nkhani

Kwambiri

Zambiri mwazinthu zapakati pa maginito zimakhala ndi ma conductor osauka a flux ndipo zimakhala zotsika pang'ono, pomwe zida zosagwiritsa ntchito monga mpweya, mkuwa, ndi mapepala zimakhala ndi dongosolo lofanana la kukula kwa permeability. Zida zina, monga chitsulo, faifi tambala, cobalt ndi ma aloyi awo, zimakhala ndi permeability kwambiri.

Pofuna kukonza maginito a coil ya air-core, maginito amachokera, monga momwe tawonetsera pa Chithunzi 1.2. Ubwino wa kuyambitsa maginito pachimake ndi kuti kuwonjezera permeability ake mkulu, maginito njira kutalika (MPL-maginito njira kutalika) n'zomveka pang'ono. Kupatula pomwe Z ili pafupi ndi koyilo, maginito flux amangokhala pachimake.

Maginito asanayambe kudzazidwa ndi gawo lina la koyiloyo kubwerera kumalo opanda phokoso, pali malo odulirapo momwe maginito amawonekera mu data ya maginito.

Magnetomotive mphamvu, mphamvu ya maginito ndi magnetoresistance

MMF ndi mphamvu ya maginito H ndi mfundo ziwiri zofunika pa maginito. Iwo ali ndi ubale woyambitsa: MMF=NI, N ndi chiwerengero cha kutembenuka kwa koyilo, ndipo ine ndi panopa.

Magnetic field intensity H, yomwe imatanthauzidwa ngati mphamvu ya maginito pa kutalika kwa unit: H = MMF / MPL

Kuchulukira kwa maginito B, komwe kumatanthauzidwa ngati kuchuluka kwa mizere yamaginito pagawo lililonse: B = φ/Ae

Kuthamanga kopangidwa ndi MMF mu deta yoperekedwa kumadalira kukana kwa deta kuti isinthe. Kukana uku kumatchedwa magnetoresistance Rm

Ubale pakati pa MMF, maginito flux ndi maginito kukana ndi ofanana ndi ubale pakati pa electromotive mphamvu, panopa ndi kukana.

Kusiyana kwa mpweya

Pamene maginito njira kutalika MPL ndi pachimake mtanda gawo Ae apatsidwa, maginito pachimake wopangidwa ndi mkulu permeability deta ndi otsika maginito kukana. Ngati maginito ozungulira ali ndi mpweya, mphamvu yake ya maginito imakhala yosiyana ndi ya maginito opangidwa ndi deta yochepa ya resistivity (monga chitsulo). Pafupifupi kukayikira konse kwa njira iyi kudzakhala mumpata wa mpweya, chifukwa kusafuna kwa mpweya kumakhala kwakukulu kwambiri kuposa deta ya maginito. Muzochita zenizeni, kukana kwa maginito kumayendetsedwa ndikuwongolera kukula kwa kusiyana kwa mpweya.

Zofanana permeability

Kukanika kwa mpweya ndi Rg, kutalika kwa kusiyana kwa mpweya ndi LG, ndipo kukana kwathunthu ndi Rmt.

Takulandilani kukaonana ndi BIG pakuyitanitsa maginito. Tili ndi akatswiri ogwira ntchito kuti akupatseni ntchito zambiri.