This paper develops a railway power module with wide range voltage (dc 60—dc 160 V) input and constant output (24 V/10 A) . The adopts two-stage topology structure to realize conversion. Use the most advanced GaN (gallium nitride) as main switching devices. first stage circuit architecture uses two-phase interleaved buck converter convert into intermediate bus (48 through closed-loop control, t...

Integrated modular motor drives (IMMDs) have a compact and high fault-tolerant structure compared to their conventional counterparts. The most challenging issue in the implementation of these is thermal management inverter modules due small space available for each module its physical proximity machine windings with heat production. electrothermal design discrete half-bridge radially stator-mou...

Single-Stage transformerless AC/DC converter received much attention in the universal line application. Unlike the existing converters a new high step-down transformerless single-stage single-switch AC/DC converter is proposed. The topology integrates a buck-buck-boost converter with low intermediate bus and output voltage. The converter utilizes a buck converter as a PFC cell and buck-boost co...

In this work we describe a dialog system developed into the DIHANA project. This system consists of seven modules: an automatic speech recognizer, a language understanding module, a dialog manager, a module that manages the queries to the database, a natural language answer generator, a text-to-speech converter and, finally, a central communication manager. For the implementation of the system,...

AbsfructA fully integrated bridge-output-to-frequency converter has been realized as signal-conditioning circuitry for a onechip smart thermal maskflow sensor. The frequency converter reads out four separate mistor bridges of the air-flow sensor in order to realize high sensitivity and direftional flow measurement over the fd angle range of 360". The converter selects the sensor bridges individ...

The here presented work reports on incorporation of a core grammar of Greek Sign Language (GSL) into a Greek to GSL conversion tool. The output of conversion feeds a signing avatar, enabling dynamic sign synthesis. Efficient conversion is of significant importance in order to support access to e-content by the Greek deaf community, given that the conversion tool may well be integrated into vari...

Researchers and scholars have been attracted by the idea of using integrated writing task along with independent writing task to best assess the EFL learners’ writing competence. This study was conducted to compare the writing performance of EFL students in integrated and independent writing tasks. It also aimed to find out if writing performance varies with task types. A number of thirty Irani...

An optical probe current sensor module using the Kerr effect of exchange-coupled magnetic film has been fabricated and applied to switching current measurements for IGBT used for the DC-DC converter and the DC-AC inverter of EV/HEV. Since the sensor module using the Kerr effect of the single domain exchange-coupled magnetic film utilizes magnetization rotation only, Barkhausen noise due to doma...

This paper represents a modified LCL-T (inductor inductor capacitor) series parallel resonant converter (SPRC) has been mathematically modeled and validated. The limitations of two element resonant topologies have been removed by adding a third reactive element. The study indicates the mathematical modeling and design of LCL-T SPRC. The proposed approach is expected to provide better voltage re...

Researchers and scholars have been attracted by the idea of using integrated writing task along with independent writing task to best assess the EFL learners’ writing competence. This study was conducted to compare the writing performance of EFL students in integrated and independent writing tasks. It also aimed to find out if writing performance varies with task types. A number of thirty Irani...