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 +4 more
doaj +1 more source
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 +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 +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 +4 more
doaj +1 more source
A new behavioural model for performance evaluation of common mode chokes [PDF]
, 2007 A galvanically isolated three-phase AC/AC converter with a high-frequency AC-link has been analyzed from an EMC point of view. This is a special configuration because of a large number of switches, a high frequency transformer, and a fourwire output. The
Bergsma, H. +5 more
core +4 more sources
Design optimization of a high-power transformer for three-phase dual active bridge DC-DC converter for MVDC grids [PDF]
, 2016 High-power DC-DC converter will be one of the essential technologies for the future DC grids. Especially, a three-phase dual-active bridge DC-DC (3DAB) Converter is highly suitable for high-power DC systems.
Feldman, Ralph +4 more
core +1 more source
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 +3 more
doaj +1 more source
IEEE Access, 2021 This paper presents a health analysis technique for transformer winding insulation through thermal monitoring and Fast Fourier Transform (FFT) power spectrum.
Muhammad Aslam +6 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
Yoshikazu Shibuya, Shigeto Fujita
openaire +2 more sources
Geometry optimization and characterization of three-phase medium frequency transformer for 10kVA isolated DC-DC converter [PDF]
, 2017 Three-phase Dual Active Bridge converter is advisable for the High-power DC-DC conversion system. In the ac link, galvanically isolated transformer operated at a medium frequency range provides stepping up or down of the secondary bridge voltage. This
Lee, Youngsil +3 more
core +1 more source