ʻO ke alakaʻi ʻana i ka PCB Insulation Guide

2024-01-04

  Ke kahe nei ka manawa ma o ka PCB a i ʻole ka papa kaapuni paʻi, hoʻohua ʻia ka wela. Me ka ʻole o ka insulation kūpono, hiki i kēia wela ke hana i nā pilikia koʻikoʻi no ka PCB.

 

No ke aha e pono ai i nā PCB ke hoʻokaʻawale?


  No ka hoʻomaopopo ʻana i ka insulation PCB, he mea koʻikoʻi e hoʻomaopopo i ke ʻano o ka PCB.


PCB


  ʻO ka PCB, a i ʻole ka papa kaapuni i paʻi ʻia, he ʻōmaʻomaʻo (a i ʻole nā ​​kala ʻē aʻe) huinahā me nā ʻāpana keleawe ma luna. Hiki ke loaʻa iā lākou ma nā mea uila a pau! Hoʻohana pono nā papa kaapuni i paʻi ʻia i nā mea uila, e hoʻolilo iā lākou i mea koʻikoʻi akā ʻike pinepine ʻole ʻia o ke ola o kēlā me kēia lā.  

       

  He hana nui ka uila no nā PCB. Loaʻa i nā PCB nā uwea keleawe i paʻi ʻia, no laila ke alakaʻi maoli lākou i ka uila. Eia nō naʻe, inā ʻaʻole i hoʻopili ʻia nā ʻāpana uila i loko o nā hale non-conductive a wela loa paha, hiki i ka hopena ke hopena. Pono e hoʻokaʻawale ʻia nā PCB no ka pale ʻana i nā mea keleawe mai ka ʻino a hōʻemi i ka hoʻopili ʻana me nā mea conductive. Hiki i ka insulation kūpono ke pale i ka PCB overheating a pahū paha.


  Nui nā ala e hoʻokaʻawale i nā PCB. Aia kekahi mau mea hoʻoheheʻe maʻamau, akā ʻo ke ʻano kikoʻī o ka insulation maʻamau maʻamau i ka noi no ka PCB i hoʻolālā ʻia.

 

ʻO nā mea pale PCB

  Lawe ʻia nā mea hoʻoheheʻe PCB maʻamau i ke ʻano o nā substrates non-conductive hiki ke hoʻohui pū ʻia i loko o nā papa he nui e hiki ai ke kahe pololei i ke au ma ka papa kaapuni. Hiki i nā PCB maʻalahi ke ʻaoʻao hoʻokahi a i ʻole ka pae hoʻokahi. ʻO nā PCB paʻakikī (e like me nā mea i hoʻohana ʻia no ke kamaʻilio kikohoʻe kikohoʻe kiʻekiʻe) hiki ke loaʻa ma luna o iwakālua mau papa.


  Hiki i ka calculator insulation PCB ke kōkua iā ʻoe e hoʻoholo i ka mamao o ka creepage a me ka hoʻomaʻemaʻe uila, ʻo ia ka mea e hoʻoholo ai i nā kumu no ke ʻano pololei a me ka nui o nā mea insulation. ʻO ka mamao o ka creepage ka mamao pōkole loa ma waena o nā ʻāpana conductive, ʻoiai ka wehe ʻana e pili ana i nā mea i hoʻokaʻawale ʻia e ka ea ma mua o ka substrate. He mea koʻikoʻi ka hoʻomaopopo ʻana i ka mamao creepage a me ka hoʻomaʻemaʻe uila no ka helu ʻana i ka insulation PCB.


  Hiki i nā ʻoihana hana PCB ke koho mai nā mea ʻokoʻa like ʻole no ka insulation, mai nā plastics inexpensive e like me FR-2 i nā metala ikaika a paʻa e like me ka alumini. ʻO ka mea i hoʻohana ʻia no ka insulation PCB e hilinaʻi maʻamau i ka hoʻohana i manaʻo ʻia. No ka laʻana, ʻaʻole pono nā PCB i nā mea pāʻani uila liʻiliʻi e like me ke ʻano o ka insulation e like me nā mea ma nā satellite artificial.


  No ka hoʻomaopopo maikaʻi ʻana i nā mea hoʻoheheʻe PCB a me nā ʻano o ka insulation, e ʻimi kākou i nā ʻano ʻelima maʻamau o nā mea hoʻolale PCB.

 

FR-2-AE

  ʻO FR-2 kahi koho laminate haʻahaʻa haʻahaʻa. He mea hoʻohui i hana ʻia me ka pepa a me ka resin phenolic, e hoʻomāmā a paʻa. Hoʻohana mau nā papa kaapuni ʻaoʻao hoʻokahi i kēia mea. ʻO FR-2 he halogen-noa, non-hydrophobic, a maʻalahi ke kuʻi a wili paha. ʻO FR-2 kekahi o nā koho haʻahaʻa loa no ka insulation PCB a he koho maʻamau ia no nā ʻoihana e hana ana i nā mea hoʻohana uila.

 

FR-4-AE

  FR-4-AE ʻO kahi koho laminate e pale ai i ka lapalapa ahi kiʻekiʻe. He mea hoʻohui i hana ʻia me ka lole i ulana ʻia i ke aniani a hoʻohana maʻamau i ka hana ʻana i nā PCB ʻaoʻao ʻelua a me nā ʻāpana he nui. Hiki iā FR-4 ke kū i nā wela kiʻekiʻe a me ke kaomi kino i hoʻohālikelike ʻia me FR-2. He mea waiwai hoʻi ia, e lilo ia i koho kaulana no nā mea hana uila uila kiʻekiʻe. ʻAʻole wikiwiki ka wikiwiki o ka hana ʻana o FR-4 a koi i ka wili, kuʻi, a i ʻole ka mīkini me nā mea hana tungsten carbide.


FR4 pepa

RF

  Hoʻolālā ʻia nā substrate RF e ʻae i nā PCB e hana i nā noi e pili ana i ka RF mana kiʻekiʻe a me nā microwaves. Hoʻohana maʻamau ʻia nā substrates RF i nā mea uila uila, avionics, a me nā hoʻonohonoho uila aerospace. E hoʻomanaʻo naʻe, aia kekahi mau huahana uila uila i kēia ʻano substrate. ʻAʻole hana nā plastics e hana i nā substrates RF maʻamau i ka nui o ka insulation, akā hana maikaʻi ke hana ʻia me ka hana ʻana i nā kahawai nui. ʻO ka RF a me ka microwave PCB maʻamau he hoʻokahi a ʻelua wale nō papa.

 

'ōlewa

  ʻOiai ʻo ka hapa nui o nā papa kaapuni i paʻi ʻia he palahalaha a ʻoʻoleʻa, aia nō kekahi mau PCB hou e hiki ke kūlou ma kahi kokoke i nā ʻaoʻao me ka haki ʻole. Pono nā kaapuni maʻalahi i ke ʻano like akā ʻokoʻa o ka insulation. Hoʻomalu pinepine ʻia nā kaapuni maʻalahi me ka hoʻohana ʻana i nā ʻōpala insulation PCB, a ʻo ke kiʻiʻoniʻoni he mea kaulana hoʻi. Pono nā kaʻapuni maʻalahi i nā uhi hoʻoheheʻe PCB lahilahi a paʻa i hiki iā lākou ke neʻe kūʻokoʻa a komo i loko o nā ākea haiki.

 

Metal

  He mea ʻē paha ke koho ʻana i ka metala ma ke ʻano he insulator. ʻO nā metala maʻamau ka conductive, a hiki i ka conductivity ulia ke kumu i nā hewa PCB, ke ahi a me ka hoʻoheheʻe ʻana. Eia nō naʻe, i kekahi mau kūlana, ʻoi aku ka maikaʻi o nā PCB me nā substrate metala. ʻO ka metala kahi mea hoʻokele wela maikaʻi loa a hiki ke kū i nā au nui me ka ʻole o ka haki ʻana a i ʻole ke ahi. Pono paha nā PCB i hoʻokomo ʻia i nā mea hoʻohana mana i nā substrate metala e hana pono.

 

Ka hopena ʻoihana

  No ka pale ʻana i nā PCB mai ka wela nui ʻana, hopu i ke ahi, a pahū paha, pono lākou e hoʻokaʻawale ʻia. ʻO ke ʻano o ka mea insulation e pili ana i ke ʻano o ka hoʻohana i hāʻawi ʻia e ka PCB.


  He kūpono nā PCB uila maʻamau no ka hoʻohana ʻana i nā substrate FR-2 a i ʻole FR-4 maʻalahi. ʻOi aku ka maikaʻi o nā substrate RF no nā noi e pili ana i ka RF mana kiʻekiʻe.


  ʻO nā substrate maʻalahi e like me nā plastics he kūpono no ka hālāwai ʻana i nā pono insulation o nā papa kaapuni maʻalahi. Hiki i nā metala ke mālama i ka uila uila me ka mālama ʻana i ka conductivity thermal maikaʻi loa.

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