Design and Implementation Procedure of a High-Gain Three-Input Step-Up 1kW Converter

Edgardo Netzahuatl; Leobardo Hernandez-Gonzalez; Domingo Cortes; Jazmin Ramirez-Hernandez

Working Paper Article Version 1 This version is not peer-reviewed

Version 1 : Received: 11 January 2021 / Approved: 12 January 2021 / Online: 12 January 2021 (15:24:40 CET)

The use of different sources to energize a load is convenient in many applications, particularly those where two or more renewable energy sources are employed as: energy harvesting, hybrid vehicles, and off-grid systems. In these cases, a multi-input converter able to admit sources with different characteristics and, if necessary, select the output power of each source. Several topologies of multi-input converters have been proposed to this aim, however, most of them are based on multi-stage designs, which decreases efficiency and increases control complexity, particularly when more than two sources are used. In this work, a three-input step-up converter easy to control in open loop condition is analyzed. A designed procedure is described, and experimental results are presented for a 1 kW power converter. The implemented converter results in a higher voltage gain, less storage element keeping high efficiency compared to similar topologies. Using the procedure here proposed, this converter that was initially proposed for photovoltaic applications is enabled to be used in medium and high-power applications, for example when renewable energy sources are used.

Multi-output converter; DC-DC converter; Boost converter; Renewable energy

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Design and Implementation Procedure of a High-Gain Three-Input Step-Up 1kW Converter

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