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The following topics are dealt with: DC-AC converters; DC-DC converters; adjustable speed motor drive control; fuel cell systems; energy storage systems; lighting systems; power electronics; renewable energy harvesting; power quality enhancement; fault management; passive components; soft switched power converters; inverters; and vehicular electronics.
THIS paper explores opportunities and challenges in power conversion in the VHF frequency range of 30-300 MHz. The scaling of magnetic component size with frequency is investigated, and it is shown that substantial miniaturization is possible with increased frequencies even considering material and heat transfer limitations. Likewise, dramatic frequency increases are possible with existing and emerging...
Engineering students from Mississippi State University have successfully competed in a four-year competition among 17 universities throughout North America, Challenge X: Crossover to Sustainable Mobility. With headline sponsorship by the U.S. Department of Energy and General Motors, a Chevrolet Equinox was re-engineered to improve fuel economy, reduce emissions, and increase performance. The competition...
In the last decade there has been a tremendous growth in the number of data centers due to the increasing demand for Internet services. At the same time, the cost for energy and materials have increased because of reducing resources and increased demand. That has caused a change in the driving forces for new power supply development, with more consideration on power density and efficiency. The commonly...
This paper presents the control structure for a novel three-port converter topology. This topology has the advantage of low switch count, high power density, high efficiency, so it is a valuable choice for space applications. The three port converter for space application interfaces one solar panel input port, one bi-directional battery port and an isolated output port. Lithium-Ion battery charge...
A new simple and low cost method for paralleling multiple power stages in high-power high-gain isolated full-bridge boost converters is presented. A small current balancing transformer and serial connection of transformer secondary windings provides ideal current sharing between paralleled power stages. Effective and safe parallel operation of multiple switching stages can thus be performed. By splitting...
A new interleaved active-clamp forward converter with parallel input and series-parallel output is proposed in this paper. With the proposed topology the secondary windings of the transformers work in series when the input voltage is low but in parallel when the input voltage is high. Therefore, the duty cycle is not limited within 0.5 and the steady state conversion gain of the converter can be improved...
This paper begins by illustrating the issue of switch stresses on synchronous rectifiers (SRs) which happens during the hot plug-in and plug-out operation turn on and off moment of the synchronous rectification in isolated non-regulated Dc-Dc converters, such as the single stage unregulated bus converter. Next, full analysis of the working principle of this unfavorable phenomenon is presented theoretically...
A novel high efficiency polymorphic topology converter whose input range extends to 200~800 Vdc, while the high line input efficiency is still maintained is presented in this paper. By integrated a novel three-level HB L2C converter and a conventional PSFB converter together, the proposed converter intelligently estimate the input voltage condition and automatically change its internal topology forms...
Burst mode control is applied to improve light load efficiency of LLC converter in this paper. Detailed analysis on characteristic and operation processes of LLC burst mode control with SR is presented. Based on the analysis, some important rules of LLC burst mode control are proposed, which is the key to achieve high light load efficiency. The rules include: the suitable primary and secondary driving...
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