nūhou

Core

ʻO ka hapa nui o nā mea koʻikoʻi magnetic he mau alakaʻi maikaʻi ʻole o ka flux a he haʻahaʻa haʻahaʻa, ʻoiai ʻo nā mea non-conductive e like me ka ea, keleawe, a me ka pepa ke ʻano like o ka nui o ka permeability.ʻO kekahi mau mea, e like me ka hao, ka nickel, ka cobalt a me kā lākou mau alloys, he kiʻekiʻe ka permeability.

No ka hoʻomaikaʻi ʻana i nā waiwai magnetic o ka coil air-core, ua hoʻokomo ʻia kahi kumu magnetic, e like me ka hōʻike ʻana ma ke Kiʻi 1.2.ʻO ka pōmaikaʻi o ka hoʻokomo ʻana i kahi kumu magnetic ʻo ia ka mea ma kahi o kona permeability kiʻekiʻe, ʻo ka lōʻihi o ke ala magnetic (MPL-magnetic ala lōʻihi) akaka ma ka nānā.Koe wale no kahi kokoke o Z i ka coil, ua paa loa ka flux magnetic i ke kumu.

Ma mua o ka hoʻopiha ʻia ʻana o ke kumu magnetic a hoʻi ka ʻāpana o ka coil i ke kūlana hollow, aia kahi ʻoki ʻoki no ka nui o ka flux magnetic hiki ke ʻike ʻia i ka ʻikepili magnetic.

ʻO ka ikaika magnetomotive, ka ikaika a me ka magnetoresistance

ʻO ka MMF a me ka ikaika kahua magnetic H ʻelua mau manaʻo nui i ka magnetism.He pilina kumu ko lākou: MMF=NI, N ka helu o ka huli ʻana o ka pōʻai, a ʻo I ke au.

ʻO ka ikaika mākēneki H, i wehewehe ʻia e like me ka ikaika makeke no ka lōʻihi: H= MMF /MPL

Mākēneki flux density B, i wehewehe ʻia e like me ka helu o nā laina mākia ma kēlā me kēia ʻāpana: B = φ/Ae

ʻO ka flux i hana ʻia e MMF i kahi ʻikepili i hāʻawi ʻia ma muli o ke kūʻē ʻana o ka ʻikepili i ka flux.Kapa ʻia kēia kūʻē ʻana i ka magnetoresistance Rm

ʻO ka pilina ma waena o MMF, magnetic flux a me magnetic resistance e like me ka pilina ma waena o ka ikaika electromotive, ka manawa a me ke kū'ē.

ʻAha ea

Ke hāʻawi ʻia ka lōʻihi o ke ala magnetic MPL a me ka ʻāpana ʻāpana koʻikoʻi Ae, ʻo ke kumu magnetic i haku ʻia me ka ʻikepili permeability kiʻekiʻe he haʻahaʻa haʻahaʻa.Inā loaʻa i ke kaapuni mākēne kekahi āwaha ea, ʻokoʻa kona kūʻē ʻana mai ke kumu magnetic i hana ʻia me ka ʻikepili resistivity haʻahaʻa (e like me ka hao).Aneane e pau ana ka makemake ole o keia ala i ka ea, no ka mea, ua oi aku ka makemake ole o ka ea ma mua o ka ikepili magnetic.Ma nā hoʻohana pono, hoʻomalu ʻia ke kūpaʻa magnetic ma ka hoʻomalu ʻana i ka nui o ka ea.

ʻO ke kūlike like

ʻO ka makemake ʻole o ka ea he Rg, ʻo LG ka lōʻihi o ka ea, a ʻo ka nui o ka makemake ʻole he Rmt.

Welina mai e kamaʻilio me BIG no ke kauoha kumu magnetic.Loaʻa iā mākou nā limahana lawelawe ʻoihana e hāʻawi iā ʻoe i nā lawelawe kikoʻī.