Torque Characteristic of Induction Motor with Cylindrical Rotor by Combining Cupper and Non-oriented Electrical Steel Sheet under Two Phase Excitation Condition

Abstract

In this paper, torque characteristics of an induction motor with a hybrid rotor made of copper and non-oriented electrical steel sheet will be examined under two-phase excitation. At first the magnetic flux density and eddy current distribution of the induction motor with the hybrid rotor were clarified analytically with electromagnetic field analysis. Next, the induction motor with the hybrid rotor was fabricated by fitting the copper ring into the laminated non-oriented electrical steel sheet, and the torque characteristics of the induction motor with the hybrid rotor and solid rotor were measured. It was found that the torque of the hybrid rotor was about twice greater than that of the solid rotor.