Results 11 to 20 of about 26,487 (264)

Mine inverter based on isolation and transformation of power electronic transformer

Gong-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, WANG Yiying1,2, LIU Jiangong1,2, CHEN Longfei1,2, LIU Wenzhuang1,2   +4 more
doaj   +1 more source

Power Transformer Condition Monitoring Based on Evaluating Oil Properties

Machines, 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, Igor V. Bochkarev, Vadim R. Khramshin, Vadim R. Gasiyarov, Ivan V. Liubimov   +4 more
doaj   +1 more source

Exploring the Advantages of Transformers for High-Frequency Trading

SSRN 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, Paul Bilokon, Arthur Gervais, Nikita Lisitsyn   +3 more
openaire   +2 more sources

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

Energies, 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, Tanguy Phulpin, Jihen Sakly, Daniel Sadarnac   +3 more
doaj   +1 more source

Partial Discharge Analysis in High-Frequency Transformer Based on High-Frequency Current Transducer

Energies, 2018
High-frequency transformers are the core components of power electronic transformers (PET), whose insulation is deeply threatened by high voltage (HV) and high frequency (HF). The partial discharge (PD) test is an effective method to assess an electrical
Jun Jiang, Mingxin Zhao, Chaohai Zhang, Min Chen, Haojun Liu, Ricardo Albarracín   +5 more
doaj   +1 more source

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

IET 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, Dan Wang, Qing Duan, Chengxiong Mao, Bin Liu   +4 more
doaj   +1 more source

High frequency model of transformer winding

Electrical 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

Proposal of Three-Phase High Frequency Transformer Isolation UPS Topologies

Eletrônica de Potência, 2011
A family of double conversion three-phase uninterruptible power system with power factor correction and high-frequency transformer (HFT) isolation topologies is presented in this work.
Carlos G. C. Branco, René P. Torrico-Bascopé, Cicero M. T. Cruz, Francisco K. A. Lima   +3 more
doaj   +1 more source

Augmented models of High-Frequency Transformers for SMPS [PDF]

2009 20th International Zurich Symposium on Electromagnetic Compatibility, 2009
The modeling of high-frequency transformers via augmented equivalent circuits is addressed. The augmented models are composed of a low-frequency equivalent and a supplemental element modeled via real rational fitting. They offer both high accuracy levels and a physical meaning that helps the interpretation of simulation results.
MAIO, Ivano Adolfo, SAVI, Patrizia, STIEVANO, IGOR SIMONE, CANAVERO, Flavio   +3 more
openaire   +2 more sources

High Frequency Transformer Design and Optimization using Bio-inspired Algorithms

Applied Artificial Intelligence, 2018
High frequency (HF) transformer at the isolation stage of SST plays a vital role in deciding the power conversion efficiency of the SST system. This paper proposes a new design procedure for optimization of HF transformer used in SST applications such ...
Jeyapradha Ravichandran Banumathy, Rajini Veeraraghavalu   +1 more
doaj   +1 more source