Mākēneki Neodymium Cylinder 6*13mm – Loaʻa ka laʻana manuahi | Fullzen

Ke helu nei i ke kahua magnetic (
$�$

B) a puni kahi magnet cylindrical hiki ke paʻakikī loa, ma muli o ka hoʻolaha magnetization i loko o ka cylinder. Maanei, e wehewehe wau i kahi hihia maʻalahi kahi i loaʻa ai iā mākou kahi cylinder magnetized like me kona axis magnetization i hoʻonohonoho ʻia me ke axis o ka cylinder. Ua kapa pinepine ʻia kēia he "cylinder magnetized longitudinally."

ʻO ke kahua makeneka (
$�$

B) ma waho o kahi cylinder magnetized like ma kona axis waena hiki ke hoʻokokoke ʻia me ka hoʻohana ʻana i ke ʻano no ke kahua i loko o kahi solenoid. Manaʻo kēia hoʻokokoke ʻana ua ʻoi aku ka lōʻihi o ka cylinder ma mua o kona anawaena. ʻO ke ʻano penei:

$�=�\cdot �$

B=μ⋅M

Ma hea:

• 
  $�$

  ʻO B ka ikaika o ke kahua magnetic ma kahi kiko ma waho o ka cylinder (ma teslas, T).

• 
  $�$

  ʻO μ ka permeability o ka mea (he mau, pinepine
  $�0$

  μ0​ no ka vacuum a i ʻole ka ea, like me
  $4�\times 10-7$

  4π×10−7 T m/A).

• 
  $�$

  ʻO M ka magnetization o ka cylinder (moment magnetic no kēlā me kēia anakahi leo, ma A/m).

No kahi cylinder magnetized like,
$�$

Hiki ke helu ʻia ʻo M penei:

$�=�huina�paukūʻono$

M=Vcylinder​Mhuina​​

Ma hea:

• 
  $huina$

  ʻO ka huina ka manawa magnetic holoʻokoʻa o ka cylinder (ma A m²).

• 
  $�paukūʻono$

  ʻO V ka nui o ka cylinder (ma m³).

E hoʻomanaʻo he hiʻohiʻona maʻalahi kēia a ʻaʻole paha e hōʻike pololei i ka hoʻolaha ʻana o ke kahua magnetic i nā hihia paʻakikī. Inā ʻaʻole like ka magnetization, a inā ʻaʻole ʻoi aku ka nui o nā ana o ka cylinder ma mua o kona anawaena, e lilo nā helu ʻana i mea paʻakikī a pono paha nā ʻano hana helu a loiloi paha.

No nā hopena pololei aʻe, pono paha ʻoe e hoʻohana i nā ʻano holomua e like me nā simulations helu me ka hoʻohana ʻana i ka finite element analysis a i ʻole nā ​​​​​​ʻano hana analytical e noʻonoʻo ana i nā waiwai magnetic o ka mea a me ka hoʻolaha magnetization maoli i loko o ka cylinder.

ʻO ka ʻōlelo ʻana he ʻole ke kahua magnetic i loko o kahi cylinder he kuhihewa paha ia a he hoʻomaʻalahi nui paha. Ma keʻano laulā, ʻaʻole ʻole ke kahua magnetic i loko o kahi cylinder i hoʻopili like ʻia. Eia nō naʻe, ma muli o nā kūlana kikoʻī a me nā kuhi, aia kekahi mau hihia kahi e hiki ai i ke kahua magnetic i loko o kahi cylinder ke nāwaliwali iki a hōʻike paha i kekahi mau waiwai e hōʻike ai he mea liʻiliʻi ke kahua.

Eia kekahi mau hiʻohiʻona e alakaʻi paha i ka manaʻo he ʻole ke kahua magnetic i loko o kahi cylinder:

1. Pale ʻana
2. Magnetization like

He mea nui e hoʻomaopopo ʻia e hilinaʻi ke kahua magnetic i loko o kahi magnet cylindrical i nā kumu like ʻole, me ka hoʻolaha magnetization, ke ʻano o ka magnet, nā waiwai o nā mea, a me nā mana o waho e like me nā kahua magnetic kokoke a i ʻole ka pale ʻana. Ma ke ʻano laulā, hiki ke helu ʻia a hoʻohālike ʻia ka ikaika o ke kahua magnetic ma muli o kēia mau kumu, akā ʻaʻole paha e like ke kahua me ka ʻole o loko o kahi cylinder magnetized like.

ʻAe, hiki ke loaʻa kahi kahua magnetic i loko o kahi cylinder hakahaka, inā loaʻa i ka cylinder kekahi ʻano magnetization. ʻO ke alo a me nā ʻano o ke kahua magnetic i loko o ka cylinder hakahaka e pili ana i nā mea e like me ke ʻano magnetization, nā waiwai mea, a me ke ʻano o ka cylinder.

ʻO ke kahua magnetic i loko a ma waho o kahi magnet cylindrical e pili ana i nā kumu like ʻole, me ke ʻano magnetization, nā waiwai o nā mea, a me ke ʻano o ka cylinder. E noʻonoʻo kākou i kekahi mau hiʻohiʻona:

1. Paukū Magnetized like ʻia
2. Paukū Magnetized Radial
3. Paukū Hollow i Wehe ʻia ka Magnetic
4. Paukū Pale Magnetic

He mau wehewehe maʻalahi kēia, a hiki ke paʻakikī loa ke ʻano maoli o ke kahua magnetic ma muli o nā kūlana kikoʻī a me nā kuhi. I ka hana maoli, ua kālailai pinepine ʻia ka hoʻolaha ʻana o ke kahua magnetic me ka hoʻohana ʻana i nā kumu hoʻohālike makemakika a i ʻole nā ​​polokalamu simulation e noʻonoʻo ana i nā ʻano kikoʻī o ka magnet a me kona kaiapuni.