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Energies 2018, 11(12), 3428; https://doi.org/10.3390/en11123428

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

1
School of Electrical and Information, Northeast Agricultural University, Harbin 150030, China
2
School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
3
School of Electrical Engineering, Southeast University, Nanjing 210096, China
*
Author to whom correspondence should be addressed.
Received: 28 September 2018 / Revised: 20 October 2018 / Accepted: 25 October 2018 / Published: 7 December 2018
(This article belongs to the Section Electrical Power and Energy System)
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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. View Full-Text
Keywords: high step-up voltage gain; coupled inductor; reverse recovery high step-up voltage gain; coupled inductor; reverse recovery
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Gao, Y.; Liu, H.; Ai, J. Novel High Step-Up DC–DC Converter with Three-Winding-Coupled-Inductors and Its Derivatives for a Distributed Generation System. Energies 2018, 11, 3428.

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