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This paper presents a novel structure of high step-up DC/DC converters intended for distributed generation systems such as fuel cells and photovoltaic (PV) systems. Proposed topologies integrate the classical Y-source impedance network with different step-up cells to acquire strong boost ability which is unmatched by existing impedance networks. Compared to Y-source, proposed converters reserve versatile...
This paper presents two configurations of dual-input (DI) or three-port (TPC) isolated dc-dc converters for hybrid renewable energy systems such as photovoltaics and batteries. These two converters are derived by integrating an interleaved boost converter and a single-active bridge converter with an ac inductor as a power interfacing element or phase-shift soft-switching converter with an output dc...
The grid-connected systems employing Photovoltaic and fuel cells call for high step-up dc/dc topologies. Large voltage conversion ratio with ten times of voltage gain is essential for the front-end dc/dc converters. In this paper, the built-in transformer multiplier cell is inserted into each phase of the conventional interleaved boost converter. The multiplier cell is composed by the built-in transformer...
This paper introduces a new single-switch nonisolated dc-dc converter with very high voltage transfer ratio and reduced semiconductor voltage stress. The converter utilizes an integrated autotransformer and a coupled inductor on the same core to achieve a high step-up voltage gain without extreme duty cycle. Further, an integrated passive regenerative circuit recycles the leakage energy of the coupled...
In this paper, a novel DC-DC converter topology that provides very high gain at high power rating is presented. The proposed DC-DC converter is obtained by combining interleaved boost converter (IBC), coupled inductor and switched capacitor. Voltage gain expression and design equations of the proposed converter are derived. The operational modes, characteristic waveforms and the design details of...
A new interleaved active-clamp forward converter with parallel input and series-parallel output is proposed in this paper. With the proposed topology the secondary windings of the transformers work in series when the input voltage is low but in parallel when the input voltage is high. Therefore, the duty cycle is not limited within 0.5 and the steady state conversion gain of the converter can be improved...
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