Title :
Modelling of rotorbars with skin effect for dynamic simulation of induction machines
Author :
Langheim, Jochen
Author_Institution :
Inst. for Power Electron. & Electr. Drives, Aachen Univ. of Technol., West Germany
Abstract :
A mathematical model of a squirrel-cage induction motor is presented. It considers skin effect in rotor bars for frequencies up to about 1500 Hz. The main idea is to represent the rotor bars as a lumped network of resistances and inductances. The model is part of a complete simulation program for a full-power main line locomotive. It is used for a more accurate investigation of copper losses and torque pulsations in the motor. Theoretical results are compared to data calculated with a finite-element-method (FEM) program in order to get the parameters for the special shape of the motor which is applied in a locomotive. The limitations of the derived formulas and the advantages of FEM calculations are shown.<>
Keywords :
electric locomotives; finite element analysis; power engineering computing; rotors; squirrel cage motors; 1500 Hz; FEM; finite-element-method; main line locomotive; rotor bars; skin effect; squirrel-cage induction motor; torque pulsations; Bars; Copper; Finite element methods; Frequency; Induction motors; Mathematical model; Rotors; Shape; Skin effect; Torque;
Conference_Titel :
Industry Applications Society Annual Meeting, 1989., Conference Record of the 1989 IEEE
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/IAS.1989.96628
