Unified modulation for three-phase current-fed bidirectional dc-dc converter under varied input voltage

Abstract

In this paper, a new three-phase current-fed bidirectional dc-dc converter is proposed. The topology integrates a three-phase boost converter with a three-phase galvanically isolated bidirectional dc-dc converter. Keeping dc bus voltage constant allows high efficient energy conversion over a wide input voltage and maintains ZVS conditions in the whole operation range. By using compact small inductance dc inductors the ZVS conditions can be improved in low power range and the switching losses of the lower switches are reduced. At the same time the input current ripple can be alleviated by three-phase interleaved structure. Finally, a 6-kW hardware prototype is constructed and tested. The experimental results verify it can maintain high efficiency over wide input voltage and power range. I.978-1-4244-4783-1/10/$25.00 ©2010 IEEE

Integrated MPPT and bidirectional battery charger for PV application using one multiphase interleaved three-port dc-dc converter

“…The soft switching condition for 2 port current-fed DAB converter has been analyzed in [14]. For three-port converter, the switches can also satisfy the ZVS conditions if small dc inductors are utilized and the voltages on both sides of the transformer are matched.…”

“…1 shows the topology of multiphase interleaved threeport dc-dc converter. This converter was proposed in [14] with detailed description of open-loop operation principle. In this paper, this converter is applied to grid-interactive PV system to achieve integrated MPPT and bidirectional battery charge/discharge function.…”

Design and Control of a Modular 48/400V Power Converter for the Grid Integration of Energy Storage Systems

“…2. The first stage, based in an ISR, is similar to the one presented in [5], but removing the integration of the first-stage for an improved system modularity. As commented before, the proposed approach also allows to easy increase the input current capability by adding extra parallel legs.…”

“…For this paper, the modelling, design and control of a modular 48/400 V, 18 kW bidirectional DC/DC converter is proposed. The design is able to deal with a high-transformation ratio and high power density, [4], [5]. The designed power converter could be easily combined with others in order to increase the output voltage and/or current.…”

Study of Bidirectional DC-DC Converter Interfacing Energy Storage for Vehicle Power Management Using Real Time Digital Simulator (RTDS)

“…Therefore the dynamic model of dc-dc converter is studied in this paper since it will affect the power train control system design. The topology, including the transformer design, as well as the bidirectional control loop of dc-dc converter can be found in [22], [23].…”