Ama-stator windings ama-motor angenawo ukuqhuma anezinkinga ze-short-circuit, ikakhulukazi okuhlanganisa i-interphase short-circuit (i-three-phase noma i-two-phase short-circuit) kanye ne-inter-turn short-circuit, okuvame ukubangelwa umonakalo we-insulation. Uma sibhekene nalezi zimo, kudingeka kuthathwe izinyathelo ezifanele zokubhekana nazo ukuze kugwenywe umonakalo wemoto noma ngisho nezingozi zokuphepha.
Ukwelashwa kwesekethe esifushane phakathi kwesigaba: Uma kwenzeka isekethe esifushane phakathi kwesigaba, ngenxa yokwehla kwenani lokujika kanye nokushintsha kokushelela, ukuvimba kwemoto kuyancipha, futhi okokufaka kwamanje okuvela ekuhlinzekweni kwamandla kuzokhula ngokushesha. Ukuze kuvinjelwe ukugcwala ngokweqile kwemoto kanye nomonakalo wokugoba, umsebenzi ojwayelekile wokulungisa uwukunqamula ngokushesha ukunikezwa kwamandla, njengokuvala i-circuit breaker noma i-fuse. Uma ukwelashwa kubambezelekile, ama-winding angonakala. Endabeni yesekethe esifushane esinezigaba ezimbili noma ezintathu, uma indawo yesigaba ngasinye sesekethe esifushane ingaguquguquki, kungaholela ekusebenzeni okungalingani kwemoto, umugqa wamanje we-negative sequence kanye nezinye izimo ezingavamile, okuzothinta ukusebenza nokuphila kwemoto.
Ukwelashwa kwesekethe esifushane se-Interturn: isekethe esifushane se-interturn sibhekisela ekuveleni kwesekethe esifushane phakathi kwama-coils ekujikijeleni okufanayo. Lokhu kungabangela umsindo wemoto ongavamile kanye nokudlidliza. Indlela yokwelapha ngokuyinhloko iwukulungisa imoto ngokulungisa noma ukufaka esikhundleni ingxenye yokujikijela eyonakele. Ngesikhathi esifanayo, amanye ama-winding nawo kudingeka ahlolwe ukuqinisekisa ukuthi azikho ezinye izinkinga ezingaba khona.
Kufanele kuqashelwe ukuthi i-interphase short circuit yemoto engaqhumi iyona ebucayi kakhulu, ikakhulukazi uma kwenzeka ekugcineni kwe-stator winding. Uma i-winding isifinyeziwe phakathi kokujika, ukujika okonakele kuzoshisa ngokushesha, okungaholela ekulimaleni kokushisa noma ngisho nasekushiseni. Ngaphezu kwalokho, imoto ingase ikhiphe umsindo ongajwayelekile, okuwuphawu olusobala.
Ngokuvamile, lapho ukugoqa kwe-stator kwemoto engaqhumi kufinyeza ukujikeleza, isinyathelo sokuqala ukunqamula ukunikezwa kwamandla ngokushesha ukuze kugwenywe umonakalo wemoto noma izinkinga zokuphepha. Ngemuva kwalokho, ukuhlolwa nokugcinwa ngokucophelela kuyadingeka ukulungisa ingxenye eyonakele yokugoqa nokuqinisekisa ukuthi imoto ibuyela ekusebenzeni okuvamile. Uma isimo sibi kakhulu, kungadinga ukulungiswa okujulile nokuxilongwa ochwepheshe ukuqinisekisa ukusebenza nokuphepha kwemoto. Ngesikhathi esifanayo, ukuhlolwa nokugcinwa njalo kokushisa nakho kubalulekile ukuvimbela izinkinga zokugoqa ukujikeleza.
Isikhathi sokuthunyelwe: Agasti-27-2023