A4 Conference proceedings

Advanced Uncertainty Calculation Method for Converter-Fed Motor Loss Determining

Open Access publication

Publication Details
Authors: Kärkkäinen Hannu, Aarniovuori Lassi, Niemelä Markku, Pyrhönen Juha
Publication year: 2019
Language: English
Title of parent publication: 2019 IEEE International Electric Machines & Drives Conference (IEMDC)
ISBN: 978-1-5386-9351-3
eISBN: 978-1-5386-9350-6
JUFO-Level of this publication: 1
Open Access: Open Access publication
Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe202001283681


There is only a single practical method to determine the losses of converted-fed electrical machines. The method is based on mechanical output and electrical input power measurements. When this method is used, the loss measurement uncertainty is a function of the efficiency. The electrical motor efficiency increases non-linearly with increasing rated power. Therefore, the higher the rated power of the motor is the more care should be laid in the analysis of the efficiency measurement results. Here, a workflow starting from measurement instruments' data sheet information to final measurement uncertainty result is presented for three converted-fed induction motors with different rated power of 15 kW, 37 kW and 75 kW. The results are applicable for all rotating field machines regardless of technology.

Last updated on 2020-20-03 at 10:03