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This paper presents a comparison study of three isolated DC/DC circuit topologies, LLC resonant circuit, phase shift bridge circuit and phase shift quasi switched capacitor (QSC) circuit. The device stress of three circuits is compared using total switching device power (SDP) which can be used as an indicator of circuit efficiency, device cooling requirement, device packaging requirement and cost...
In this paper, a family of bidirectional dual-input dc/dc converters is proposed to combine a photovoltaic system and battery energy storage system. This family of converters utilizes a full-bridge, or half-bridge current-source circuit, as the primary side, and a quasi-switched-capacitor circuit as the secondary side. Depending on the power level of the primary side and voltage level of the battery,...
This paper introduces a high step-up ratio isolated dc-dc circuit which can be used as an interface between 20 V-40 V PV panels and high voltage dc system, up to 1000 V. By combining the switched inductor (SL) and quasi switched capacitor (QSC) structures with the traditional isolated full bridge circuit, the 50 times boost ratio is realized with small turns ratio. In this case, the leakage inductance...
In this paper, a family of bidirectional dual-input dc/dc converters is proposed to combine the Photovoltaic (PV) system with the Energy Storage System (ESS). This family of converters utilizes a full-bridge or half-bridge current-source circuit as the primary side, and the Quasi-Switched-Capacitor circuit as the secondary side. Depending on the power level of the primary side and voltage level of...
It is very important to do real-time bridge's health monitoring and have a long time continual analysis and evaluation for the field status of the bridge. In order to make bridges monitoring more sufficient and intelligent, and reduce the cost of monitoring and maintenance of the multiple bridges, it is a new way to implement loosely coupled and distributed monitoring for all the bridges in one city...
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