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Article

Collective Losses of Low Power Cage Induction Motors—A New Approach

1
Department of Electricity Power Plant, UTP University of Science and Technology in Bydgoszcz, 85-796 Bydgoszcz, Poland
2
Department of Power Electronics, Electric Machines and Drives, UTP University of Science and Technology in Bydgoszcz, 85-796 Bydgoszcz, Poland
*
Author to whom correspondence should be addressed.
Academic Editor: Michal Frivaldsky
Energies 2021, 14(6), 1749; https://doi.org/10.3390/en14061749
Received: 20 February 2021 / Revised: 15 March 2021 / Accepted: 19 March 2021 / Published: 22 March 2021
Energy efficiency of systems of water pumping is a complex problem since efficiency of two distinct interacting systems needs to be combined: water and power supply. This paper introduces a non-intrusive method of calculating the so-called “collective losses” of a cage induction motor. The term “collective losses”, which the authors define, allows for accurate estimation of motor efficiency. Control system of a pump determines operating point of a pumping station, and thus its efficiency. General estimated performance characteristics of a motor, components of a control system, are assumed to serve selection of a range of pumping speed variations. Rotational speed has a direct effect on motor load torque, pump power and head, and thus on motor performance. Hellwig’s statistical method was used to specify characteristics of estimated collective losses on the basis of experimental studies of 21 motors rated at up to 2.2 kW. The results of simulations and experiments are used to verify validity and efficiency of the suggested method. The method is non-intrusive, simple to use, and requires minimum data. View Full-Text
Keywords: energy efficiency; induction motors; motor losses; Hellwig’s method; estimation characteristic; water pump energy efficiency; induction motors; motor losses; Hellwig’s method; estimation characteristic; water pump
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MDPI and ACS Style

Szychta, E.; Szychta, L. Collective Losses of Low Power Cage Induction Motors—A New Approach. Energies 2021, 14, 1749. https://doi.org/10.3390/en14061749

AMA Style

Szychta E, Szychta L. Collective Losses of Low Power Cage Induction Motors—A New Approach. Energies. 2021; 14(6):1749. https://doi.org/10.3390/en14061749

Chicago/Turabian Style

Szychta, Elzbieta, and Leszek Szychta. 2021. "Collective Losses of Low Power Cage Induction Motors—A New Approach" Energies 14, no. 6: 1749. https://doi.org/10.3390/en14061749

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