简介:1.IntroductionItiswellknownthattheefficiencyandpowerfactorofthesolid-rotorinductionmotorarelowerthanthoseofthecagerotorin-ductionmotorduetolargerleakagereactance.Therefore,conduct-ingendringsareoftenfittedtorotorendstoimprovemotorper-formance.Mostoftheanalysesonthesolid-rotorinductionmotorwithendringshaveassumedthatthemotorisofinfinitecorelengthandtangentialcurrentintherotortobenegligible.