Ukadaulo Ndi Ubwino wa Inductor Yogwirizana - gawo 2

Mphamvu YopangidwaOyambitsa, pamodzi ndi deta yaposachedwa yaukadaulo wamakampani ndi mfundo zowongolera khalidwe, bukuli likufotokoza zambiri kuyambira mfundo zoyambira, njira zogwirira ntchito mpaka kusankha zenizeni ndi kupewa misampha, kupanga zisankho zabwino pakupanga magetsi. Tiyeni tipitirize kukambirana kuchokera m'nkhani yapitayi (nthawi yomaliza tidakambirana mafunso 6)

7. Kodi "kulephera kupirira kupanikizika" n'chiyani? (Vuto lalikulu pakusankha!)

Ili ndi "dzenje lobisika" lomwe silingalandiridwe mosavuta. Pali gawo loteteza pakati pa chitsulo cha ufa mkati mwa chowumbidwacho.chowongolera.
* Vuto: Mu malo ogwirira ntchito okhala ndi mphamvu zambiri komanso ma frequency ambiri kwa nthawi yayitali, ngati mphamvu yotetezera kutentha si yokwanira, gawo lotetezera kutentha pakati pa chitsulo cha ufa likhoza kubowoledwa.
* Zotsatira zake: Ndi zofanana ndi kulumikiza resistor motsatizana kudutsachowongolera, zomwe zimapangitsa kuti pakhale kutayika kwakukulu kwa makoma a mtima, kutentha kwambiri, komanso ngakhale kupsa ndi chips.
*Pewani misampha: Mu ntchito zomwe magetsi olowera amapitilira 50V, nthawi zonse tsimikizirani kuchuluka kwa magetsi achowongolerandi wopanga, osati phindu la inductance lokha.

8. Kodi Isat ndi Irms ndi chiyani? Ndi iti yomwe iyenera kuganiziridwa posankha?

Izi ndi magawo awiri ofunikira amakono:
* Isat (Kukhutitsidwa kwa Mphamvu): Mphamvu yamagetsi pamene inductance imatsika kufika pamlingo winawake (monga 30%). Kupitirira mtengo uwu kumayambitsa kuchepa kwadzidzidzi kwa mphamvu yosungira mphamvu ya inductor, zomwe zingayambitse kusakhazikika kwa kayendedwe ka mphamvu.
* Irms (RMS current): Mphamvu yamagetsi yomwe kutentha kwa pamwamba pa inductor kumafika pamtengo wodziwika (monga, 40°C), makamaka kumadalira kutaya kwa mkuwa (DCR).
* Mfundo: Posankha, magawo onse awiri ayenera kukwaniritsa zofunikira za dera.

9. Kodi kukana kwa DCR (DC resistance) kotsika nthawi zonse kumakhala bwino?

Inde. DCR ikatsika, kutayika kwa mkuwa kumakhala kochepa, mphamvu yosinthira mphamvu imakwera, ndipo kutentha kumakwera pang'ono. Komabe, pa voliyumu yomweyi, kutsatira DCR yotsika kwambiri nthawi zambiri kumatanthauza kuchepa kwa inductance, komwe kumafuna kusinthana kutengera momwe ntchitoyo imagwiritsidwira ntchito (kaya kuyika patsogolo mphamvu yogwira ntchito kwambiri kapena kusungira mphamvu zambiri).

10. Momwe mungaweruzire khalidwe lachowongolera ?

Chigamulo choyambirira chingapangidwe kudzera m'mfundo zotsatirazi:
*Mawonekedwe: Pamwamba pake payenera kukhala pathyathyathya komanso posalala, popanda mabala kapena ming'alu, ndipo chophimba cha pini chiyenera kukhala chowala.
*Kulimba kwa pini: Ma terminal ogulitsidwa ayenera kukhala olimba komanso osasweka mosavuta.
*Kukana kwa solder: Pambuyo pokonzanso solder, thupi siliyenera kukhala ndi mtundu kapena ming'alu yoonekeratu.

11. Chifukwa chiyani chingagwiritsidwe ntchitooyambitsakuchepetsedwa ndi kuonda?

A: Chifukwa cha ukadaulo wa zitsulo za ufa, sizifuna mipata yosungira maginito monga ma inductors achikhalidwe, ndipo kapangidwe kake ndi kakang'ono kwambiri. Pakadali pano, ukadaulowu ukhoza kupanga zinthu zoonda kwambiri zokhala ndi makulidwe osakwana 0.5mm, zomwe ndizoyenera kwambiri mafoni am'manja ndi zida zovalidwa.

12. Kodi njira ya “T-Core” ndi yotani?

Uwu ndi ukadaulo wapamwamba kwambiri womwe umakonza kugawa kwa maginito kudzera mu nkhungu zapadera ndi njira zozungulira, zomwe zimachepetsanso kutayika ndikukweza magwiridwe antchito apamwamba komanso kugwiritsa ntchito bwino kutentha.

13. Kodi inductor yolumikizidwa idzachita dzimbiri?

Zipangizo zopangira zambiri zimakhala ufa wachitsulo. Ngati chophimba choteteza kutentha (monga epoxy resin) pamwamba pa chinthucho chapoperedwa mosagwirizana kapena kuwonongeka, pali chiopsezo cha okosijeni ndi dzimbiri m'malo okhala ndi chinyezi chambiri komanso malo opopera mchere. Ukadaulo wapamwamba wopopera wokha ungathe kuletsa vutoli.