Comparison of measured and analytically calculated stray load losses in standard cage induction machines

Author

Hagen, A.R. ; Binder, A. ; Aoulkadi, M. ; Knopik, T. ; Bradley, K.

Author_Institution

Inst. of Electr. Energy Conversion, Darmstadt Univ. of Technol., Darmstadt

fYear

2008

fDate

6-9 Sept. 2008

Firstpage

1

Lastpage

6

Abstract

An analytical approach to calculate the stray load losses of cage induction machines at sinusoidal supply is compared with input-output measurements according to IEC 61972, which complies with the new standard IEC 60034-2, 4.0 ed. under preparation. The analytical approach allows the calculation of losses in the stator winding due to current displacement, due to harmonic rotor and inter-bar currents, due to tooth flux pulsations and eddy currents in the rotor surface, at any given slip, load and saturation level. Calculation and measurements are compared for 4-pole TEFC standard induction motors 1.1 kW, 11 kW, 75 kW and 110 kW.

Keywords

eddy current losses; squirrel cage motors; stators; 4-pole TEFC standard induction motors; cage induction machines; eddy currents; harmonic rotor; inter-bar currents; power 1.1 kW; power 11 kW; power 110 kW; power 75 kW; stator winding; stray load losses; tooth flux pulsations; Eddy currents; Harmonic analysis; IEC standards; Induction machines; Induction motors; Loss measurement; Measurement standards; Rotors; Stator windings; Teeth;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines, 2008. ICEM 2008. 18th International Conference on

Conference_Location

Vilamoura

Print_ISBN

978-1-4244-1735-3

Electronic_ISBN

978-1-4244-1736-0

Type

conf

DOI

10.1109/ICELMACH.2008.4800102

Filename

4800102