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Determination of Current Interharmonics of an Asynchronous Motor Operating under a Variable Periodic Load

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Abstract

Current interharmonics that emerge during the operation of an asynchronous electric motor under a variable periodic load are determined. Parameters of the fundamental harmonic of the current have been determined in a simulation model consisting of an asynchronous motor with a short-circuited rotor, a variable periodic load unit, a three-phase voltage source, and a subsystem for spectral analysis of current. The difference between the phase current of the asynchronous motor stator and its identified fundamental harmonic is determined. It is shown that, if the electric motor operates under a variable periodic load, current pulsations emerge in the stator, which are additional to the fundamental current harmonic and the frequencies of which are not multiples of the fundamental harmonic frequency. The resulting difference is presented in the form of a harmonic Fourier series to determine the frequencies, amplitudes, and phases of the interharmonics. To reduce the current interharmonics of devices operating under a variable periodic load, it is proposed to use active harmonic filters with fixed or automatically adjusted filtration parameters.

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Authors and Affiliations

  1. St. Petersburg State Marine Technical University, 190121, St. Petersburg, Russia

    B. A. Avdeev, S. G. Chernyi, I. S. Moiseev & A. A. Zhilenkov

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  1. B. A. Avdeev
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  2. S. G. Chernyi
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  3. I. S. Moiseev
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  4. A. A. Zhilenkov
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Corresponding author

Correspondence to B. A. Avdeev.

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The authors declare that they have no conflict of interest.

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Translated by M. Shmatikov

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Avdeev, B.A., Chernyi, S.G., Moiseev, I.S. et al. Determination of Current Interharmonics of an Asynchronous Motor Operating under a Variable Periodic Load. Russ. Electr. Engin. 93, 397–402 (2022). https://doi.org/10.3103/S1068371222060037

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  • DOI: https://doi.org/10.3103/S1068371222060037

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