ʻO Cylinder Neodymium Magnet 6 * 13mm - Loaʻa ka Laʻana manuahi | Fullzen

Ke helu ʻana i ke kahua magnetic (
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B) hiki ke paʻakikī a puni kahi magnet cylindrical, ma muli o ka hoʻoili magnetization i loko o ka cylinder. Maʻaneʻi, e hoʻopuka wau i kahi hihia maʻalahi kahi i loaʻa iā mākou ka cylinder magnetized uniformly me kona axis magnetization e pili ana me ke axis o ka cylinder. Ua kapa pinepine ʻia kēia ma ke ʻano he "longitudinally magnetized cylinder."

ʻO ke kahua magnetic (
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B) hiki ke hoʻohālikelike ʻia ma waho o kahi puʻupuʻu i hoʻohālikelike ʻia me kona koʻikoʻi waena me ka hoʻohana ʻana i ke ʻano no ke kahua i loko o kahi solenoid. Manaʻo kēia hoʻohālikelike ʻoi aku ka lōʻihi o ka cylinder ma mua o kona anawaena. ʻO ke kumu:

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B=μ⋅M

Ma hea:

• 
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  ʻO B ka ikaika mākia ma kahi kiko ma waho o ke kinikini (ma teslas, T).

• 
  $�$

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

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

  4π×10−7 T m/A).

• 
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  M ʻo ia ka magnetization o ka cylinder (magnetic moment per unit volume, in A/m).

No ka cylinder magneti like ʻole,
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M hiki ke helu 'ia penei:

$�=�puʻuʻu$

M=VcylinderMtotal​

Ma hea:

• 
  $�\; huina$

  ʻO Mtotal ka huina o ka manawa mākēneki o ka cylinder (ma A m²).

• 
  $�\; ʻōniʻoniʻo$

  ʻO Vcylinder ka leo o ka cylinder (ma m³).

E hoʻomanaʻo he hiʻohiʻona maʻalahi kēia a ʻaʻole paha e hōʻike pololei i ka hoʻoili 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, ʻoi aku ka paʻakikī o ka helu ʻana a makemake paha i nā ʻenehana helu a i ʻole analytical.

No nā hualoaʻa pololei, pono paha ʻoe e hoʻohana i nā ʻano holomua e like me ka hoʻohālikelike helu me ka hoʻohana ʻana i ka nānā ʻana i ka element finite a i ʻole nā ​​​​ʻano analytical e noʻonoʻo ana i nā waiwai magnetic o ka mea a me ka puʻunaue magnetization maoli i loko o ka cylinder.

ʻO ka ʻōlelo ʻana ʻaʻole ʻo ke kahua magnetic i loko o ka cylinder he kuhi hewa paha a he oversimplification paha. Ma keʻano laulā, ʻaʻole ʻaʻole ʻaʻole ʻaʻole ʻaʻole ke kahua magnetic i loko o kahi puʻupuʻu i hoʻohālikelike ʻia. Eia nō naʻe, ma muli o nā kūlana kikoʻī a me nā manaʻo, aia kekahi mau hihia kahi e nāwaliwali ai ke kahua magnetic i loko o kahi cylinder a hōʻike paha i kekahi mau waiwai e ʻike ʻole ʻia ai ke kahua.

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

1. Palekana
2. Hoʻohui like ʻole

He mea nui ia e hoʻomaopopo e pili ana ka mākēneki i loko o ka mea hoʻoheheʻe cylindrical i nā ʻano like ʻole, me ka puʻunaue magnetization, ke ʻano o ka magnet, nā waiwai waiwai, a me nā hopena o waho e like me nā māla magnetic kokoke a i ʻole ka pale. Ma keʻano laulā, hiki ke helu ʻia a hoʻohālikelike ʻia ka ikaika o ke kahua magnetic ma muli o kēia mau kumu, akā ʻaʻole paha e like ka ʻole o ke kahua i loko o ka cylinder magnetized uniformly.

ʻAe, hiki ke loaʻa kahi māla magnetic i loko o kahi puʻupuʻu puʻu, inā he ʻano magnetization ka cylinder. ʻO ka hele ʻana a me nā hiʻohiʻona o ka māla magnetic i loko o ka puʻupuʻu puʻupuʻu e pili ana i nā mea e like me ke kumu magnetization, nā waiwai waiwai, a me ka geometry 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 kumu magnetization, nā waiwai waiwai, a me ka geometry o ka cylinder. E noʻonoʻo kākou i kekahi mau hiʻohiʻona:

1. Pahu hoʻohiwahiwa ʻano like ʻole
2. ʻO ke kinikini mākēneki Radially
3. ʻO ka pahu hollow i hoʻopau ʻia
4. Paʻa Paʻi Mākēneki

He mau wehewehe maʻalahi kēia, a hiki ke paʻakikī ke ʻano maoli o ke kahua magnetic ma muli o nā kūlana kikoʻī a me nā manaʻo. I ka hoʻomaʻamaʻa ʻana, ʻike pinepine ʻia ka māhele magnetic me ka hoʻohana ʻana i nā hiʻohiʻona makemakika a i ʻole nā ​​polokalamu simulation e noʻonoʻo i nā kikoʻī kikoʻī o ka magnet a me kona kaiapuni.