Te ahunga whakamua, e pā ana ki tēnei, ka taea e koe te whakaaro ki te ahunga whakamua o te whiwhi tiwhikete ngaio, pērā i te CET-4 me te CET-6. I roto i te motuka, he wāhanga anō hoki tō te motuka. Kāore te raupapa i konei e pā ana ki te teitei o te motuka, engari ki te tere tukutahi o te motuka. Me tango te motuka taumata 4 hei tauira hei tiro i te tikanga motuhake o te raupapa motuka.
Ko te motuka Taumata 4 e pā ana ki te tere tukutahi 1-meneti o te motuka = {auau o te pūhiko hiko (50Hz) × 60 hēkona} ÷ (ngā wāhanga motuka ÷ 2) =3000 ÷ 2 = 1500 hurihanga. I roto i te wheketere, he maha ngā wā ka rongo tātou he maha ngā wāhanga o te motuka. Hei mārama, me mōhio tuatahi tātou ki te ariā o te pou: ko te pou e pā ana ki te pou aukume i hangaia e te rotor whakaputa hiko i muri i te whakamahinga o te ia whakaoho ki te koiri rotor. I roto i te poto, ko te tikanga ka taea e ia hurihanga o te rotor te whakaputa i ētahi huringa iahiko i roto i te hurihanga kotahi o te koiri stator. Me whakaputa he pūmanawa 50Hz mena he rerekē te maha o ngā pou. Me rerekē ngā tere. Ko te 50Hz, 60 hēkona me ngā meneti (arā, 3000) ka wehea ki te maha o ngā pou ko te maha o ngā hurihanga o te motuka ia meneti. He rite tonu mō te motuka, he tukanga whakamuri noa iho o te whakaputa hiko.
Ko te maha o ngā pou e whakaata ana i te tere tukutahi o te motuka. Ko te tere tukutahi 2-pou he 3000 rpm, ko te tere tukutahi 4-pou he 1500 rpm, ko te tere tukutahi 6-pou he 1000 rpm, ā, ko te tere tukutahi 8-pou he 750 rpm. Ka taea te mārama ko te 2-pou te tau turanga (3000), ka taea anake te wehewehe i ngā pou e 4 kia 2, ka taea te wehewehe i ngā pou e 6 kia 3, ā, ka taea te wehewehe i ngā pou e 8 kia 4. Engari ko te 2 ngā pou, me whakamahi te 3000 hei tango i te 2. Ko te nui ake o ngā pou o te motuka, ko te iti ake o te tere o te motuka, engari ko te nui ake o tōna taipana; i te wā e whiriwhiri ana i te motuka, me whakaaro koe ki te taipana tīmatanga e hiahiatia ana e te kawenga. Hei tauira, ko te taipana e hiahiatia ana mō te tīmatanga me te kawenga he nui ake i te tīmatanga kore-kawenga. Mena he tīmatanga mana nui, ā, he taumaha te kawenga, me whai whakaaro anō hoki ki te tīmatanga heke-iho (tīmatanga whetu-tara rānei); mō te tere e ōrite ana ki te kawenga i muri i te whakatau i te maha o ngā pou o te motuka, ka taea te whakaaro ki te taraiwa me te poro whitiki o te diameter rerekē, me te taputapu tere rerekē rānei (Pouaka Taputapu). Mena kāore e taea te whakatutuki i ngā whakaritenga mana o te kawenga i muri i te whakatau i te maha o ngā pou o te motuka mā te whitiki, te tuku taputapu rānei, me whai whakaaro ki te mana whakamahi o te motuka.
Ko te nuinga o te motuka AC-wāhanga-toru he mea tito mai i te stator me te rotor. Ina honoa te AC-wāhanga-toru ki te stator, ka puta he papa aukume hurihuri. E rua ngā pou o te papa aukume (ka taea hoki te kī he takirua), arā, ko te pou N (Pou Raki) me te pou S (pou tonga), e mōhiotia ana ko te pou taupatupatu. Ina rerekē te aratau takai o te takai stator motuka AC, ka rerekē te maha o ngā pou aukume o te papa aukume hurihuri. Ka pā tika te maha o ngā pou aukume ki te tere o te motuka, ā, ko tō rāua whanaungatanga: tere tukutahi = 60 × Taumata auau logarithm. Mena he 1500 rpm te tere tukutahi o te motuka, ka taea te tatau ko te logarithm pou he 2, arā, he motuka 4-pou e ai ki te tātai i runga ake nei. Ko te tere tukutahi me te logarithm pou ngā tawhā taketake o te motuka, ka kitea i runga i te pereti ingoa o te motuka. Nā te mea ka pā te logarithm pou ki te tere o te motuka, ka taea te whakarerekē i te tere o te motuka mā te whakarerekē i te logarithm pou o te motuka.
Mō ngā kawenga wai pērā i ngā pā me ngā papu, he āhuatanga nui tō tēnei momo kawenga. E ai ki te kōrero, ka kiia ko te ātete i te whakarerekētanga, ko te tikanga he nui te ātete o tēnei momo kawenga ki te whakarerekētanga o te āhua o nāianei. Ahakoa kāore i te teitei te taipana e hiahiatia ana hei whakatairanga i te huringa o tēnei momo kawenga, he nui te pūngao e hiahiatia ana hei whakarerekē tere i te āhua o nāianei. He rite ki te wai kohua. Ka taea hoki e te ahi iti te kohua, ā, me kohua wawe. Ka hohoro te kohua, ā, ko te ahi e hiahiatia ana ka tino nui.
Koinei ngā whakaahuatanga motuhake o te raupapa motuka. Mō tētahi auau me te ia tīmatanga kua whakaritea, kāore he hononga e kore e taea te karo i waenganui i a rāua. Ko te ia tīmatanga e whakawhirinaki ana ki te whakatakotoranga o te pihi tīmatanga VF me te roa o te wā whakatere. Mō te kawenga wai, mā te whakamahi i ngā pihi mana maha ka taea te whakaora i te hiko o ngā taputapu, ā, ka nui ake ngā painga ōhanga.
Wā tuku: Whiringa-ā-rangi-08-2021
