A novel high step-up DC-DC converter with coupled inductor and switched clamp capacitor techniques for photovoltaic systems

Yong Seng Wong, Jiann-Fuh Chen, Kuo Bin Liu, Yi Ping Hsieh

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In this study, a novel high step-up DC-DC converter was successfully integrated using coupled inductor and switched capacitor techniques. High step-up DC-DC gain was achieved using a coupled inductor when capacitors charged and discharged energy, respectively. In addition, energy was recovered from the leakage inductance of the coupled inductor by using a passive clamp circuit. Therefore, the voltage stress of the main power switch was almost reduced to 1/7 Vo (output voltage). Moreover, the coupled inductor alleviated the reverse-recovery problem of the diode. The proposed circuit efficiency can be further improved and high voltage gain can be achieved. The operation principle and steady-state analysis of the proposed converter were discussed. Finally, a hardware prototype circuit with input voltage of 24 V, output voltage of up to 400 V, and maximum power of 150W was constructed in a laboratory; the maximum efficiency was almost 96.2%.

Original languageEnglish
Article number378
JournalEnergies
Volume10
Issue number3
DOIs
Publication statusPublished - 2017 Jan 1

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

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