nkhani

Mizere ya maginito opangidwa ndi koyilo sangathe kudutsa pa koyilo yachiwiri, chifukwa chake inductance yomwe imatulutsa mphamvu ya maginito yotchedwa leakage inductance. Amatanthauza mbali ya maginito flux yomwe imatayika panthawi yogwirizanitsa ma transformers oyambirira ndi apamwamba.
Tanthauzo la inductance leakage, zomwe zimayambitsa kutayikira, kuvulaza kwa leakge inductance, zifukwa zingapo zomwe zimakhudza kutayikira, njira zazikulu zochepetsera kutulutsa, kuyeza kwa inductance, kusiyana pakati pa kutayikira kwa leakage ndi kutuluka kwa maginito.
Tanthauzo la Leakage Inductance
The leakage inductance ndi gawo la maginito flux yomwe imatayika panthawi yolumikizana ya pulayimale ndi yachiwiri ya mota. The kutayikira inductance wa thiransifoma kuyenera kukhala kuti mizere maginito mphamvu opangidwa ndi koyilo sangathe kudutsa koyilo yachiwiri, kotero inductance kuti kutulutsa maginito kutayikira amatchedwa leakage inductance.
Chifukwa cha leakage inductance
Kutulutsa kotayikira kumachitika chifukwa zina zoyambira (zachiwiri) sizimalumikizidwa ndi zachiwiri (zoyambira) kudzera pachimake, koma zimabwerera ku pulayimale (yachiwiri) kudzera kutsekeka kwa mpweya. Mayendedwe a waya ndi pafupifupi nthawi 109 kuposa mpweya, pamene permeability wa ferrite core chuma ntchito thiransifoma ndi pafupifupi 104 nthawi mpweya. Chifukwa chake, maginito akamadutsa maginito opangidwa ndi phata la ferrite, gawo lina limadumphira mumlengalenga, ndikupanga kutsekedwa kwa maginito mumlengalenga, zomwe zimapangitsa kutayikira kwa maginito. Ndipo kuchuluka kwa magwiridwe antchito kumachulukirachulukira, kuthekera kwazinthu zapakati pa ferrite kumachepa. Chifukwa chake, pama frequency apamwamba, chodabwitsa ichi chimawonekera kwambiri.
Kuopsa kwa kutayikira inductance
Kutulutsa kotayirira ndi chizindikiro chofunikira chosinthira ma transfoma, chomwe chimakhudza kwambiri mawonekedwe amagetsi osinthira magetsi. Kukhalapo kwa inductance kutayikira kudzatulutsa mphamvu yakumbuyo yamagetsi pomwe chipangizo chosinthira chazimitsidwa, chomwe ndi chosavuta kuyambitsa kuwonongeka kwa chipangizo chosinthira; inductance yotayikira imathanso kukhala yokhudzana ndi The kugawidwa kwapang'onopang'ono kozungulira komanso mphamvu yogawidwa ya koyilo ya thiransifoma imapanga gawo la oscillation, lomwe limapangitsa kuti dera likhale lozungulira komanso kutulutsa mphamvu zamagetsi kunja, zomwe zimapangitsa kusokoneza kwamagetsi.
Zinthu zingapo zomwe zimakhudza kutayikira kwa inductance
Kwa transformer yokhazikika yomwe yapangidwa kale, inductance yowonongeka ikugwirizana ndi zinthu zotsatirazi: K: coefficient coefficient, yomwe imagwirizana ndi inductance leakage. Kwa ma windings osavuta a pulayimale ndi achiwiri, tengani 3. Ngati mapiringidzo achiwiri ndi mapiringidzo oyambirira akuvulazidwa mosinthana Kenako, tengani 0,85, chifukwa chake njira yokhotakhota ya masangweji ikulimbikitsidwa, kutulutsa kwamadzi kumatsika kwambiri, mwina osachepera 1/3 ya choyambirira. Lmt: Kutalika kwapakati pa kutembenuka kulikonse kwa chigoba chonsecho pa chigoba Choncho, opanga thiransifoma amakonda kusankha pachimake chokhala ndi phata lalitali. Kutalikirana kwa mapiringiro, kumachepetsa kutulutsa kwamadzi. Ndizopindulitsa kwambiri kuchepetsa kutayikira kwa inductance mwa kuwongolera kuchuluka kwa kutembenuka kwa mafunde kukhala ochepa. Mphamvu ya inductance ndi ubale wa quadratic. Nx: kuchuluka kwa matembenuzidwe okhotakhota W: m'lifupi mwake Mapiritsi Matalala: makulidwe a zotchingira zopindika bW: makulidwe a mapindikidwe onse a thiransifoma yomalizidwa. Komabe, njira yokhotakhota masangweji imabweretsa zovuta kuti mphamvu ya parasitic imachulukira, magwiridwe antchito amachepetsedwa. Ma capacitances awa amayamba chifukwa cha kuthekera kosiyanasiyana kwa ma koyilo oyandikana ndi mafunde ogwirizana. Kusinthako kukasinthidwa, mphamvu yosungidwa momwemo idzatulutsidwa ngati mawonekedwe a spikes.
Njira yayikulu yochepetsera kutayikira kwa inductance
Zozungulira zozungulira 1. Gulu lililonse la ma windings liyenera kuvulazidwa mwamphamvu, ndipo liyenera kugawidwa mofanana. 2. Mizere yotsogolera iyenera kukonzedwa bwino, yesetsani kupanga ngodya yoyenera, ndi pafupi ndi khoma la chigoba 3. Ngati wosanjikiza umodzi sungathe kuvulazidwa, wosanjikiza umodzi uyenera kukhala wochepa pang'ono. 4 Wosanjikiza wotchingira uyenera kuchepetsedwa kuti akwaniritse zofunikira zamagetsi ndipo ngati pali malo ochulukirapo, lingalirani za chigoba chotalikirana ndikuchepetsa makulidwe ake. Ngati ndi coil yamitundu yambiri, mapu ogawa maginito a zigawo zambiri za ma coil angapangidwe mofanana. Kuti muchepetse inductance, zonse zoyambirira ndi zachiwiri zitha kugawidwa. Mwachitsanzo, imagawidwa m'magulu a pulayimale 1/3 → sekondale 1/2 → pulayimale 1/3 → sekondale 1/2 → pulayimale 1/3 → sekondale 2/3 → pulayimale 2/3 → sekondale 1/ 3 etc., mphamvu yayikulu ya maginito imachepetsedwa kukhala 1/9. Komabe, mazenera amagawidwa kwambiri, njira yokhotakhota imakhala yovuta, chiŵerengero chapakati pakati pa ma coils chikuwonjezeka, kudzaza kumachepetsedwa, ndipo kuletsa pakati pa pulayimale ndi yachiwiri ndi kovuta. Pankhani yomwe ma voltages otulutsa ndi olowera ndi otsika, inductance yotayikira imayenera kukhala yaying'ono kwambiri. Mwachitsanzo, thiransifoma yoyendetsa imatha kuvulazidwa ndi mawaya awiri ofanana. Pa nthawi yomweyo, maginito pachimake ndi lalikulu zenera m'lifupi ndi kutalika ntchito, monga mphika mtundu, RM mtundu, ndi PM chitsulo. Oxygen ndi maginito, kotero kuti mphamvu ya maginito pawindo ndi yotsika kwambiri, ndipo inductance yaing'ono yotuluka imatha kupezeka.
Kuyeza kwa leakage inductance
Njira wamba yoyezera kutayikira kwa kutayikira ndiyo kufupikitsa mapindikidwe achiwiri (oyambirira), kuyeza mapindikidwe a mapindikidwe a pulayimale (yachiwiri), ndipo zotsatira zake zimakhala zoyambira (zachiwiri) mpaka zachiwiri (zoyambira) zotayikira. A zabwino thiransifoma kutayikira inductance sayenera upambana 2 ~ 4% yake magnetizing inductance. Poyesa kutayikira kwa thiransifoma, khalidwe la transformer likhoza kuweruzidwa. The leakage inductance imakhudza kwambiri dera pama frequency apamwamba. Pamene akumangirira transformer, inductance yotayikira iyenera kuchepetsedwa momwe mungathere. Zambiri mwazomangamanga za "sangweji" za pulayimale (yachiwiri) -sekondale (zoyambirira) -zoyambira (zachiwiri) zimagwiritsidwa ntchito poyendetsa thiransifoma. kuchepetsa kutayikira inductance.
Kusiyana pakati pa leakage inductance ndi maginito flux leakage
The leakge inductance ndi kulumikizana pakati pa pulayimale ndi yachiwiri pakakhala mapindikidwe awiri kapena kupitilira apo, ndipo gawo lina la maginito flux silinaphatikizidwe kwathunthu ku sekondale. Chigawo cha inductance yotayikira ndi H, yomwe imapangidwa ndi kutuluka kwa maginito kuchokera ku pulayimale kupita ku sekondale. Kuchucha kwa maginito kumatha kukhala kokhotakhota kumodzi kapena kozungulira kangapo, ndipo gawo lina la kutayikira kwa maginito silimalowera komwe kumayendera maginito. Chigawo cha kutayikira kwa maginito ndi Wb. Kutayikira kwamadzi kumachitika chifukwa cha kutayikira kwa maginito, koma kutayikira kwa maginito sikutulutsa kutulutsa.