Comparison of standards for determining efficiency of three phase induction motors

Author

Renier, B. ; Hameyer, K. ; Belmans, R.

Author_Institution

Dept. of Electr. Eng., Katholieke Univ., Leuven, Heverlee, Belgium

Volume

14

Issue

3

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

512

Lastpage

517

Abstract

The paper describes a set of experiments and discusses their results for determining the efficiency of low voltage, three phase squirrel cage induction motors. The measured efficiency of an induction motor directly connected to the grid, strongly depends on the method used to evaluate the results and the standard according to which the measurements are performed. Different standards as IEEE 112 and IEC 32 are mentioned and their similarities and differences are discussed. The main discrepancies between the various standards is the way in which the values for the stray load losses are obtained at different load levels. A short description of the measurement setup is given and measurement results for motors of several manufacturers accounting for different standards are proposed. The results clearly demonstrate the necessity to handle the efficiency data given by the manufacturer with a lot of care

Keywords

load (electric); loss measurement; machine testing; measurement standards; squirrel cage motors; IEC 32; IEEE 112; LV three-phase squirrel cage motors; efficiency determination standards; grid connection; induction motors; load levels; measurement results; measurement setup; standards comparison; stray load losses; Electrical resistance measurement; Hysteresis motors; IEC standards; Induction motors; Loss measurement; Low voltage; Manufacturing; Measurement standards; Stators; Temperature;

fLanguage

English

Journal_Title

Energy Conversion, IEEE Transactions on

Publisher

ieee

ISSN

0885-8969

Type

jour

DOI

10.1109/60.790906

Filename

790906