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This paper presents a novel 400 to 12 V isolated bidirectional dc–dc converter based on a phase-shift-controlled-modified dual-active-bridge power stage. The proposed converter consists of a half-bridge and center tap with active clamp circuit, which has promising performance for low-voltage high-current applications. 650 V gallium-nitride high electron mobility transistors are used on the high voltage...
High conversion efficiency is always desired in energy storage device (ESD). In this work a high efficiency GaN and Si device mixed isolated bidirectional dc-dc converter is proposed in the distributed ESD application. To optimize the efficiency of the bidirectional half-bridge push-pull active clamp converter over a wide input/output voltage and load range, it is necessary to accurately predict the...
GaN devices have emerged as a possible replacement for silicon devices in various power conversion applications and as an enabler of new applications not previously possible. This paper presents a 600V Gallium-Nitride (GaN) device based isolated bidirectional DC-DC converter applied in battery energy storage systems. Apart from the features of low turn-off loss, low output capacitance and low drain-source...
With the commercialization of wide bandgap power devices such as SiC MOSFETs and JBS diodes, power electronics converters used in the harsh environments such as hybrid electric vehicles and aerospace attract more and more attentions. The low loss, high temperature and fast switching capabilities are utilized in the converters to improve the power density and efficiency. However, the EMI problem caused...
The charge-trapping characteristics and trap levels of SiOx-based (TaN/SiO2/n++ Si-substrate) resistive switching memory (RS) have been investigated. Multilevel operation under compliance current control is demonstrated and current transport behavior is analyzed using the normalized conductance of low resistive state (LRS) and high resistive state (HRS). Temperature dependence of I-V characteristics...
In this paper, first, a new type of DC/DC converter which is composed by a variable winding DC transformer as its front-end and a back-end converter, which is combined by four buck converters interleaved with a 90 degree phase shift to each other (the output voltage is about 25 V and uncontrolled for there are several batteries connected to it) is designed and produced on the existing wind power testing...
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