Ukuhlaziywa kwezimbangela zeisigaba sesithathu se-asynchronous induction AC motorukutubeka, izimbangela zokushiswa kwemoto ye-AC yezigaba ezintathu zingahlukaniswa ngomthwalo, ukunikezwa kwamandla, ukufakwa kwezimoto, nokulahlekelwa kwesigaba.
Injini ye-AC enezigaba ezintathu umthwalo (ukulayisha ngokweqile) ukutubeka: Injini iyashisisa ngaphansi kokusebenza kokugcwala kakhulu. Noma injini iqalwa njalo futhi ishiswe ngokweqile. Lapho zombili iziphetho ze-stator zishiswa ngaphakathi kwemoto futhi izingxenye ezishile ziba umfaniswano (ngokuvamile, injini inamandla okusebenza angashintshi, abizwa ngokuthi amandla akaliwe, ngama-watts (W), futhi kwezinye izimo lapho amandla angempela asetshenziswa injini edlula amandla alinganisiwe emoto, lesi simo sibizwa ngokuthi i-motor overload. Izizathu zokunikezwa kwamandla kagesi alula we-motor, i-voltage ye-AC iphansi kakhulu, i-voltage ye-AC iba nkulu kakhulu Ikaliwe, futhi i-motor ishisa kakhulu. I-voltage yokuhambisa amandla iphezulu kakhulu, futhi umshini wokwenza inyama uyasebenza esigabeni esingekho kuyinto ngezinye izikhathi kulula ukudideka nomshini wokosa inyama, futhi i-stator nayo izosha, kodwa kunezimpawu zokusha ezisobala engxenyeni ye-short-circuit, njengensimbi encibilikisiwe yethusi ngezinye izikhathi. Ingxenye ejikajikayo ishiswe kabi. Izizathu zokushiswa kweInjini ye-AC enezigaba ezintathuyilezi: 1. I-motor ithatha indlela yokuxhuma i-delta, isigaba esisodwa kuphela sokuvunguza singashiswa, futhi umonakalo wokufakelwa kwesigaba esisodwa sokujika phansi ungalinganiswa nge-megohmmeter. 2. I-motor ithatha indlela yokuxhumana yenkanyezi (y), futhi izigaba ezimbili zokusonta ziyashiswa. Ukulimala kokufakwa kwezigaba ezimbili zokusonteka phansi kungalinganiswa nge-megohmmeter (iwashi).