Momwe mungachepetse kutayika kwa inductor core | KHALANI BWINO

Tikudziwa kuti inductance core ndi chinthu chomwe chidzagwiritsidwa ntchito pazinthu zambiri zamagetsi, zamagetsi zimatulutsa kutayika kwina pakagwiritsidwe ntchito, ndipo kutengako core ndizosiyana. Ngati kutayika kwa core inductor ndikwambiri, kumakhudza moyo wautumiki wa core inductor.

Makhalidwe a inductor core loss (makamaka kuphatikizapo kutayika kwa hysteresis ndi kutayika kwa eddy panopa) ndi chimodzi mwa zizindikiro zofunika kwambiri za zipangizo zamagetsi, zomwe zimakhudza komanso zimatsimikizira momwe ntchito ikuyendera, kukwera kwa kutentha ndi kudalirika kwa makina onse.

Kutayika kwakukulu kwa Inductor

1. Hysteresis imfa

Chinthu chachikulu chikakhala ndi maginito, pali mbali ziwiri za mphamvu zomwe zimatumizidwa ku magnetic field, imodzi yomwe imasandulika kukhala mphamvu zomwe zingatheke, ndiye kuti, pamene mphamvu yamagetsi yakunja imachotsedwa, mphamvu ya maginito imatha kubwezeredwa ku dera. , pamene mbali ina imadyedwa ndi kugonjetsa kukangana, komwe kumatchedwa hysteresis loss.

Dera la gawo la mthunzi wa curve ya magnetization likuyimira kutayika kwa mphamvu komwe kumachitika chifukwa cha hysteresis mu njira ya magnetization ya maginito pachimake pakugwira ntchito. Magawo omwe akukhudza malo otayikawo ndi kuchuluka kwamphamvu kwa maginito B, kuchulukira kwambiri kwa maginito H, remanence Br ndi mphamvu yokakamiza Hc, momwe mphamvu ya maginito ndi mphamvu zamaginito zimatengera momwe magetsi amagwirira ntchito komanso core size parameters, pamene Br ndi Hc zimadalira katundu wakuthupi. Pa nthawi iliyonse ya magnetization ya pachimake inductor, m'pofunika kutaya mphamvu molingana ndi dera lazunguliridwa ndi hysteresis loop. kumtunda kwafupipafupi kumakhala, kutayika kwakukulu kwa mphamvu, kukulirakulira kwa kugwedezeka kwa maginito, kukulirakulira kwa malo otsekedwa ndi, kutayika kwakukulu kwa hysteresis.

2. Eddy panopa imfa

Mphamvu yamagetsi ya AC ikawonjezedwa ku koyilo ya maginito, mphamvu yapano imayenda kudzera pa koyiloyo, ndipo mphamvu yonse ya maginito yopangidwa ndi kutembenuka kosangalatsa kwa ampere imadutsa pakati pa maginito. Maginito pachimake pachokha ndi kondakitala, ndipo kusinthasintha konse kwa maginito kuzungulira gawo lamtanda la maginito pachimake kumalumikizidwa kuti apange koyilo yachiwiri yokhota imodzi. Chifukwa resistivity wa zinthu maginito pachimake si wopanda malire, pali kukana kwina kuzungulira pachimake, ndi voteji kuchititsa umatulutsa panopa, ndiye eddy current, amene amayenda kukana uku, kuchititsa kutayika, ndiko kuti, eddy panopa imfa.

3. Kutayika kotsalira

Kutayika kotsalirako kumachitika chifukwa cha magnetization relaxation effect kapena magnetic hysteresis effect. Zomwe zimatchedwa kupumula zimatanthauza kuti panthawi ya magnetization kapena anti-magnetization, dziko la magnetization silimasintha nthawi yomweyo ku chikhalidwe chake chomaliza ndi kusintha kwa mphamvu ya magnetization, koma kumafuna ndondomeko, ndipo "nthawi yotsatila" ndi chifukwa cha kutayika kotsalira. Imakhala makamaka pama frequency apamwamba a 1MHz pamwamba pa kutayika kwa kupumula ndikuzungulira maginito maginito ndi zina zotero, posinthira magetsi mazana a KHz amagetsi amagetsi, gawo la kutayika kotsalira ndilotsika kwambiri, limatha kunyalanyazidwa.

Posankha maginito oyenerera, ma curve osiyanasiyana ndi mawonekedwe afupipafupi ayenera kuganiziridwa, chifukwa ma curve amatsimikizira kutayika kwafupipafupi, kupindika kwa machulukidwe ndi inductance ya inductor. Chifukwa mphamvu ya eddy kumbali imodzi imayambitsa kukana, imapangitsa kuti maginito atenthedwe, ndipo imapangitsa kuti chisangalalo chiwonjezeke, kumbali ina imachepetsa mphamvu ya maginito ya maginito. Chifukwa chake, yesani kusankha zida zamaginito zokhala ndi resistivity yayikulu kapena mawonekedwe amizere yopindika kuti muchepetse kutayika kwapano kwa eddy. Choncho, zinthu zatsopano za platinamu NPH-L ndizoyenera kutayika kochepa kwazitsulo zazitsulo zamtundu wapamwamba komanso zida zamphamvu kwambiri.

Kutayika kwapakati kumachitika chifukwa cha kusintha kwa maginito muzinthu zapakati. Kutayika komwe kumachitika chifukwa cha zinthu zina ndi ntchito ya mafupipafupi ogwiritsira ntchito komanso kugwedezeka kwathunthu, motero kuchepetsa kutayika kwa conduction. Kutayika kwakukulu kumayambitsidwa ndi hysteresis, eddy current ndi kutayika kotsalira kwa zinthu zapakati. Chifukwa chake, kutayika kwakukulu ndi kuchuluka kwa kutayika kwa hysteresis, kutayika kwa eddy pano komanso kutayika kwa remanence. Kutayika kwa hysteresis ndiko kutayika kwa mphamvu chifukwa cha hysteresis, yomwe ili yofanana ndi malo ozunguliridwa ndi malupu a hysteresis. Mphamvu ya maginito ikadutsa pachimake ikusintha, eddy current imachitika pachimake, ndipo kutayika komwe kumachitika chifukwa cha eddy current kumatchedwa eddy current loss. Kutayika kotsalira ndikutayika konse kupatula kutayika kwa hysteresis ndi kutayika kwa eddy pano.