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Derating of Squirrel-Cage Induction Motors Due to High Harmonics in Supply Voltage

Author

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  • Tomasz Drabek

    (Faculty of Electrical Engineering, Automatics, Computer Science and Biomedical Engineering, AGH University of Krakow, 30-059 Kraków, Poland)

Abstract

This paper presents the results of load capacity calculations for three-phase squirrel-cage induction motors supplied with distorted voltage with rotating harmonics. The calculations were made on the basis of a commonly used model of an induction machine. The difference from many papers is that the parameters of the equivalent circuit of each motor were precisely determined in terms of power losses in the motor. The load capacity of the motors was made dependent on the load power losses in the rotor cage. These losses were determined on the basis of short-circuit measurements of motors, made for frequencies equal to harmonic frequencies. Measurements and calculations were made for low-voltage squirrel-cage motors with rated powers of 4–65 kW and various efficiency classes. Calculations have shown that the calculated derating curves do not match the curves given in IEC 60034-17 and NEMA MG1. The differences are up to 15% for IE1 and IE2 motors and more than 50% for IE3 motors.

Suggested Citation

  • Tomasz Drabek, 2023. "Derating of Squirrel-Cage Induction Motors Due to High Harmonics in Supply Voltage," Energies, MDPI, vol. 16(18), pages 1-16, September.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:18:p:6604-:d:1239311
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    References listed on IDEAS

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    1. Tomasz Drabek, 2023. "Derating of Squirrel-Cage Induction Motor Due to Rotating Harmonics in Power Voltage Supply," Energies, MDPI, vol. 16(2), pages 1-24, January.
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    Cited by:

    1. Halil Gör, 2024. "Feasibility of Six Metaheuristic Solutions for Estimating Induction Motor Reactance," Mathematics, MDPI, vol. 12(3), pages 1-43, February.

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    1. Halil Gör, 2024. "Feasibility of Six Metaheuristic Solutions for Estimating Induction Motor Reactance," Mathematics, MDPI, vol. 12(3), pages 1-43, February.

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