ASTN (Automatic Switched Transport Network) allows traffic paths to be set up through a switched network automatically. The term ASTN replaces the term ASON (Automatically Switched Optical Network) and is often used interchangeably with GMPLS (Generalized MPLS). This is not completely correct as GMPLS is a family of protocols, but ASON/ASTN is an optical/transport network architecture. The requirements of the ASON/ASTN architecture can be satisfied using GMPLS protocols developed by the IETF or by GMPLS protocols that have been modified by the ....etc

[:=Read Full Message Here=:]

Abstract
A new zero-voltage-switching (ZVS) control approachis presented for pulsewidth modulation (PWM) buck convertersunder discontinuous conduction mode (DCM)/continuousconduction mode (CCM) boundary. This proposed technique compensatesfor control circuit delay, and hence, turns on power MOSat the instant exactly when drain-to-source voltage becomes zero.No complicated timing calculation circuits or additional externalcomponents are required. This proposed integrated ZVS controlcan be applied to other dc–dc converters as well. The ....etc

[:=Read Full Message Here=:]

what is the advantages of circuit switching in packet switching?? plz give me answer

what is the advantages of circuit switching in packet switching?? plz give me answer


....etc

[:=Read Full Message Here=:]

i need to present a seminar which basically consists of wat is a switched capacitor circuit ,wat it is ,how it works and applications etc ....etc

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

ABSTRACT

This paper presents a scheme for designing a kind of wireless charging system aimed to provide power transmission for personal mobile devices such as cell phone. This scheme consists of three parts: wireless power transmission design, wireless signal transmission design and charging manage design. A circular array consisting of some antenna elements is employed in the scheme as transmit access of power and signal. In the supposed indoor condition, the transfer efficiency can up to 66%. The charging manage adopt a close-loop optimal ....etc

[:=Read Full Message Here=:]

SWITCHED RELUCTANCE MOTORS

HISTORY
INVENTED BY DAVIDSON OF SCOTLAND IN 1838
WALKER INVENTED VARIABLE RELUCTANCE MOTOR IN 1920
BEDFORD AND HOFT FILED US PATENTS ON SRM IN 1971
HEWLETT PACKARD- USED SRM IN VOLUME APPLICATION (DRAFTMASTER PLOTTER)

INTRODUCTION
Pple of stepper motor; magn material suspended in magn field align in direction of field due to torque
Basically stepper motor;i.e rotate through fixed angle when input pulse is applied
Speed proportional to pulse frequency; ....etc

[:=Read Full Message Here=:]

Abstract
In this paper, a systematic overview of PLL-based closed-loop control methods for interleaved DCM/CCM boundary boost PFC converters is presented. It is shown that the PLL-based closed-loop methods always provide stable operation, unlike the open-loop control methods, where the only method which results in stable operation is the slave synchronization to the turn-on instant of the master with current-mode control. It is also shown that the dynamic response of the PLL-based closed-loop methods with master-slave approach and dem ....etc

[:=Read Full Message Here=:]

Four-Quadrant Control of Switched Reluctance Motors
Presented By:
Dr. Iqbal Husain
Department of Electrical Engineering
The University of Akron
Akron, OH 44325-3904
Introduction Switched reluctance motor (SRM) drives are simpler in construction compared to induction and synchronous types of machine. Their combination with power electronic controllers may yield an economical solution. The switched reluctance motor with passive rotor has a simple construction, but the solution of its mathematical model is rela ....etc

[:=Read Full Message Here=:]

The Switched Reluctance Generator for Wind Power Conversion

The use of wind energy has become increasingly important as a renewable energy source, so there is an increasing interest in exploiting it using a Switched Reluctance Machine (SRM).

Introduction

In the last decades, the SRM serves as an important alternative in various applications both within the industrial and domestic markets, as a motor showing good mechanical reliability, high torque-volume ratio and high efficiency,and it is of low cost.Eventhough SRM is easy to build ....etc

[:=Read Full Message Here=:]