نتایج جستجو برای: matrix convertors
تعداد نتایج: 364823 فیلتر نتایج به سال:
Abstract A novel trend in the theory of thermodynamic limits for energy convertors and traditional heat & mass exchangers is analysed where certain special controls called the Carnot control variables play a common role. In terms of these controls an expression for the lost work has the same form in irreversible energy convertors and in traditional processes of purely dissipative transport. For...
A critical survey has been conducted on high energy-efficient bidirectional converters, various topologies that effectively meet the automated vehicle requirements, and 24 GHz/77 GHz low-profile antennas (for automotive radar applications). The present identified into two parts current topic of study as perspectives challenges. Part 1 this covers power electronic convertor condition monitoring ...
All optical wavelength conversion is essential in present day optical networks for transparent interoperability, contention resolution, and wavelength routing. The incorporation of all optical wavelength convertors leads to better utilization of the network resources and hence improves the efficiency of optical networks. Wavelength convertors that can work with Dispersion Managed (DM) solitons ...
In this study, two types of multilevel convertors, cascaded multilevel inverter with separate DC sources and diode clamped multilevel inverter with common DC source are modeled and compared in the case of feeding of an induction motor. Here, SHEPWM technique is used as the switching strategy. Also a new variable torque feedback control on modulation index is presented, to preserve the induction...
Development and utilization of wind energy has become an important part of world sustainable energy development strategy. A control method realizing maximum power point tracking of wind turbine through adjusting the load characteristics was proposed in this article. The power management system based on DC/DC convertors was designed. The maximum power point tracker (MPPT) extracts maximum power ...
INTRODUCTION Asymptomatic persons infected with the parasites causing visceral leishmaniasis (VL) usually outnumber clinically apparent cases by a ratio of 4-10 to 1. We assessed the risk of progression from infection to disease as a function of DAT and rK39 serological titers. METHODS We used available data on four cohorts from villages in India and Nepal that are highly endemic for Leishman...
Real-time digital systems and asynchronous computer systems have an inherent risk of occasional failures due to metastability in various components used to control data-transfers. This possibility has been known for a long time, although it is sometimes forgotten or overlooked. There is renewed interest in asynchronous computer systems because of the prospects they offer for lower power operati...
Concepts for possible use of high temperature superconductors in millimeter/submillimeter wave cavities, mode convertors and waveguides are described. Reduction of the ohmic loss in the cavities could remove a major constraint on the power produced by high frequency gyrotrons. Significant benefits could be obtained without the need for ultra high values of cavity Q. Improved mode convertor perf...
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