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Integrated Three-Voltage-Booster DC-DC Converter to Achieve High Voltage Gain with Leakage-Energy Recycling for PV or Fuel-Cell Power Systems

Department of Electronic Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung 82445, Taiwan
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Academic Editor: Gabriele Grandi
Energies 2015, 8(9), 9843-9859; https://doi.org/10.3390/en8099843
Received: 16 July 2015 / Revised: 31 August 2015 / Accepted: 1 September 2015 / Published: 9 September 2015
In this paper, an integrated three-voltage-booster DC-DC (direct current to direct current) converter is proposed to achieve high voltage gain for renewable-energy generation systems. The proposed converter integrates three voltage-boosters into one power stage, which is composed of an active switch, a coupled-inductor, five diodes, and five capacitors. As compared with conventional high step-up converters, it has a lower component count. In addition, the features of leakage-energy recycling and switching loss reduction can be accomplished for conversion efficiency improvement. While the active switch is turned off, the converter can inherently clamp the voltage across power switch and suppress voltage spikes. Moreover, the reverse-recovery currents of all diodes can be alleviated by leakage inductance. A 200 W prototype operating at 100 kHz switching frequency with 36 V input and 400 V output is implemented to verify the theoretical analysis and to demonstrate the feasibility of the proposed high step-up DC-DC converter. View Full-Text
Keywords: PV (photovoltaic) module; fuel cell; high step-up converter; leakage-energy recycling PV (photovoltaic) module; fuel cell; high step-up converter; leakage-energy recycling
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Shen, C.-L.; Chen, H.-Y.; Chiu, P.-C. Integrated Three-Voltage-Booster DC-DC Converter to Achieve High Voltage Gain with Leakage-Energy Recycling for PV or Fuel-Cell Power Systems. Energies 2015, 8, 9843-9859.

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