Rail Potential Calculation Model for DC Railway Power Supply Equipped with Voltage Limiting Device

Indirect lightning over-voltage is one of the main ways to cause damage to the military power supply. Firstly, the waveform analog and destructive analysis of the lightning current is carried out. And then, the principles and calculation model of indirect lightning over-voltage are studied. According to dipole model the electromagnetic filed distribution laws at the discharge instantly time are acquired. Through the space and time-discrete processing, the numerical solution of electric and magnetic fields is forwarded. Finally, by a large number of simulation tests, the influence laws of lightning location, line length, lightning return stroke speed and termination resistor effect on induced overvoltage is discovered, which provides quantitative indicators to the lightning protection design of the military power supply.

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New replica method with plasma polymerized film by glow discharge

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100104133 ◽

1988 ◽

Vol 46 ◽

pp. 414-415

Author(s):

A. Tanaka ◽

M. Yamaguchi ◽

T. Hirano

Keyword(s):

Power Supply ◽

Plasma Polymerization ◽

Vacuum Chamber ◽

Complex Surface ◽

Replica Method ◽

Metal Extraction ◽

High Voltage Power Supply ◽

Negative Glow ◽

Hydrocarbon Gas ◽

Hydrocarbon Molecules

The plasma polymerization replica method and its apparatus have been devised by Tanaka (1-3). We have published several reports on its application: surface replicas of biological and inorganic specimens, replicas of freeze-fractured tissues and metal-extraction replicas with immunocytochemical markers.The apparatus for plasma polymerization consists of a high voltage power supply, a vacuum chamber containing a hydrocarbon gas (naphthalene, methane, ethylene), and electrodes of an anode disk and a cathode of the specimen base. The surface replication by plasma polymerization in negative glow phase on the cathode was carried out by gassing at 0.05-0.1 Torr and glow discharging at 1.5-3 kV D.C. Ionized hydrocarbon molecules diffused into complex surface configurations and deposited as a three-dimensionally polymerized film of 1050 nm in thickness.The resulting film on the complex surface had uniform thickness and showed no granular texture. Since the film was chemically inert, resistant to heat and mecanically strong, it could be treated with almost any organic or inorganic solvents.

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Power Supply Europe '91 Exhibition Preview

Power Engineering Journal ◽

10.1049/pe:19910034 ◽

1991 ◽

Vol 5 (4) ◽

pp. 153

Keyword(s):

Power Supply

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Discussion on “Magnet power supply for the 7 GeV proton synchrotron Nimrod. Parts 1–3”

Proceedings of the Institution of Electrical Engineers ◽

10.1049/piee.1963.0318 ◽

1963 ◽

Vol 110 (12) ◽

pp. 2233

Keyword(s):

Power Supply ◽

Proton Synchrotron

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A fuzzy neural network approach for modeling the growth kinetics of FeB and Fe2B layers during the boronizing process

Matériaux & Techniques ◽

10.1051/mattech/2019002 ◽

2018 ◽

Vol 106 (6) ◽

pp. 603 ◽

Cited By ~ 2

Author(s):

Bendaoud Mebarek ◽

Mourad Keddam

Keyword(s):

Neural Network ◽

Experimental Data ◽

Fuzzy Neural Network ◽

Treatment Time ◽

Calculation Model ◽

Average Error ◽

Network Approach ◽

Neural Network Approach ◽

Fuzzy Neural ◽

Kinetics Of

In this paper, we develop a boronizing process simulation model based on fuzzy neural network (FNN) approach for estimating the thickness of the FeB and Fe2B layers. The model represents a synthesis of two artificial intelligence techniques; the fuzzy logic and the neural network. Characteristics of the fuzzy neural network approach for the modelling of boronizing process are presented in this study. In order to validate the results of our calculation model, we have used the learning base of experimental data of the powder-pack boronizing of Fe-15Cr alloy in the temperature range from 800 to 1050 °C and for a treatment time ranging from 0.5 to 12 h. The obtained results show that it is possible to estimate the influence of different process parameters. Comparing the results obtained by the artificial neural network to experimental data, the average error generated from the fuzzy neural network was 3% for the FeB layer and 3.5% for the Fe2B layer. The results obtained from the fuzzy neural network approach are in agreement with the experimental data. Finally, the utilization of fuzzy neural network approach is well adapted for the boronizing kinetics of Fe-15Cr alloy.

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Development of the algorithm for the selection of a wind generator-based autonomous power supply system

Power and Autonomous equipment ◽

10.32464/2618-8716-2019-2-1-8-16 ◽

2019 ◽

Vol 2 (1) ◽

pp. 8-16 ◽

Cited By ~ 1

Author(s):

P. A. Khlyupin ◽

G. N. Ispulaeva

Keyword(s):

Wind Turbines ◽

Power Supply ◽

Alternative Energy ◽

Power Supply System ◽

Supply System ◽

Power Generators ◽

Energy Devices ◽

Wind Generator ◽

Alternative Energy Sources ◽

Selection Of

Introduction: The co-authors provide an overview of the main types of wind turbines and power generators installed into wind energy devices, as well as advanced technological solutions. The co-authors have identified the principal strengths and weaknesses of existing wind power generators, if applied as alternative energy sources. The co-authors have proven the need to develop an algorithm for the selection of a wind generator-based autonomous power supply system in the course of designing windmill farms in Russia. Methods: The co-authors have analyzed several types of wind turbines and power generators. Results and discussions: The algorithm for the selection of a wind generator-based autonomous power supply system is presented as a first approximation. Conclusion: The emerging algorithm enables designers to develop an effective wind generator-based autonomous power supply system.

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SISTEM AUTOMATIC SWITCH REDUNDANT UPS UNTUK BEBAN ESSENSIAL

Electro Luceat ◽

10.32531/jelekn.v5i1.144 ◽

2019 ◽

Vol 5 (1) ◽

pp. 35-45

Author(s):

Markus Dwiyanto Tobi ◽

Alimuddin Mappa

Keyword(s):

Power Supply ◽

Working Condition ◽

Control Circuit ◽

Energy Sources ◽

Main Equipment ◽

Telecommunication Equipment ◽

Input Condition ◽

Research Designs ◽

Switch Circuit

The role of the power supply device is to produce, process and distribute energy sources. Telecommunication equipment can only operate if it has continuous supply. Therefore, to maintain the continuity of the supply, a UPS (Uninterruptable Power Supply) device system is needed so that the supply to the Essential Load device will remain available so that continuity will be maintained. This research designs and proposes how a series of automatic redundant switch systems on UPS to ensure the availability of power supply for the main equipment of telecommunications systems. The Auto switch circuit is designed to have 3 (three) working stages which will trigger the relay driver as control circuit, namely the normal working condition of the contactor input K1 is present, the input condition is zero (lost), and the input condition is present. This system can automatically supply power to telecommunications equipment.

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