I-YFB4 yochungechunge lwezintuli eziqhumayo-ubufakazi besigaba sesithathu se-asynchronous motor iyinjini evalekile ezivalele ngokugcwele e-self-fan-cooled squirrel-cage enezigaba ezintathu esynchronous motor. Inezici zobukhulu obuncane, isisindo esincane, ukusebenza okuthembekile, ukubukeka okuhle, njll. Ibuye ibe nokusebenza kahle okuphezulu, umsindo ophansi, ukudlidliza okuncane nokukhuphuka okuphansi kwezinga lokushisa. Ukusebenza okuhle kakhulu, okuthuthukile futhi okunengqondo kokuvikela ukuqhuma, ukusetshenziswa okuphephile nokuthembekile, njll.
Ama-ac motors angaqhumisi uthuli afaneleka kakhulu izindawo lapho kukhona khona uthuli oluvuthayo kwezokwelapha, izindwangu, insimbi, ukucubungula okusanhlamvu, ukucubungula okuphakelayo, umanyolo wamakhemikhali, ugwayi, ukwenza iphepha, izinto zokwenziwa, izinto zokwakha, njll.