Novel High Step-Up DC–DC Converter with Three-Winding-Coupled-Inductors and Its Derivatives for a Distributed Generation System

Yanying Gao, Hongchen Liu and Jian Ai
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Yanying Gao: School of Electrical and Information, Northeast Agricultural University, Harbin 150030, China
Hongchen Liu: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Jian Ai: School of Electrical Engineering, Southeast University, Nanjing 210096, China

Energies, 2018, vol. 11, issue 12, 1-12

Abstract: A novel step-up DC-DC converter with a three-winding-coupled-inductor which integrates a coupled-inductor and voltage-boost techniques for a distributed generation system is proposed in this paper. The two windings of the dotted terminal connection are charged by the input source; the proposed converter utilized smaller turn ratios, and can achieve higher gain when the active switch is turned on. The passive lossless clamped circuits not only can absorb the leakage energy, but also lower the switch voltage stresses; additionally, the reverse-recovery problem of diodes can be reduced to improve the system efficiency. Furthermore, the voltage stress of the output capacitor is reduced. The operating principle and corresponding theoretical analyses are discussed in detail. Finally, an experimental prototype with 50 kHz switching frequency, 40 V input voltage, 380 V output voltage and 400 W output power is set up to verify the validity of the proposed converter.

Keywords: high step-up voltage gain; coupled inductor; reverse recovery (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: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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