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 and Yi-Ping Hsieh
Additional contact information
Yong-Seng Wong: Department of Electrical Engineering, National Cheng Kung University, No. 1 University Road, Tainan 701, Taiwan
Jiann-Fuh Chen: Department of Electrical Engineering, National Cheng Kung University, No. 1 University Road, Tainan 701, Taiwan
Kuo-Bin Liu: Power Supply Group, National Synchrotron Radiation Research Center, 101, Hsin-Ann Road, Hsinchu 300, Taiwan
Yi-Ping Hsieh: Mission Critical Infrastructure Solutions Business Unit, Delta Electronics INC, 39 Section 2, Huan-dong Road, Shanhua Township, Tainan 741, Taiwan

Energies, 2017, vol. 10, issue 3, 1-17

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 V o (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 150 W was constructed in a laboratory; the maximum efficiency was almost 96.2%.

Keywords: high voltage gain; switch-clamp capacitor; power generation; energy conversion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (9)

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