Results 51 to 60 of about 16,886,585 (187)

Overvoltage Protection for High Frequency High Voltage Power Transformers

open access: yesEletrônica de Potência, 2019
Transformers with high-voltage operation may have undesired behavior due to the effects of their parasitic elements. In power electronics applications, if the primary voltage has harmonics, transformer resonances may be excited, causing high primary ...
Diego Teruo Mendes de Souza   +2 more
doaj   +1 more source

Simulation of dielectric frequency response of transformer insulation system

open access: yes, 2013
Frequency domain spectroscopy has been widely used to monitor the condition of insulation system in power transformers. For a core type of transformer, a simplified XY model of a duct has been developed which allows one to examine the contribution from ...
Yu, Guo, Chen, George
core   +1 more source

Design optimization of high frequency transformer with controlled leakage inductance for current fed dual active bridge converter

open access: yesAIP Advances, 2018
Current fed dual active bridge converters for photovoltaic generation may typically require a given leakage or extra inductance in order to provide proper control of the currents. Therefore, the many researches have been focused on the leakage inductance
Tae-Uk Jung   +2 more
doaj   +1 more source

Transforming characteristics of the Rogowski coil current transformer with a digital integrator for high-frequency signals

open access: yesThe Journal of Engineering, 2019
The Rogowski coil current transformer is widely used in intelligent substations for its rapid response, wide bandwidth measurement, and non-magnetic saturation.
Fubin Pang   +3 more
doaj   +1 more source

On computation of high frequency Hankel transforms

open access: yesAlexandria Engineering Journal, 2019
In this paper, we consider to compute high frequency Hankel transforms numerically. An asymptotic quadrature rule is derived based on the variable upper bound integrals. The scheme is verified to be effective by testing some numerical examples.
Jizhong Gao, Ruyun Chen
openaire   +2 more sources

Integration of Novel High-Frequency Transformer with Silicon-Carbide Schottky Diodes

open access: yes, 2022
This paper presents a novel and compact structure which integrates silicon-carbide (SiC) Schottky diodes within a high-frequency transformer (HFT). The proposed structure would reduce the volume of a power converter and in turn the system to which it is ...
Yao, Weichong   +4 more
core   +1 more source

FREQUENCY DETERMINATION OF HIGH-FREQUENCY LINK FOR PERCPECTIVE ELECTRIC ROLLING STOCK

open access: yesNauka ta progres transportu, 2014
Purpose. Total mileage of Ukrainian electric railways is distributed approximately equally between the areas of direct and alternating current. A double system of electric rolling stock is used to pass jointing places of different current kinds without
D. O. Zabarylo
doaj   +1 more source

HETMCL: High-Frequency Enhancement Transformer and Multi-Layer Context Learning Network for Remote Sensing Scene Classification

open access: yesSensors
Remote Sensing Scene Classification (RSSC) is an important and challenging research topic. Transformer-based methods have shown encouraging performance in capturing global dependencies.
Haiyan Xu   +4 more
doaj   +1 more source

Solid State Transformer for Connecting Consumers to the Medium Voltage Network

open access: yesAdvances in Electrical and Computer Engineering, 2020
In this paper the authors describe and analyze an innovative solution for the development of an electronic transformer (Solid State Transformer - SST) with the voltage 10.0/0.230 kV.
BERZAN, V.   +4 more
doaj   +1 more source

Modeling Simulation of Variable Frequency Transformer and Its Analysis

open access: yesGong-kuang zidonghua, 2012
Connecting two asynchronous power networks by use of high voltage DC method has problems of harmonic interference, commutation failure, difficult implement of smooth power regulation and so on at present.
YANG Wen-gang, HE Cheng, WANG Fu-liang
doaj  

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