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Electric Motor Efficiency under Variable Frequencies and Loads





ITRC Report No.

R 06-004



65 pages



CSU/ARI, US Bureau of Reclamation, and California Energy Commission PIER


Full Reference

Irrigation Training & Research Center.  2006.  Electric Motor Efficiency under Variable Frequencies and Loads.  ITRC, California Polytechnic State University, San Luis Obispo, California, USA.






The primary research objective of this study was to determine motor efficiencies under varying speeds (induced by a VFD controller) and loads.  A broader objective was to provide sufficient information to designers and economists so that they could estimate total pumping plant power usage with a VFD-controlled installation.  Motors were tested with VFDs as well as across-the-line.



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