Results 11 to 20 of about 16,886,585 (187)

Analytical Model of a High-Frequency Rotary Transformer

open access: yesIEEE Access
The permanent magnet synchronous motors are widely used for the propulsion of electric vehicles. These motors have good performance, but result expensive because the permanent magnets installed on their rotor contain rare earths.
Manuele Bertoluzzo   +2 more
doaj   +4 more sources

High-frequency oscillations in a power transformer

open access: yes2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230), 2002
Power transformers are widely used as step-up or step-down devices and they can offer galvanic isolation between the input of the power supply and the output. When the operating frequency is considerably high, transformer parasitics are of importance. Interleaving of the transformer windings causes a reduction of the leakage inductance.
G.D. Dernetriades   +2 more
openaire   +2 more sources

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

The simulation of a new high frequency transformer

open access: yesJournal of Energy Systems, 2022
Core losses of transformers motivate many engineers and scientists to design and implement different transformers for their specific aims. Since there exists a growing interest on high frequency applications in today’s world, design and optimization studies of a magnetic fluid core transformer (MFCT), having an easy and cheap production approach in ...
Sude HATEM, Erol KURT
openaire   +4 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 transformation of Rhizobium meliloti [PDF]

open access: yesJournal of Bacteriology, 1988
Transformation of R factor RP4 and its derivative pRK290 from Escherichia coli to Rhizobium meliloti is reported. The efficiency of transformation was in the range of 10(-5) per viable cell. In addition, chromosomal DNA prepared from one R. meliloti strain resistant to streptomycin was transferred to the isoleucine-valine-requiring mutant susceptible ...
J, Courtois, B, Courtois, J, Guillaume
openaire   +2 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

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

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

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