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Wide Range Series Resonant DC-DC Converter with a Reduced Component Count and Capacitor Voltage Stress for Distributed Generation

Author

Listed:
  • Abualkasim Bakeer

    (Power Electronics Group, Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
    Electrical Engineering Department, Faculty of Engineering, Aswan University, Aswan 81542, Egypt)

  • Andrii Chub

    (Power Electronics Group, Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia)

  • Andrei Blinov

    (Power Electronics Group, Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia)

  • Jih-Sheng Lai

    (Future Energy Electronics Center (FEEC), Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA)

Abstract

This paper proposes a galvanically isolated dc-dc converter that can regulate the input voltage in a wide range. It is based on the series resonance dc-dc converter (SRC) topology and a novel boost rectifier. The proposed topology has a smaller number of semiconductors than its SRC-based existing topologies employing an ac-switch in the boost rectifier. The proposed dc-dc converter comprises only two diodes and one switch at the output side, while the existing solutions use two switches and two diodes to step up the voltage. The proposed converter boosts the input voltage within a single boosting interval in the positive half-cycle of the switching period. In addition, the resonant current in the negative half-cycle is sinusoidal, which could enhance the converter efficiency. The resonant capacitor voltage is clamped at the level of the output voltage. Therefore, the voltage stress of the capacitor could significantly reduce at various input voltage and power levels. This makes it perfect for distributed generation applications such as photovoltaics with wide variations of input voltage and power. The converter operates at the fixed switching frequency close to the resonance frequency to obtain the maximum efficiency at the nominal input voltage. The zero-voltage switching (ZVS) feature is achieved in the primary semiconductors, while the diodes in the output-side rectifier turn off at nearly zero current switching. The mathematical model and design guidelines of the proposed converter are discussed in the paper. The experimental results confirmed the theoretical analysis based on a 300 W prototype. The maximum efficiency of the converter was 96.8% at the nominal input voltage, and the converter has achieved a wider input voltage regulation range than that with the boosting cell comprising an ac-switch.

Suggested Citation

  • Abualkasim Bakeer & Andrii Chub & Andrei Blinov & Jih-Sheng Lai, 2021. "Wide Range Series Resonant DC-DC Converter with a Reduced Component Count and Capacitor Voltage Stress for Distributed Generation," Energies, MDPI, vol. 14(8), pages 1-20, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:8:p:2051-:d:531881
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    References listed on IDEAS

    as
    1. Abualkasim Bakeer & Andrii Chub & Dmitri Vinnikov, 2020. "Step-Up Series Resonant DC–DC Converter with Bidirectional-Switch-Based Boost Rectifier for Wide Input Voltage Range Photovoltaic Applications," Energies, MDPI, vol. 13(14), pages 1-14, July.
    2. Comello, Stephen & Reichelstein, Stefan J. & Sahoo, Anshuman, 2018. "The Road ahead for Solar PV Power," Research Papers 3620, Stanford University, Graduate School of Business.
    3. Abualkasim Bakeer & Andrii Chub & Dmitri Vinnikov & Argo Rosin, 2020. "Wide Input Voltage Range Operation of the Series Resonant DC-DC Converter with Bridgeless Boost Rectifier," Energies, MDPI, vol. 13(16), pages 1-18, August.
    4. Comello, Stephen & Reichelstein, Stefan & Sahoo, Anshuman, 2018. "The road ahead for solar PV power," Renewable and Sustainable Energy Reviews, Elsevier, vol. 92(C), pages 744-756.
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