Iron loss under practical working conditions of a PWM powered induction motor

Author

Cester, C. ; Kedous-Lebouc, A. ; Cornut, B.

Author_Institution

Moteurs Leroy-Somer, Angouleme, France

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3766

Lastpage

3768

Abstract

A study of additional loss in an induction motor supplied by a PWM inverter is presented in this paper. The magnetic material used in the motor is characterized, thanks to a suitable Epstein measurement equipment, under several excitation conditions: sine and ideal PWM waveforms similar to the voltage delivered by the inverter and practical working conditions of the material, measured in the different parts of the machine stator. Compared to sine, PWM signals induce much higher loss. Moreover, the distortion of the flux increases the additional loss. Those results are used to estimate the loss in the stator of the machine. By considering the real working conditions of the magnetic material, the discrepancy between the estimated value and experiment is less than 25% for the motor studied, whereas it can reach 120% in the case of a conventional prediction with a sinusoidal waveform

Keywords

PWM invertors; losses; magnetic flux; squirrel cage motors; stators; Epstein measurement equipment; PWM inverter; PWM powered induction motor; additional loss; excitation conditions; flux distortion; ideal PWM waveforms; iron loss; magnetic material; sine waveforms; sinusoidal waveform; squirrel cage motor; stator; Employee welfare; Frequency; Induction motors; Iron; Magnetic materials; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Stators; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.619565

Filename

619565