ABSTRACT

A VHDL-based description of a DC-DC boost converter is here presented. Starting from description of simple functional blocks such as voltage dividers, comparators and function's generators, more complex DC-DC step-up voltage converter was modeled by adopting a structural description of previous blocks. The proposed VHDL modeling can be used to simulate complex digital circuits which includes a few of analog parts (e.g., memory ....etc

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Abstract—

This paper proposes a new soft-switched continuousconduction- mode (CCM) boost converter suitable for high-power applications such as power factor correction, hybrid electric vehicles, and fuel cell power conversion systems. The proposed converter achieves zero-voltage-switched (ZVS) turn-on of active switches in CCM and zero-current-switched turn-off of diodes leading to negligible reverse-recovery loss. The components’ voltage ratings and energy volumes of passive components of the proposed converter are greatly reduce ....etc

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A buck“boost transformer is a autotransformer used to make small adjustments to the voltage applied to alternating current equipment. Buck“boost connections are used in several places such as un interruptible power supply (UPS) units for computers in the tanning bed industry. Operating electrical equipment at other than its designed voltage may result in poor performance, short operating life, or possibly overheating and damage.For large adjustments in voltage (more than 15% to 20%), usually a two-winding transformer is used with t ....etc

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A Multiple-Input Dc-Dc Positive Buck-Boost Converter Topology

Abstract-
A new multiple-input hybrid energy conversion topology is presented. The proposed topology is capable of combining different energy sources with different voltage-current characteristics, while achieving low part number and bi-directional operational. Compare to previous multiple-input buck-boost converter, the proposed topology provides positive output voltage; it is capable of bi-directional operation; and it has the capability of operating in buck, boost, and buc ....etc

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Abstract
Two major factors that limit the throughput inmulti-hop wireless networks are the unreliability of wirelesstransmissions and co-channel interference. One promising techniquethat combats lossy wireless transmissions is opportunisticrouting (OR). OR involves multiple forwarding candidates torelay packets by taking advantage of the broadcast nature andspacial diversity of the wireless medium. Furthermore, recentadvances in multi-radio multi-channel transmission technologyallows more concurrent transmissions in the network, and sh ....etc

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high speed protocol processor to boost gateway performance


Abstract
high-speed protocol processor for gateways based on the concept normal data transfer is executed by special-purpose hardware and a general-purpose microprocessor handles abnormal data transfer and connection control. To analyze the quantitative effect of this proposal, a high-speed protocol processor which can execute OSI (open systems interconnection) layers two to four was manufactured, and its performance was measured. The protocol processing time for normal data trans ....etc

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Buck Boost Transformer ....etc

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Buck Boost Transformer



hi... I need the abstract and report for the seminar topic in electrical titled Buck Boost Transformer....
I hope for the reply from you soon.... I need this for my seminar presentation..

Regards

Akbar ....etc

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Abstract
With the increase of usage of wireless networks for purposes where the nodes are either stationary or minimally mobile, focus is also on increasing the network capacity of wireless networks. One such way is to use non-overlapping multiple channels provided by 802.11 by using multiple interfaces per node. Multiple nonoverlapped channels exist in the 2.4GHz and 5GHz spectrum. However, most IEEE 802.11-based multihop ad hoc networks today use only a single channel. As a result, these networks rarely can fully exploit the aggrega ....etc

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