Ke kaʻa hoʻololi

Nui nā ʻano mīkini uwila kaʻa.E like me kā lākou mau hana, ua māhele ʻia lākou i nā generators a me nā kaʻa.Wahi a ke ʻano o ka volta, ua hoʻokaʻawale ʻia lākou i nā kaʻa DC a me nā kaʻa AC.Wahi a kā lākou mau hana, ua hoʻokaʻawale ʻia lākou i nā motika synchronous a me nā motika asynchronous.E like me ka helu o nā kaʻina, hiki ke hoʻokaʻawale ʻia nā motika asynchronous i ʻekolu-phase asynchronous motors a me hoʻokahi-phase asynchronous motors;e like me kā lākou mau hana rotor ʻokoʻa, ua hoʻokaʻawale ʻia lākou i loko o ka hale a me nā ʻano rotor hōʻeha.Ma waena o lākou, he maʻalahi nā kaʻa asynchronous ʻekolu-phase i ka hoʻolālā a hana ʻia.ʻO ka maʻalahi, ke kumu kūʻai haʻahaʻa, ka hana hilinaʻi, ka mea i hoʻohana nui ʻia i nā ʻokoʻa like ʻole, ka koi nui loa.ʻOi aku ka paʻakikī o ka pale uila o nā mīkini uila (generators, adjusting cameras, large motors, etc.) ma mua o nā transformers, a ʻoi aku ka kiʻekiʻe o ka ulia pōpilikia ma mua o nā transformers.ʻO kēia no ka mea he ʻokoʻa nā ʻano o ka mīkini uila ʻokoʻa mai ka mea hoʻololi e pili ana i ke ʻano o ka insulation, ka hana a me ka hoʻonohonoho ʻana.
(1) Ma waena o nā mea uila o ka pae uila like, ʻo ka impulse e kū i ka pae uila o ka insulation o ka mīkini uila ka haʻahaʻa loa.
ʻO ke kumu: ①He kiʻekiʻe ka wikiwiki o ka mīkini rotating rotating, no laila hiki iā ia ke hoʻohana wale i ka medium paʻa, ʻaʻole hiki ke hoʻohana i ka solid-liquid (transformer oil) i ka hoʻohuihui hui ʻana e like me ka transformer: i ka wā o ke kaʻina hana, ua maʻalahi ka pōʻino o ka mea paʻa. , a ʻo ka insulation he Voids a i ʻole nā ​​āpau e hiki mai, no laila hiki ke hoʻokuʻu ʻia ka hapa i ka wā o ka hana, e alakaʻi ana i ka hoʻohaʻahaʻa insulation;②ʻO nā kūlana hana o ka insulation kaʻa kaʻoi loa o ke koʻikoʻi, e pili ana i nā hopena i hui pūʻia o ka wela, ka haʻalulu mechanical, ka makū i ka lewa, ka pollution, ke kaumaha electromagnetic, a me nā mea'ē aʻe , ʻOi aku ka wikiwiki o kaʻelemakule;③ ʻO ke kahua uila o ka ʻōnaehana insulation kaʻa he ʻano like ʻole, a ua kokoke kona hopena hopena i ka 1. ʻO ka ikaika uila ma lalo o ka overvoltage ka loulou nāwaliwali loa.No laila, ʻaʻole hiki ke kiʻekiʻe loa ke kiʻekiʻe o ka volta a me ka pae insulation o ke kaʻa.
(2) ʻO ke koena o ka uila o ka mea hopu uila i hoʻohana ʻia no ka pale ʻana i ke kaʻa kaʻa kaʻa ua kokoke loa i ka impulse kū i ka volta o ka motika, a he liʻiliʻi ka palena insulation.
No ka laʻana, ʻo ka manaʻo o ka hale hana e kū i ka waiwai hoʻāʻo uila o ka mea hana he 25% a 30% wale nō ke kiʻekiʻe ma mua o ka 3kA koena uila waiwai o ka zinc oxide arrester, a ʻoi aku ka liʻiliʻi o ka palena o ka mea hopu puʻu magnetic, a ʻoi aku ka palena o ka insulation. haʻahaʻa i ka holo ʻana o ka generator.No laila, ʻaʻole lawa ka hoʻomalu ʻia ʻana o ke kaʻa e ka mea hopu uila.Pono e pale ʻia e ka hui pū ʻana o nā capacitors, reactors, a me nā ʻāpana kelepona.
(3) Pono ka insulation ma waena o ka huli ʻana e kaupalena ʻia ka steepness o ka nalu komo.
Ma muli o ka liʻiliʻi o ka capacitance inter-turn o ka wili kaʻa kaʻa, hiki i ka nalu overvoltage ke hoʻolaha wale i ka conductor wili ma hope o ke komo ʻana i ka wili kaʻa, a ʻoi aku ka nui o ka lōʻihi o kēlā me kēia huli ʻana o ka wili. , e hana ana ma na huli pili elua Ua like ka overvoltage me ke ko'iko'i o ka nalu komo.I mea e pale ai i ka insulation inter-turn o ke kaʻa, pono e kaupalena ʻia ka steepness o ka nalu intruding.
I ka pōkole, kiʻekiʻe a paʻakikī nā koi pale uila o nā mīkini uila.Pono e noʻonoʻo pono i nā koi palekana o ka insulation nui, inter-turn insulation a me ka neʻe ʻana o ka wili.