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Grid and PV Fed Uninterruptible Induction Motor Drive Implementation and Measurements

Author

Listed:
  • Ruben Rafael Boros

    (Institute of Physics and Electrical Engineering, University of Miskolc, 3515 Miskolc, Hungary)

  • István Bodnár

    (Institute of Physics and Electrical Engineering, University of Miskolc, 3515 Miskolc, Hungary)

Abstract

Motors powered directly from solar panels are becoming more and more popular in pump applications. However, solar panels can be the source of operational issues due to varying irradiance, ambient temperature, weather. This paper shows how it is worth expanding a solar induction motor drive to provide an uninterrupted flow of electricity to the motor. In addition, the main components of the uninterruptible induction motor drive are presented, including the LLC (inductor-inductor-capacitor) converter, the three-phase inverter, and the three-phase rectifier. LLC converters that can increase the voltage from 25–40 V to 330 V cannot be bought directly from manufacturers. Therefore, a custom LLC converter was made for the research. It was necessary to build a custom converter to avoid the use of solar panel strings. This way, solar panels connected in parallel can be used. A low-voltage (25–40 V) supply was implemented from the solar side, while the induction motor requires 230 V AC three-phase voltage in delta connection. For this reason, a voltage boost is required from the low voltage side. The grid feeds the universal DC link through the three-phase rectifier. This allows the motor to consume varying amounts of electricity from the grid or the solar panel. The study also presents in detail the LLC converter that performs the voltage boost. Measuring the entire motor drive, switching transients and efficiencies can be observed at different input voltages for different supplies as well as loads.

Suggested Citation

  • Ruben Rafael Boros & István Bodnár, 2022. "Grid and PV Fed Uninterruptible Induction Motor Drive Implementation and Measurements," Energies, MDPI, vol. 15(3), pages 1-18, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:3:p:708-:d:728127
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    References listed on IDEAS

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    1. Manuel Escudero & Matteo-Alessandro Kutschak & Francesco Pulsinelli & Noel Rodriguez & Diego Pedro Morales, 2021. "On the Practical Evaluation of the Switching Loss in the Secondary Side Rectifiers of LLC Converters," Energies, MDPI, vol. 14(18), pages 1-23, September.
    2. Mohamed Derbeli & Cristian Napole & Oscar Barambones & Jesus Sanchez & Isidro Calvo & Pablo Fernández-Bustamante, 2021. "Maximum Power Point Tracking Techniques for Photovoltaic Panel: A Review and Experimental Applications," Energies, MDPI, vol. 14(22), pages 1-31, November.
    3. Michal Frivaldsky & Slavomir Kascak & Jan Morgos & Michal Prazenica, 2020. "From Non-Modular to Modular Concept of Bidirectional Buck/Boost Converter for Microgrid Applications," Energies, MDPI, vol. 13(12), pages 1-23, June.
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