A simplified thermal model for variable-speed self-cooled industrial induction motor

Author

Boglietti, Aldo ; Cavagnino, Andrea ; Lazzari, Mario ; Pastorelli, Michele

Author_Institution

Dipt. di Ingegneria Elettrica Industriale, Politecnico di Torino, Turin, Italy

Volume

39

Issue

4

fYear

2003

Firstpage

945

Lastpage

952

Abstract

In this paper, a simplified thermal model for variable-speed self-cooled induction motors is proposed and experimentally verified. The thermal model is based on simple equations that are compared with more complex equations well known in the literature. The proposed thermal model allows one to predict the over temperature in the main parts of the motor, starting from the measured or the estimated losses in the machine. In the paper, the description of the thermal model setup is reported in detail. Finally, the model is used to define the correct power derating for a variable-speed pulsewidth-modulation induction motor drive.

Keywords

cooling; induction motor drives; machine theory; pulse width modulation; thermal analysis; variable speed drives; 4 kW; estimated losses; measured losses; power derating; thermal model; variable-speed pulsewidth-modulation induction motor drive; variable-speed self-cooled industrial induction motor; Equations; Heat transfer; Impedance; Induction motors; Industry Applications Society; Rotors; Solid modeling; Stators; Temperature; Testing;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2003.814555

Filename

1215422