Performance of High-Power, High-Speed Induction Motor with Slitted-Rotor

Abstract

An attempt has been made to analyze the methods to improve the electromagnetic properties of a solid-rotor induction motor. The slip of the solid rotor is reduced notably if the solid rotor is axially slitted. The slitting patterns of the solid rotor are examined. It is shown how the slitting parameters affect the produced torque. Finite element analysis is used to numerically analyze the effect of axial slitted rotor on the electromagnetic performance characteristics of a 180 kW, 170 Hz 3-phase induction motor. The paper considered the effect of variation of slit depth, variation of no of rotor slits and the variation of air gap length on the performance of 3-phase induction motor using Flux-2D Maxwell software package from ANSYS. It is found that larger and deeper slit of the rotor with minimum valve of air gap gives the better and higher operating torque. It is also found that deeper slit gives the higher efficiency of the slitted rotor, high speed induction motor.