselwa ukucindezela amagagasi kagesi akhiqizwe imigqa yesiginali enesivinini esikhulu ukuthi aphume ngaphandle. I-inductance yemodi evamile kokokufaka kwemojuli yamandla ngokuvamile ukunciphisa imisebe kanye nomsindo wemodi evamile yefrikhwensi ephezulu. Kodwa-ke, i-inductance enkulu yemodi evamile inomphumela omuhle wokucindezela ekuphazamisekeni kwe-low-frequency, futhi imvamisa ephezulu ingase ibe yimbi kakhulu, kodwa umuzwa omncane unomphumela omubi wokucindezela ekuphazamisekeni kwe-low-frequency.

Inomphumela wokucindezela osobala kumsindo wemodi evamile. Isimiso sokusebenza siwukuthi lapho imodi evamile yamanje idlula engxenyeni, ama-inductance ama-inductors amabili ayagqagqana. Kodwa ngomsindo wemodi yokuhlukanisa, ama-inductance amabili alingana nokuthatha umehluko, inani le-inductance liyehla, futhi umphumela wokucindezela uzoba buthaka.

Usayizi we-inductance yemodi evamile uzothinta ngqo ukusebenza kwe-EMC. Umsebenzi oyinhloko ukuhlukanisa isignali yemodi evamile futhi unciphise ukuphazamiseka kwemodi evamile yangaphandle, ngaleyo ndlela kuncishiswe umthelela ekunikezeni amandla. Ingase futhi yehlise isignali yemodi evamile yangaphakathi futhi inciphise umthelela kugridi yamandla. Kodwa-ke, i-inductance enkulu yemodi evamile inomphumela omuhle wokucindezela ekuphazamisekeni kwe-low-frequency, futhi imvamisa ephezulu ingase ibe yimbi kakhulu, kodwa umuzwa omncane unomphumela omubi wokucindezela ekuphazamisekeni kwe-low-frequency.

Esivame ukukusebenzisa ekugcineni kwemojula yamandla umthamo ongu-x, umthamo y kanye nemodi evamile yokungena. Umthamo une-impedance ephansi esignali, esebenza njengesignali yokudlula nokuhlanganisa. I-inductance ingukuthikamezeka okuphezulu kusiginali futhi idlala indima ekuboniseni nasekumunceni amasiginali wokuphazamiseka wemvamisa ephezulu.

Ukuphazamiseka phakathi kwezintambo ezimbili zamandla phansi kubizwa ngokuthi i- common mode interference , kanti ukuphazamiseka phakathi kwezintambo ezimbili zamandla kubizwa ngokuthi i-different mode interference. Uma i-inductance kanye ne-capacitance kuhlanganiswa kusihlungi, umphumela wokuhlunga ungcono, kanye nebhendi yokuvama lapho i-inductance kanye ne-capacitance idlala indima. Futhi okuhlukile. I-Y capacitor kanye ne-Y capacitor zidlala indima ekuhlungeni ukuphazamiseka kwemodi evamile, futhi i-X capacitor isebenza ngokuyinhloko njengesignali yesifunda esifushane, inciphisa indlela lapho isignali yemodi yokuhlukanisa igeleza, ngaleyo ndlela inciphisa ukuzulazula okubangelwa imingcele ye-parasitic umjikelezo futhi kubangele ukukhishwa kwe-high-frequency.

Lapho i-inductance noma i-capacitance isuswa ekwakhiweni, ingxenye esele isazosebenza, kodwa umphumela uzoba mubi kakhulu. Ngokuvamile, ukukhushulwa kwemodi evamile, kuba ngcono. Lapho ukhetha i-inductor yemodi evamile, ukukhetha kusekelwe ikakhulukazi kwijika lemvamisa ye-impedance. Ngesikhathi esifanayo, ukunakwa kufanele kukhokhwe ethonyeni le-impedance yemodi yokuhlukanisa esignali.