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Synchronization Algorithm for Soft Switching of an Induction Motor between a Frequency Converter and Supply Network

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Abstract

An asynchronous electric drive based on a frequency converter with an automatic voltage inverter is considered that can be used both as part of a frequency-control station for a group of technological units and as a single electric drive. An approach is proposed to implementing the function of soft switching of an induction motor between the frequency converter and the supply network. The analysis of the processes associated with loss of the power supply voltage of a induction machine is performed. A brief analysis of the methods used in industry for switching the motor load between the supply network and the frequency converter is presented, and the range of their applicability is briefly discussed. An algorithm for automatic soft switching of an asynchronous motor between the supply network and the frequency converter is proposed. The power scheme of such an electric drive is considered, as well as the block diagram of the control system, which allows implementing the proposed algorithmic approach. The method of calculation of the frequency converter output voltage amplitude and phase regulators is presented. Simulation of control algorithms is performed, verifying their operability and feasibility.

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REFERENCES

  1. Pankratov, V.V., Usachev, A.P., and Gordeichik, A.V., Flying restart function in the frequency converters SM-400 and in the stations SCh-400 for drive group control. http://sibmech.ru/netcat_files/userfiles/doc/articles/6.pdf.

  2. Pankratov, V.V. and Kotin, D.A., Adaptivnye algoritmy bezdatchikovogo vektornogo upravleniya asinkhronnymi elektroprivodami pod”emno-transportnykh mekhanizmov (Adaptive Algorithms for Sensorless Vector Control of Asynchronous Electric Drives of Lifting-Transport Mechanisms), Novosibirsk: Novosib. Gos. Tekh. Univ., 2012.

  3. Kravchik, A.E., Shlaf, M.M., Afonin, V.I., and Sobolenskaya, E.A., Asinkhronnye dvigateli serii 4A (Asynchronous Engines of 4A Series), Moscow: Energoatomizdat, 1982.

  4. Vinogradov, A.B., Vektornoe upravlenie elektroprivodami peremennogo toka (Vector Control of AC Electric Drives), Ivanovo: Ivanovsk. Gos. Energ. Univ., 2008.

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Funding

This work was supported by the Russian Foundation for Basic Research, project no. 20-38-90185.

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Authors and Affiliations

  1. Novosibirsk State Technical University, 630073, Novosibirsk, Russia

    E. A. Domakhin & D. A. Kotin

Authors
  1. E. A. Domakhin
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  2. D. A. Kotin
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Correspondence to E. A. Domakhin.

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Translated by F. Baron

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Domakhin, E.A., Kotin, D.A. Synchronization Algorithm for Soft Switching of an Induction Motor between a Frequency Converter and Supply Network. Russ. Electr. Engin. 92, 314–319 (2021). https://doi.org/10.3103/S1068371221060067

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  • DOI: https://doi.org/10.3103/S1068371221060067

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