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This paper proposes an ultracapacitor (UC)-battery hybrid energy storage system (HESS) for electric vehicle based on asymmetric bidirectional Z-source topology. Compared with the conventional two-stage design, the HESS can be incorporated into the traction inverter system, leading to better performance and lower cost. The UC energy can be effectively utilized due to the buck/boost characteristic in...
In this study, a novel multi-level type bidirectional half-bridge inverter for wireless power transfer applications is presented. The proposed converter provides high power application by splitting the voltage in each switch. The converter topology is explored to reveal the maximum efficiency points with a variable phase-shift function between the dual active level (DAL) switches. The analysis of...
In this study, analysis of a bi-directional half-bridge inverter for wireless power transfer applications is realized. The presented converter topology is explored to reveal the maximum efficiency points with a variable phase shift function between the dual active bridge (DAB) switches. The examination of the converter is provided in terms of variable load and coupling co-efficient factor at a constant...
In this paper, recent topologies for bi-directional AC-DC converters are reviewed. The reviewed topologies are efficient, isolated and compact and can be used as an on-board battery charger for EV or HEV. It is assumed that each converter is made up of a set of building blocks and choice of these building blocks results in different topologies. The topologies are divided into two families: single-stage...
For Inductive Power Transfer (IPT) system, the bi-directional power transfer mode is designed for energy feedback from receiver to transmitter. It will be helpful to improve system efficiency in high power application. In order to realize power flow from low voltage side to high voltage side, the paper gives voltage gain analysis method. On the basis, aiming at the power flow control, the paper proposes...
So far, the operating characteristics of asymmetry type current resonant converter as LLC converter are discussed in detail. However, the detail operating characteristics discussions of symmetry type resonant converter have not been carried out. This paper investigates the AC characteristics of symmetry type bi-directional current resonant converter, and their soft-switching regions are also investigated.
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