Abstract
Stray load losses are calculated as the difference between the measured total losses and the losses found by summing no load loss and copper losses. The losses are variously attributed to many factors including the effects of slotting in rotor and stator, interbar currents arising out of cast aluminum rotor bars, and secondary effects such as those due to saturation of some regions. For large machines the efficiency is usually presumed to be decreased by 0.5% from full load efficiency due to such losses. However, various studies suggest that small sizes of cast rotor squirrel cage induction motors can be severely derated due to these losses, by as much as 9.3% [1].
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References
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© 1988 Kluwer Academic Publishers
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Findlay, R.D., Jimoh, A.A., Szabados, B. (1988). Development of Parasitic Torques Leading to Shaft Vibrations in Induction Motors. In: Belmans, R., Binns, K.J., Geysen, W., Vandenput, A. (eds) Vibrations and Audible Noise in Alternating Current Machines. NATO ASI Series, vol 148. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2815-2_17
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DOI: https://doi.org/10.1007/978-94-009-2815-2_17
Publisher Name: Springer, Dordrecht
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