1. Pehea ka hoʻihoʻi ʻana i ka ikaika electromotive?
ʻO ka ʻoiaʻiʻo, maʻalahi ka hoʻomaopopo ʻana i ka hana o ka back electromotive force. Pono nā haumāna me ka hoʻomanaʻo maikaʻi aʻe ua ʻike ʻia lākou ma ke kula kiʻekiʻe a me ke kula kiʻekiʻe. Eia naʻe, ua kapa ʻia ʻo ia ka ikaika electromotive induced i kēlā manawa. ʻO ke kumu, ʻo ka mea alakaʻi e ʻoki i nā laina magnetic. ʻOiai ua lawa nā neʻe Relative ʻelua, ʻaʻole e neʻe ke kahua magnetic a ʻoki ka mea hoʻokele; ʻaʻole hoʻi e neʻe ka mea hoʻokele a neʻe ke kahua magnetic.
No kahi magnet mau synchronouskaʻa kaʻa, ua hoʻopaʻaʻia kona mau'ōwili ma ka stator (conductor), a ua hoʻopaʻaʻia nā magnet mau ma ka rotor (magnetic field). I ka wā e hoʻololi ai ka rotor, e hoʻohuli ʻia ka māla magnetic i hana ʻia e nā magnet mau loa ma ka rotor a huki ʻia e ka stator. Ua ʻoki ʻia ka ʻōwili ma luna o ka wili ahe mana hoʻokele uila hopehana ʻia i loko o ka wili. No ke aha i kapa ʻia ai ʻo back electromotive force? E like me ka inoa e hōʻike nei, no ka mea, ʻo ke kuhikuhi o ka ikaika electromotive hope E kū'ē i ke kuhikuhi o ka volta terminal U (e like me ka hōʻike ʻana ma ke Kiʻi 1).
2. He aha ka pilina ma waena o ka ikaika electromotive hope a me ka voltage terminal?
Hiki ke ʻike ʻia mai ka Figure 1 ʻo ka pilina ma waena o ka ikaika electromotive hope a me ka voltage terminal ma lalo o ka haʻawe:
No ka hoʻāʻo ʻana i ka ikaika electromotive hope, hoʻāʻo maʻamau ia ma lalo o ke kūlana no-loading, ʻaʻohe o kēia manawa, a ʻo ka wikiwiki o ka rotation he 1000rpm. ʻO ka mea maʻamau, ua wehewehe ʻia ka waiwai o 1000rpm, a ʻo ka coefficient ikaika electromotive hope = ka waiwai awelika o ka ikaika electromotive / wikiwiki. ʻO ka coefficient ikaika electromotive hope he mea koʻikoʻi o ke kaʻa. Pono e hoʻomaopopo ʻia ma ʻaneʻi e loli mau ana ka ikaika electromotive hope ma lalo o ka ukana ma mua o ka paʻa ʻana o ka wikiwiki. Mai ka hoʻohālikelike (1), hiki iā mākou ke ʻike ʻo ka ikaika electromotive hope ma lalo o ka ukana ʻoi aku ka liʻiliʻi ma mua o ka voltage terminal. Inā ʻoi aku ka ʻoi aku o ka ikaika electromotive hope ma mua o ka volta terminal, lilo ia i mea hana a hoʻopuka i ka uila i waho. Ma muli o ka liʻiliʻi o ke kū'ē a me kēia manawa i ka hana maoli, ua like ka waiwai o ka mana electromotive hope me ka volta terminal a ua kaupalena ʻia e ka helu helu o ka volta terminal.
3. ʻO ke ʻano kino o ka ikaika electromotive hope
E noʻonoʻo i ka mea e hiki mai ana inā ʻaʻole i loaʻa ka ikaika electromotive hope? Hiki ke ʻike ʻia mai ka hoʻohālikelike (1) me ka ʻole o ka ikaika electromotive hope, ua like ka motika holoʻokoʻa me kahi pale pale maʻemaʻe a lilo i mea hana e hoʻoulu ai i ka wela koʻikoʻi. ʻO kēiakū'ē i ka ʻoiaʻiʻo o ka hoʻololi ʻana o ke kaʻa i ka ikehu uila i lokoikehu mechanical.
I ka pilina hoʻololi ikehu uila
, UI ʻO ia ka ikehu uila hoʻokomo, e like me ka ikehu uila i hoʻokomo ʻia i loko o kahi pākaukau, motor a mea hoʻololi paha; ʻO I2Rt ka ikehu wela i kēlā me kēia kaapuni, ʻo kēia ʻāpana o ka ikehu ke ʻano o ka ikehu wela, ʻoi aku ka liʻiliʻi; hoʻokomo i ka ikehu uila a me ka poho wela ʻO ka ʻokoʻa o ka ikehu uila ka ʻāpana o ka ikehu pono e pili ana i ka ikaika electromotive hope.
, ʻo ia hoʻi, hoʻohana ʻia ka ikaika electromotive hope no ka hoʻoulu ʻana i ka ikehu pono, e pili ana i ka hopena o ka wela. ʻO ka nui o ka ikehu wela, ʻoi aku ka liʻiliʻi o ka ikehu pono hiki ke loaʻa.
ʻO ka manaʻo nui, hoʻopau ka mana electromotive hope i ka ikehu uila i ke kaapuni, akā ʻaʻole ia he "nalo". ʻO ka ʻāpana o ka ikehu uila e pili ana i ka ikaika electromotive hope e hoʻololi ʻia i ikehu pono no nā mea uila, e like me ka ikehu mechanical o ka kaʻa a me ka ikehu o ka pā. ikehu kemika etc.
Hiki ke ʻike ʻia ʻo ka nui o ka ikaika electromotive hope ʻo ia ka hiki o nā mea uila ke hoʻololi i ka huina o ka ikehu hoʻokomo i ka ikehu pono, a e hōʻike ana i ke kiʻekiʻe o ka hiki ke hoʻololi ʻia o ka mea uila.
4. He aha ka nui o ka ikaika electromotive hope?
E hāʻawi mua i ke ʻano helu helu o ka ikaika electromotive hope:
ʻO E ka ikaika electromotive o ka pōʻai, ψ ka hoʻopili magnetic, f ka alapine, N ka helu o ka huli ʻana, a ʻo Φ ka puʻupuʻu magnetic.
Ma muli o ka ʻōlelo ma luna, manaʻo wau hiki i nā mea āpau ke haʻi i kekahi mau mea e pili ana i ka nui o ka ikaika electromotive hope. Eia ka hōʻuluʻulu manaʻo o kahi ʻatikala:
(1) Ua like ka ikaika electromotive hope me ka loli o ka pilina magnetic. ʻO ke kiʻekiʻe o ka wikiwiki o ka hoʻololi ʻana, ʻoi aku ka nui o ka loli a ʻoi aku ka nui o ka ikaika electromotive hope;
(2) Ua like ka loulou makeke ponoi me ka helu o na huli i hoonuiia e ka lou hoohuli hookahi. No laila, ʻoi aku ka kiʻekiʻe o ka helu o nā huli, ʻoi aku ka nui o ka loulou magnetic a ʻoi aku ka nui o ka ikaika electromotive hope;
(3) Ua pili ka helu o na huli i ka wiliwili, pili hōkū-delta, ka helu o ka huli ma ka slot, ka helu o na pae, ka helu o na niho, ka helu o na lala like, ka huina holookoa a i ole ka papa pokole;
(4) Ua like ka pilina pili hoʻokahi hulina me ka ikaika magnetomotive i puʻunaue ʻia e ke kūpaʻa magnetic. No laila, ʻoi aku ka nui o ka ikaika magnetomotive, ʻoi aku ka liʻiliʻi o ke kūpaʻa magnetic i ke kuhikuhi o ka loulou magnetic, a ʻoi aku ka nui o ka ikaika electromotive hope;
(5) ʻO ke kūpaʻa magneticpili i ka laulima o ka ea a me ka pou pou. ʻOi aku ka nui o ka ea, ʻoi aku ka nui o ke kūpaʻa magnetic a me ka liʻiliʻi o ka ikaika electromotive hope. He paʻakikī ka hoʻohui ʻana o ka pole-groove a pono i ka nānā kikoʻī;
(6) Pili ka ikaika magnetomotive i ka remanence o ka magnet a me ka wahi kūpono o ka magnet. ʻO ka nui o ka remanence, ʻoi aku ka kiʻekiʻe o ka ikaika electromotive hope. ʻO ka wahi kūpono e pili ana i ka kuhikuhi magnetizing, ka nui a me ka hoʻokomo ʻana o ka magnet, a koi i ka loiloi kikoʻī;
(7) Pili ke koena magnetism i ka mahana. ʻO ke kiʻekiʻe o ka mahana, ʻoi aku ka liʻiliʻi o ka ikaika electromotive hope.
I ka hōʻuluʻulu ʻana, ʻo nā mea hoʻohālikelike o ka ikaika electromotive hope e pili ana i ka wikiwiki o ka huli ʻana, ka helu o ka huli ʻana i kēlā me kēia slot, ka helu o nā pae, ka helu o nā lālā like, ka pōkole holoʻokoʻa holoʻokoʻa, ke kaapuni magnetic kaʻa, ka lōʻihi o ka ea, ka hoʻonohonoho pole-slot, magnet residual magnetism, a me ke kūlana hoʻokomo magnet. A me ka nui magnet, kuhikuhi magnetization, wela.
5. Pehea e koho ai i ka nui o ka ikaika electromotive hope i ka hoʻolālā kaʻa?
I ka hoʻolālā kaʻa, koʻikoʻi ka ikaika electromotive hope E. Manaʻo wau inā hoʻolālā maikaʻi ʻia ka ikaika electromotive hope (koho nui kūpono a me ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa), e maikaʻi ke kaʻa. ʻO nā hopena nui o ka ikaika electromotive hope ma nā kaʻa e like me kēia:
1. ʻO ka nui o ka ikaika electromotive hope e hoʻoholo i ka wahi nāwaliwali o ka motika, a ʻo ka nawaliwali o ke kahua e hoʻoholo ai i ka māhele ʻana o ka palapala ʻāina ʻoihana.
2. E pili ana ka nui o ka distortion o ka hawewe kaha electromotive hope i ka ripple torque o ka motika a me ka pa'a o ka torque output ke holo ka motika.
3. ʻO ka nui o ka ikaika electromotive hope e hoʻoholo pololei i ka torque coefficient o ke kaʻa, a ʻo ka hoʻohui hope electromotive e pili pono ana i ka torque coefficient. Mai kēia hiki iā mākou ke huki i nā kū'ē'ē aʻe e kū nei i ka hoʻolālā kaʻa:
a. Ke piʻi aʻe ka ikaika electromotive hope, hiki i ke kaʻa ke mālama i ka torque kiʻekiʻe ma laloka mea hooponoponoe kaupalena i kēia manawa ma ka wahi hana haʻahaʻa haʻahaʻa, akā ʻaʻole hiki ke hoʻopuka i ka torque ma nā wikiwiki kiʻekiʻe, a i ʻole hiki i ka wikiwiki i manaʻo ʻia;
b. Ke liʻiliʻi ka ikaika electromotive hope, loaʻa ka mana hoʻopuka i ke kaʻa ma kahi o ka wikiwiki kiʻekiʻe, akā ʻaʻole hiki ke loaʻa ka torque ma lalo o ka mana hoʻokele like i ka wikiwiki haʻahaʻa.
No laila, ʻo ka hoʻolālā ʻana o ka ikaika electromotive hope e pili ana i nā pono maoli o ka kaʻa. No ka laʻana, i ka hoʻolālā ʻana o kahi kaʻa liʻiliʻi, inā koi ʻia e hoʻopuka i ka torque kūpono i ka wikiwiki haʻahaʻa, a laila pono e hoʻolālā ʻia ka ikaika electromotive hope e ʻoi aku ka nui.
Ka manawa hoʻouna: Feb-04-2024