Indlela yokusebenzisa indandatho kazibuthe | ULULAME

Iyiphi indlela yokusebenzisa indandatho kazibuthe ? Uyini umehluko phakathi kwezinto ezihlukile zendandatho kazibuthe ye-inductor? Ake sijwayelane ndawonye.

Indandatho kazibuthe iyingxenye evamise ukusetshenziswa emelene nokuphazamiseka kumasekhethi kagesi, enomthelela omuhle wokucindezela kumsindo wefrikhwensi ephezulu, okulingana nesihlungi se-low-pass. Ingakwazi ukuxazulula kangcono inkinga yokucindezelwa kokuphazanyiswa kwe-high-frequency yemigqa yamandla, imigqa yesignali nezixhumi, futhi inochungechunge lwezinzuzo, njengokuthi kulula ukuyisebenzisa, elula, ephumelelayo, isikhala esincane nokunye. Ukusebenzisa i-ferrite anti-interference core ukucindezela ukuphazanyiswa kuka-electromagnetic (EMI) kuyindlela eyongayo, elula nephumelelayo. Isetshenziswe kabanzi kumakhompiyutha nakweminye imishini ye-civil electronic.

I-Ferrite iwuhlobo lwe-ferrite olulungiswa ngokusebenzisa izinto ezisebenza kahle kazibuthe ukuze kungene i-magnesium eyodwa noma ngaphezulu, i-zinc, i-nickel nezinye izinsimbi ku-2000 ℃. Kubhendi yefrikhwensi ephansi, indikimba kazibuthe emelene nokuphazamiseka ibonisa i-impedance ephansi kakhulu futhi ayithinti ukudluliswa kwamasignali awusizo kulayini wedatha noma umugqa wesiginali. Ku-band frequency high, kusukela ku-10MHz, i-impedance iyanda, kodwa ingxenye ye-inductance ihlala incane kakhulu, kodwa ingxenye yokumelana ikhula ngokushesha. uma kukhona amandla ayimvamisa ephezulu adlula ezintweni kazibuthe, ingxenye yokumelana izoguqula la mandla iwasebenzise amandla ashisayo. Ngale ndlela, kwakhiwa isihlungi se-low-pass, esinganciphisa kakhulu isignali yomsindo we-high-frequency, kodwa ukuvimbela isignali ewusizo ye-low-frequency kungase kunganakwa futhi akuthinti ukusebenza okuvamile kwesifunda. .

Ungayisebenzisa kanjani indandatho kazibuthe ye-anti-interference inductance:

1. Yibeke ngqo endaweni yamandla noma inqwaba yemigqa yesignali. Ukuze ukwandise ukuphazamiseka nokumunca amandla, ungawuzungeza izikhathi eziningana ngokuphindaphindiwe.

2. Indandatho kazibuthe emelene ne-jamming enekliphu yokukhweza ifanele ukucindezelwa okulwa nokujama okunxeshezelwe.

3. Ingaboshelwa kalula entanjeni yamandla nakulayini wesignali.

4. Ukufakwa okuguquguqukayo nokusebenziseka kabusha.

5. Uhlobo lwekhadi oluzimele lulungisiwe, olungaphazamisi isithombe esiphelele semishini.

Umehluko phakathi kwezinto ezihlukene ze-Inductance Magnetic Ring

Umbala wendandatho kazibuthe ngokuvamile umnyama wemvelo, futhi ingaphezulu lendandatho kazibuthe linezinhlayiya ezinhle, ngoba eziningi zazo zisetshenziselwa ukuvimbela ukuphazamiseka, ngakho-ke azivamile ukupendwa ngokuluhlaza. Yiqiniso, ingxenye encane yayo iphinde isetshenziselwe ukwenza ama-inductors, futhi ifafazwe ngokuluhlaza ukuze kuzuzwe ukufakwa okungcono futhi kugweme ukulimaza ucingo olunamelled ngangokunokwenzeka. Umbala ngokwawo awuhlangene nokusebenza. Abasebenzisi abaningi bavame ukubuza, indlela yokuhlukanisa phakathi kwamasongo kazibuthe aphezulu kanye nezindandatho ezinozibuthe eziphansi? Ngokuvamile, indandatho kazibuthe enefrikhwensi ephansi iluhlaza futhi indandatho kazibuthe enemvamisa ephezulu ingokwemvelo.

Ngokuvamile kulindelekile ukuthi ukufinyeleleka kuka-μ I kanye nokumelana no-ρ kuphezulu, kuyilapho ukuphoqelelwa kwe-Hc nokulahlekelwa kwe-Pc kuphansi. Ngokusho kokusetshenziswa okuhlukile, kunezidingo ezihlukene zezinga lokushisa le-Curie, ukuzinza kwezinga lokushisa, i-coefficient yokunciphisa ukungakwazi ukungena kanye ne-coefficient ethile yokulahlekelwa.

Imiphumela eyinhloko imi kanje:

(1) Ama-Manganese-zinc ferrite ahlukaniswe abe ama-ferrite aphezulu angakwazi ukungena kanye nama-ferrite anemvamisa ephezulu yamandla aphansi (owaziwa nangokuthi ama-ferrite amandla). Isici esiyinhloko se-permeability ephezulu ye-mn-Zn ferrite yi-permeability ephezulu kakhulu.

Ngokuvamile, izinto ezino-μ I ≥ 5000 zibizwa ngokuthi izinto eziphezulu zokungena, futhi μ I ≥ 12000 ngokuvamile iyadingeka.

I-Mn-Zn high-frequency kanye ne-low-power ferrite, eyaziwa nangokuthi i-ferrite yamandla, isetshenziswa ezintweni ze-ferrite zamandla. izidingo zokusebenza yilezi: ukungeneka okuphezulu (ngokuvamile kudingekile μ I ≥ 2000), izinga lokushisa eliphezulu le-Curie, ukuminyana okuphezulu okubonakalayo, ukugcwala okuphezulu kokungeniswa kazibuthe kanye nokulahlekelwa nguzibuthe core kumaza aphansi.

(2) Izinto ze-Ni-Zn ferrite, ebangeni eliphansi le-frequency elingaphansi kwe-1MHz, ukusebenza kwe-NiZn ferrite akufani nokwesistimu ye-MnZn, kodwa ngaphezu kwe-1MHz, ngenxa ye-porosity yayo ephezulu kanye nokumelana okuphezulu, kungcono kakhulu Uhlelo lwe-MnZn luzoba into enhle enozibuthe ethambile ezinhlelweni ezisetshenziswayo. I-resistivity ρ iphakeme njengo-108 ω m futhi ukulahleka kwefrikhwensi ephezulu kuncane, ngakho ifaneleka ngokukhethekile imvamisa ephezulu engu-1MHz no-300MHz, futhi izinga lokushisa le-Curie lezinto ze-NiZn liphakeme kune-MnZn,Bs futhi lifika ku-0.5T 10A/ m HC ingaba mncane njengo-10A/m, ngakho ilungele zonke izinhlobo zama-inductors, ama-transformer, amakhoyili okuhlunga namakhoyili aminyanisayo. I-Ni-Zn high-frequency ferrite inomkhawulokudonsa obanzi kanye nokulahleka kokudlulisela okuphansi, ngakho-ke avame ukusetshenziswa njenge-electromagnetic interference (EMI) kanye ne-radio frequency interference (RFI) cores ukuze kuhlanganiswe i-high frequency electromagnetic interference (EMI) kanye namadivayisi wokukhweza phezulu. Amandla efrikhwensi ephezulu kanye nokulwa nokuphazamiseka. Ama-ferrite kagesi e-Ni-Zn angasetshenziswa njengamadivayisi e-broadband e-RF ukuze abone ukudluliswa kwamandla kanye nokuguqulwa kokuphazamiseka kwamasiginali e-RF kuyibhendi ebanzi, enomkhawulo ophansi wama-kilohertz amaningana kanye nomkhawulo wamafrikhwensi ongaphezulu wezinkulungwane zama-megahertz. Impahla ye-Ni-Zn ferrite esetshenziswe kusiguquli se-DC-DC ingakhuphula imvamisa yokushintshwa kwamandla kagesi futhi inciphise ivolumu nesisindo se-transformer kagesi.

Amasongo kazibuthe avamile-ngokuyisisekelo kunezinhlobo ezimbili zamasongo kazibuthe emugqeni wokuxhumana jikelele, enye iyindandatho kazibuthe ye-nickel-zinc ferrite, enye iyindandatho kazibuthe ye-manganese-zinc ferrite, idlala izindima ezihlukene.

Ama-ferrite e-Mn-Zn anezici zokungena okuphezulu nokuminyana okuphezulu kwe-flux, futhi anezimpawu zokulahlekelwa okuphansi lapho imvamisa ingaphansi kuka-1MHz.

Okungenhla ukwethulwa kwama-inductors kazibuthe, uma ufuna ukwazi okwengeziwe ngama-inductors, sicela ukhululeke ukuxhumana nathi.