A4 Conference proceedings

PWM-Induced Harmonic Power in 75 kW IM Drive System

Publication Details
Authors: Aarniovuori Lassi, Kärkkäinen Hannu, Niemela Markku, Pyrhönen Juha
Publication year: 2020
Language: English
Related Journal or Series Information: European Conference On Power Electronics And Applications
Title of parent publication: 2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)
Journal acronym: EPE-ECCE Europe
ISBN: 978-1-7281-9807-1
eISBN: 978-9-0758-1536-8
ISSN: 2325-0313
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication


More and more commonly, the rotating field machine drives are equipped with a frequency converter. The frequency converters enable the control of the magnetization state, torque and speed of the machine according to the needs of applications and, in principle, save energy. In turn, the pulse-width-modulation (PWM) creates additional harmonic losses over the fundamental losses in the machine. The harmonic power induced by the PWM is examined here in a case of 75 kW high efficiency squirrel-cage induction motor. The examination is carried out using an experimental setup with three commercial frequency converters at 30 different operation points of the motor. In each of the measurement points, the three-phase voltage and current waveforms are recorded as well as the corresponding electric power, current and voltage values. In the analysis, the harmonic power is segregated from the total electric power and examined as a function of the frequency, load and switching frequency.

Last updated on 2021-21-01 at 10:08