Induction motor with spiral sheet rotor

Abstract

In all of these dispositions, currents go through the cage conductors [3], while magnetic field is through the sheets. The performance of these motors depends on the magnetic field , the current and the distance from the conductor to the shaft. Abstract-Improvements in torque at low currents using a rotor with spiral sheets are analyzed. Several rotors and stators have been built combining different constructive and mechanical characteristics of the related elements : inertias, constructive materials, geometrical shapes of the sheets and geometrical disposition of the sheets . These different types of motors have been simulated using computer aided tools and then tested in the laboratory. Finally, four stators (1000, 1500, 1500-type A, and 3000 rpm) with the same constructive parameters, have been simulated and tested with the following rotors types: solid rotor, solid rotor with diamagnetic rings, drag cup, and simple and double squirrel cage rotor; the results have been compared to those obtained with the seven variants of spiral sheet rotor presented in this paper.lndex Terms-Electric machines, Special machine, Spiral sheet rotor, Three-Phase asynchronous motor.