Minimizing Induction Motor Losses by Excitation Control in Variable Frequency Drives

1 September 1984

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industry Applications

Vol. IA-20 (5) , 1244-1250
https://doi.org/10.1109/tia.1984.4504590

Abstract

For a given induction motor under a specified load condition, a combination of stator voltage and frequency exists which results in minimum power losses. This optimal operating point is calculated over the complete speed and torque range using a model of the induction machine including saturation, stray losses, and skin effect. It is shown that substantial power savings can be achieved compared to conventional programmed volts/hertz control and that main flux saturation has a dominant role in determining the optimal operating condition. A detailed analysis of the mechanisms yielding power savings is presented as well as an experimental confirmation of the theoretical results. These results are utilized to study thetinfluence of machine size, rated slip, and other factors on the optimal performance.

Keywords

This publication has 6 references indexed in Scilit:

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