Results 11 to 20 of about 16,886,684 (287)

High frequency link Uninterruptible Power Supply (UPS) system [PDF]

open access: yes, 2013
This thesis was submitted for the degree of Master of Philosophy and awarded by Brunel University.The main aim of this thesis is to propose, design, simulate and build a new UPS system which can be used for compact applications.
Rasool, Emad Abdulrazzaq
core   +7 more sources

High frequency inverter-transformer-cycloconverter system for DC to AC (3-phase) power conversion [PDF]

open access: yes, 1991
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.This thesis is concerned with a 3-phase multistage high frequency link DC to AC power conversion with a novel inverter-cycloconverter circuitry.
Karamat, Asghar
core   +7 more sources

Evaluation of Lightning Impulse Test by Frequency Response Analysis [PDF]

open access: yes, 2006
In this work are presented the basis for improving the interpretation of transformer lightning impulse test and the development of a graphical user interface system, which allows comparisons of time domain data and frequency response.
Jorge Ramirez   +3 more
core   +3 more sources

High Frequency (MHz) Resonant Converters using GaN HEMTs and Novel Planar Transformer Technology [Elektronisk resurs]

open access: yes, 2013
The increased power consumption and power density demands of moderntechnologies have increased the technical requirements of DC/DC and AC/DC powersupplies.
Karlsson, Per,   +5 more
core   +8 more sources

Mine inverter based on isolation and transformation of power electronic transformer

open access: yesGong-kuang zidonghua, 2021
At present, the mine inverter and the power frequency transformer are placed separately, which occupies too much underground working space. And the inverter output voltage has high harmonic content and poor waveform quality.
ZHANG Guilin1,2   +4 more
doaj   +1 more source

Power Transformer Condition Monitoring Based on Evaluating Oil Properties

open access: yesMachines, 2022
The authors review the techniques applied to diagnose oil aging. Further, the authors put forward a new diagnostic method. It stipulates for an additional high-frequency measuring loop formed in an operating transformer.
Ivan V. Bryakin   +4 more
doaj   +1 more source

A New 7 kW Air-Core Transformer at 1.5 MHz for Embedded Isolated DC/DC Application

open access: yesEnergies, 2022
This paper presents the study of air-core transformers for electric vehicles, developing them for medium-power (tens of kWs) converter applications specifically used at a high frequency.
Valentin Rigot   +3 more
doaj   +1 more source

A novel energy router based on multi‐winding line frequency transformer

open access: yesIET Generation, Transmission & Distribution, 2023
Energy routers based on the electronic power transformer are suitable for the AC–DC hybrid grid with multiple voltage levels, but their structures are complex.
Zhitao Guan   +4 more
doaj   +1 more source

High frequency model of transformer winding

open access: yesElectrical Engineering in Japan, 2003
AbstractA high frequency model of transformer winding is used to analyze the voltage oscillations due to various excitations such as the very fast transient overvoltage which occurs at the time of disconnecting switch operations. Usually, a circuit of interlinked inductances and capacitances is used for this purpose, in which circuit parameters have to
Shibuya, Yoshikazu, Fujita, Shigeto
openaire   +2 more sources

Exploring the Advantages of Transformers for High-Frequency Trading

open access: yesSSRN Electronic Journal, 2023
This paper explores the novel deep learning Transformers architectures for high-frequency Bitcoin-USDT log-return forecasting and compares them to the traditional Long Short-Term Memory models. A hybrid Transformer model, called \textbf{HFformer}, is then introduced for time series forecasting which incorporates a Transformer encoder, linear decoder ...
Fazl Barez   +3 more
openaire   +3 more sources

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