Okufanayoinjini yesigaba ezintathuingaxhunywa ngokuxhumeka konxantathu, okuhambisana ne-voltage ephansi; Ingaxhunywa futhi ngokwendlela yokuxhumeka kwenkanyezi, okuhambisana ne-voltage ephezulu; I-voltage ephezulu iphindwe kathathu kunempande yesikwele ye-voltage ephansi. Isibonelo, imoto engu-380V enokuxhumeka okungunxantathu, uma ixhunywe ngokuxhumeka kwenkanyezi, i-voltage ehambisanayo ingu-660V. Ukuxhumeka okuthile kufanele kuhambisane ne-voltage yokunikezwa kwamandla.
Injini exhunywe ngezinkanyezi ayikhiqizi ukujikeleza kwegazi ngaphakathi, okuyinto engcono ngokwengqondo kunokuxhumeka okungunxantathu.
Ngenxa yokuthi ukugoqa kwezigaba ezintathu akunakulinganiswa ngokuphelele, kuhlale kunomehluko omncane kuInjini enezigaba ezintathui-voltage, ezokwakha ukujikeleza ngaphakathi konxantathu, okuholela ekushiseni kwenjini kanye nokunciphisa ukusebenza kahle. Ukuxhumeka okungunxantathu kwenziwa futhi ngezizathu zomlando, okungukuthi, ukuqala kwenkanyezi-nxantathu, ukuqala kwenkanyezi-nxantathu kunganciphisa ngempumelelo amandla okuqala, kodwa kuzonciphisa i-torque yokuqala, ngakho-ke ingasetshenziswa kuphela esimweni somthwalo omncane noma isimo sokuqala esingenamthwalo.
Siyabona ukuthi injini yephampu yomoya ingaqalwa nge-star-triangle, kodwa ngokuqinisekile akukho ukuqala kwe-star-triangle ku-crane, ukuphakamisa kuqala kakhulu ngokumelana nochungechunge lwe-rotor olugoqayo, kungani senza inkinga engaka, kunesizathu. Yiqiniso, izimo zamanje zokuqala ukuguqulwa kwemvamisa zixazulule ngokuphelele izinkinga ezinjalo.
Kungakhathaliseki ukuthi uhlelo olunezintambo ezintathu noma olunezintambo ezine (ngaphandle komhlabathi), i-Engela kagesi phakathi kwama-voltage ezigaba ezintathu ingumehluko wesigaba sama-degrees angu-120 ngaphansi kwezimo ezifanele. Kucatshangwa ukuthi ngenxa yokuphazamiseka okuvamile, ama-harmonics e-3N akhiqizwa ekugoqeni kwesigaba se-load terminal, i-3N*120=360N, okubonisa ukuthi isigaba se-voltage ye-harmonic yezigaba ezintathu ifana ncamashi, uma ubukhulu bufana, ama-harmonics e-3N amaqembu amathathu e-line voltage azokhanselwa ngokuphelele, okungukuthi, akukho ma-harmonics amaningi aphelele angu-3 ku-voltage phakathi kwemigqa.
Ngokuxhumeka konxantathu, imisinga ye-harmonic ye-3N engenhla esigabeni esifanayo ifinyezwa kancane kulonxantathu futhi igcinwa kulonxantathu ukuze yakhe ukujikeleza okungenamkhawulo. Ngakho-ke, ngenxa yokuba khona kwama-harmonics, uxhumano lwe-triangular noma lwenkanyezi lungakhethwa ngokuya ngokuthi ama-harmonics e-3N angenzeka yini ku-voltage noma ku-current.
Isikhathi sokuthunyelwe: Septhemba-19-2024