Realisation of tests to determine the parameters of the thermal model of an induction machine

Author

Moreno, J.F. ; Hidalgo, F.P. ; Martínez, M.D.

Author_Institution

Dept. de Ingenieria Electr., Univ. de Jaen, Spain

Volume

148

Issue

5

fYear

2001

fDate

9/1/2001 12:00:00 AM

Firstpage

393

Lastpage

397

Abstract

Tests are described to determine the parameters and coefficients of a thermal model, which allows one to estimate the stator and rotor temperatures in a three-phase induction machine, during operation. The model is obtained by analysing the power losses and the heat transmission inside the motor (considering it in two parts: stator and rotor) and with the environment. Two differential equations are deduced, which reflect, at each instant, the balance among the power losses, the evacuated heat and the stored heat in the motor. The study is carried out for a three-phase motor with a short-circuited rotor in a squirrel cage with nominal values. 1 kW, 380 V and 50 hz. From the stator and rotor temperatures provided by the thermal model, the updated values of the electrical resistances of the machine are obtained in real time during its operation

Keywords

differential equations; electric resistance measurement; losses; machine testing; machine theory; parameter estimation; rotors; squirrel cage motors; stators; temperature measurement; thermal analysis; 1 kW; 380 V; 50 Hz; differential equations; electrical resistances; heat transmission; parameters determination tests; power losses; rotor temperature; short-circuited rotor; squirrel cage; stator temperature; thermal coefficients; thermal model; three-phase induction machine; three-phase motor;

fLanguage

English

Journal_Title

Electric Power Applications, IEE Proceedings -

Publisher

iet

ISSN

1350-2352

Type

jour

DOI

10.1049/ip-epa:20010580

Filename

955372