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Double LCC compensation resonant converter is effectively applicable to inductively coupled energy transfer, for the advantages of perfect symmetry and simple design. However, the system gain characteristics and output characteristics of the circuit overall structure were ignored in the previous study of double LCC compensation converter. In this paper, impedance analysis method is used to determine...
Silicon carbide (SiC) MOSFET is a new type of high voltage power switching device, featuring by low on-state resistance and fast switching speed. In recent years, it has received extensive research and application due to its prominent advantages of high temperature and high frequency, the comparisons and analysis of switching characteristic of SiC MOSFET and traditional silicon (Si) MOSFET is of great...
With the development and wide use of the EV (electric vehicle), the subject of the loosely coupled transformer has become an important topic in the ICPT (inductively coupled power transfer) system. In this paper, the loosely coupled transformer in the ICPT system was modeled, and permeability material of the flat spiral coil structure was analyzed and optimized for the small and medium-sized electric...
Phase-shifted full-bridge ZVS converter has been widely used in high power application as a result of high efficiency and ease of control. Since high voltage stress through rectifier diodes, snubber circuit is needed to ensure performance of the system. Therefore, converter with RC snubber circuit in some cases becomes third-order unstable system, which leads to resonance close to switching frequency...
The conversion between DC and AC power will typically introduce a low-frequency pulsation power in the DC side of single phase power converter which may create instability, lowers its efficiency, and reduces the reliability. In this paper, a novel Power Decoupling Modular (PDM) with 2 series differential decoupling capacitors at the ac side is proposed. Compared with the DC PDM, the proposed modular...
A 50-Hz rotating (annular-mode) gliding arc plasma in a vortex air flow is generated. Its dynamic evolution has been investigated through the electrical measurements and high-speed imaging, which shows that the arc is formed after several breakdowns of the gas and then glides stably with a low-discharge current. The intensity of the light emitting from the arc root at the cathode is remarkably higher...
Titanium dioxide (TiO2) films, because of their special properties, have been studied extensively as semiconductor photocatalyst for solar energy conversion and purification of water and air. Plasma CVD is highly efficient for depositing TiO2 films, but it has mainly been low pressure incorporated with sophisticated discharge and vacuum systems that have been adopted. Thus, in recent years, atmospheric-pressure...
Supported gold (Au) nanocatalysts have attracted much attention due to their high activities in CO oxidation at low-temperature. While the deactivation of gold catalysts during the reaction limits their practical use. Two major reasons for the deactivation were put forward and accepted in general, i.e. agglomeration of gold particles and accumulation of carbonate-like species1,2. The agglomeration...
In order to master the extent of the running insulator contamination and analyze the influence of the environmental factors on the external electrical characteristics of different insulators, in this paper, by selecting leakage current peak, virtual value of leakage current, leakage current pulses and environmental temperature and humidity and something related as the parameters, introduce a kind...
In recent years, the proportion of under-ground cables in power gird has increased. More and more overhead - underground hybrid lines have come out. It is necessary to do further research on the problem that whether auto-reclosure should be put into operation on overhead-underground hybrid lines. In this paper, the phase matrices of overhead- underground hybrid lines are derived at first, then the...
Distributed applications are increasingly being built by Web services. This paper explores a dynamic service execution technique on virtual machines to exploit parallelism of service-based applications. The Dynamic service execution technique is able to determine data dependence of service invocations at run-time and executes independent service invocations concurrently with the help of stateless...
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