Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Power Flow Control of Four Channel Resonant Step-Down Converters

  • Litvani, Lilla (Dept. of Automation and Applied Informatics, Budapest University of Technology and Economics) ;
  • Hamar, Janos (Dept. of Automation and Applied Informatics, Budapest University of Technology and Economics)
  • Received : 2019.02.06
  • Accepted : 2019.06.27
  • Published : 2019.11.20
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Abstract

This paper proposes a new power flow control method for soft-switched, four channel, five level resonant buck dc-dc converters. These converters have two input channels, which can be supplied from sources with identical or different voltages, and four output channels with arbitrary output voltages. They are specially designed to supply multilevel inverters. The design methodology for their power flow control has been developed considering a general case when the input voltages, output voltages and loads can be asymmetrical. A special emphasize is paid to the limitations and restrictions of operation. The theoretical studies are confirmed by numerical simulations and laboratory tests carried out at various operation points. Exploiting the advantages of the newly proposed power control strategy, the converter can supply five level inverters in dc microgrids, active filters, power factor correctors and electric drives. They can also play an interfacing role in renewable energy systems.

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References

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