Torsional stress analysis ofsquirrel cage windings of asynchronous motors

Author

D´Arco, S. ; Iannuzzi, D. ; Piegari, L. ; Tricoli, P.

Author_Institution

Dept. of Electr. Eng., Naples Univ.

fYear

2006

fDate

23-26 May 2006

Firstpage

39

Lastpage

43

Abstract

In the last decades the use of asynchronous machine in industrial and traction applications has been widespread also aided by the development of electrical drives and control techniques. It has been noted that distorted feeding voltages causes, in some cases, the breaking of squirrel cages. In order to investigate these phenomena, in the paper, authors have studied the mathematical model of the mechanical behaviour of the rotor cage of an asynchronous motor. A calculus procedure for obtaining an analytical solution of this mathematical model is suggested. The analytical solution expresses the natural torsional frequencies of the rotor cage as a function of the bar overhang and stiffness. The theoretical procedure presented can be used as a design guideline in order to prevent the breaking of the end-bar junctions when the motor is supplied by PWM inverters. The theoretical procedure is completed by a numerical analysis

Keywords

PWM invertors; induction motor drives; machine windings; numerical analysis; squirrel cage motors; traction; PWM inverters; asynchronous motors rotor cage; electrical drives; end-bar junctions; industrial applications; mathematical model; numerical analysis; squirrel cage windings; torsional stress analysis; traction applications; Calculus; Frequency; Guidelines; Industrial control; Mathematical model; Pulse width modulation inverters; Rotors; Stress; Traction motors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics, Electrical Drives, Automation and Motion, 2006. SPEEDAM 2006. International Symposium on

Conference_Location

Taormina

Print_ISBN

1-4244-0193-3

Type

conf

DOI

10.1109/SPEEDAM.2006.1649741

Filename

1649741