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Bidirectional dc-dc converter is an important part of battery energy storage to efficiently control the power flow in or out of the battery. Due to the limited stored energy, it is very important to maximize the amount of deliverable energy to the load by minimizing the losses in the power conversion. In this paper, the proposed high efficiency bidirectional DC-DC converter is based on series resonant...
This paper presents present a study and implementation of a three-level boost converter. This converter feature includes low devices voltages stress requirement for high voltage application, small inductor size that leads to the reduction of cost and size and can be operated with a wide range input voltage. Unlike conventional method, output capacitor voltage balancing was done by a slight phase shift...
The charge unbalancing decreases the total storage capacity and the entire life cycle of batteries. In order to prevent the charge differences among cells, cell balancing system or charge equalization have been proposed. This paper proposes an active balancing system based on switched-capacitor charge equalization for series-connected batteries. This circuit topology allows two series-connected cells...
This paper proposes a new control algorithm to improve the defect of the cited interleaved twin-buck converter in the literature. The algorithm can adjust the voltage gain by modulation the duty cycle. And by asymmetrically phase-shift the turn-on periods of the two actives switches, i.e. partially overlapping the turn-on intervals, one of the active switch can benefit from zero-voltage switching...
This paper proposes a novel battery-balancing mechanism. By modular and decentralized design, this balance circuit can be easily expanded for higher-voltage battery strings. Bidirectional flyback converter is applied to transfer the energy from and back to the connected battery module. A capacitor is placed on the common paralleled secondary side to serve as an energy buffer. Average string voltage...
In this paper, a 500 W, 400 V to 48 wireless power transfer system for vehicle battery charging is analyzed, designed and implemented. Series-series resonant topology is used due to ease of analyze and control. The secondary bridge rectifier is replaced by a sync rectifier consists of four MOSFET in a full bridge configuration in order to reduce conduction losses on rectifier. An efficiency of 92...
This paper presents a Zero-Voltage-Switching (ZVS) technique eliminating the switching loss on a proposed single phase bi-directional full-bridge Buck inverter in which asymmetrical filter topology and control scheme are for each arm. Here Metal-Oxide-Field-Effect-Transistor(MOSFET) is chosen as the switching device, an L1-C1 filter is connected across the full-bridge, an L2 filter is connected in...
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