This paper proposes a multi‐port DC–DC converter consisting of three input ports and two output ports extendable to three. The converter is designed based on quadratic boost converter, a technique for bidirectional port, an auxiliary source and two output ports with opposite polarities. Designed method of the configuration makes it suitable for multi‐applications with flexible operations. Connection of the converter to a bipolar system is possible due to opposite polarities of output ports. In addition, output voltage can be doubled by series connection between the two out ports and it is introduced as the third output port of the converter. The other advantages of the converter are its appropriate voltage gain, performance in stand‐alone mode with storage port and possibility of boosting voltage with similar voltage gains in different operation modes. To validate feasibility of the converter and investigate coordination of its performance with theory, a prototype is prepared for 120 W output power.
This paper presents a three‐port DC‐DC converter for photovoltaic (PV)/battery stand‐alone systems. The converter is designed by an effective combination of quadratic boost converter and a bidirectional port with low number of components. The converter performance consists of four operation modes with similar voltage gains, which improve reliability of the converter in comparison with the reviewed converters. Battery‐alone mode is performed in the proposed configuration for the times input power of PV is equal to zero. Main advantages of the converter include its common grounded ports, operation with high voltage gain, current continuous of the input ports, utilizing low number of switch to perform four essential operation modes, and its high‐efficiency performance due to low number of used components. Three switches of the structure enable it to control input power of main source and output voltage with two duty cycles per the modes. This number of switches in a three‐port converter requires simpler driving and control systems in comparison with some of the previous presented three‐port converters. The converter is analyzed, and its main equations are obtained. To validate feasibility of the converter and investigate coordination of its performance with theory, a prototype is prepared for 120 W output power.
This paper presents an ultrahigh step‐up converter with combination of a quadratic boost converter, a multiplier cell, and a three windings coupled inductor. Main advantages of the converter include its high voltage gain, low voltage stress on the switch and most of the diodes, continuity of input current with low ripple, and existence of a common ground between the source and load. Furthermore, requiring small inductors leads to high efficiency performance of the converter. To confirm superiority of the proposed converter, it has been compared with the converters consisting coupled inductors. Analysis of the converter has been performed for its main operation modes to validate its quality and quantity factors. A prototype is built in order to experiment its performance per different conditions and evaluate the analysis. Rated values per the experiments are 25, 500, and 200 W for the input voltage, output voltage, and output power, respectively.
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