Ii-stator windings zeemoto ezingakwaziyo ukuqhuma zineengxaki ze-short-circuit, ikakhulu eziquka i-interphase short-circuit (i-short-circuit yesigaba sesithathu okanye sesigaba sesibini) kunye ne-inter-turn short-circuit, ezidla ngokubangelwa kukonakala kwe-insulation. Xa kujongwa ezi meko, kufuneka kuthathwe amanyathelo afanelekileyo ukujongana nayo ukuze kuthintelwe umonakalo wemoto okanye neengozi zokhuseleko.
Unyango lwesekethe emfutshane phakathi kwesigaba: Xa isekethe emfutshane phakathi kwesigaba isenzeka, ngenxa yokuncipha kwenani lokujika kunye nokutshintsha kokutyibilika, ukuthintelwa kwemoto kuyancitshiswa, kwaye igalelo langoku elivela kumbane liya kwanda ngokukhawuleza. Ukuze kuthintelwe ukugqithiswa kwemoto kunye nomonakalo wokujika, umsebenzi oqhelekileyo wokulungisa kukunqumla ngokukhawuleza umbane, njengokuvala i-circuit breaker okanye i-fuse. Ukuba unyango lulibazisekile, ukujika kungonakala. Kwimeko yesekethe emfutshane yesigaba esibini okanye sesigaba sesithathu, ukuba indawo yesigaba ngasinye sesigaba sesekethe emfutshane ayihambelani, inokukhokelela ekusebenzeni okungalinganiyo kwemoto, uthotho lwangoku olungalunganga kunye nezinye iimeko ezingaqhelekanga, eziya kuchaphazela ukusebenza kunye nobomi bemoto.
Unyango lwe-Interturn short circuit: i-interturn short circuit ibhekisa ekubenikho kwe-short circuit phakathi kwee-coils kwi-winding efanayo. Oku kunokubangela ingxolo engaqhelekanga yemoto kunye nokungcangcazela. Indlela yonyango ikakhulu kukulungisa imoto ngokulungisa okanye ukutshintsha indawo eyonakeleyo ye-winding. Kwangaxeshanye, ezinye ii-windings nazo kufuneka zihlolwe ukuqinisekisa ukuba akukho ngxaki zimbi ezinokubakho.
Kufuneka kuqatshelwe ukuba i-interphase short circuit yemoto engaqhumiyo yeyona inzima, ingakumbi xa kwenzeka ekupheleni kwe-stator winding. Nje ukuba i-winding i-short circuits phakathi kwe-turns, i-turns eyonakeleyo iya kutshisa ngokukhawuleza, nto leyo enokukhokelela kumonakalo we-insulation okanye ukutsha. Ukongeza, i-motor inokuvelisa ingxolo engaqhelekanga, nto leyo ebonakala ngokucacileyo.
Ngokubanzi, xa ukujija kwe-stator yemoto engaqhumiyo kufinyeza umbane, inyathelo lokuqala kukunqumla umbane ngoko nangoko ukuze kuthintelwe umonakalo wemoto okanye iingxaki zokhuseleko. Emva koko, kufuneka uhlolo nokugcinwa ngononophelo ukuze kulungiswe inxalenye eyonakeleyo yokujija nokuqinisekisa ukuba imoto ibuyela ekusebenzeni okuqhelekileyo. Ukuba imeko imbi ngakumbi, inokufuna ulondolozo olunzulu kunye nokuxilongwa ziingcali ukuqinisekisa ukusebenza kunye nokhuseleko lwemoto. Kwangaxeshanye, uvavanyo kunye nokugcinwa rhoqo kwe-insulation nako kubalulekile ukuthintela iingxaki ze-wind short circuit.
Ixesha lokuthumela: Agasti-27-2023