Results 61 to 70 of about 5,815,291 (292)

Neuromorphic Devices for Extreme Environments: State‐Variable Reliability and Stabilization Strategies

Advanced Functional Materials, EarlyView.
Neuromorphic devices for extreme environments are interpreted through the physical states that store and process information. Radiation, temperature extremes, and vacuum can perturb vacancies, filaments, trapped charges, polarization, interfaces, and readout signals.
Taehyun Park, Geon Park, Junhyung Cho, Jaechan Song, Wangmyung Choi, Jaehyun Hur, Nicola Gasparini, Hocheon Yoo   +7 more
wiley   +1 more source

Design of a High‐Voltage High‐Frequency Insulation Test System Using a Ferrite‐Based Oil‐Insulated Resonant Transformer

High Voltage
As power‐electronic (PE)‐based systems become increasingly common in the electric power grid, the insulation systems used in medium‐ and high‐voltage (HV) applications will be exposed to high‐frequency (HF) electric fields.
Weichuan Zhao, Gijs Willem Lagerweij, Mohamad Ghaffarian Niasar   +2 more
doaj   +1 more source

Impact of Accelerated Stresses on Power Transformer Insulation

Energy and Power Engineering, 2017
The paper is based on the experimental investigation of accelerated stresses on insulation of power transformer. The effects of individual thermal and electrical stresses have been graphically presented. The factors accelerated thermal aging factor (ATAF) and accelerated electrical aging factor (AEAF) have been introduced, it helps to understand the ...
Jashandeep Singh, Yog Raj Sood, Piush Verma   +2 more
openaire   +1 more source

Critical Coupling in Semi‐Trasparent Fano Resonators for Photothermal Converters

Advanced Functional Materials, EarlyView.
An ultrathin metal–insulator multilayer architecture is engineered to exploit Fano‐resonant critical coupling, completely suppressing optical reflectance while achieving a balanced 50:50 trade‐off between absorbance and transmittance. Upon laser excitation at resonance, the metamaterial generates intense localized heat (ΔT≈550∘C$\Delta T {\approx }550^\
Giuseppe Emanuele Lio, Giuseppe Nicoletta, Roberto Caputo, Antonio Ferraro   +3 more
wiley   +1 more source

On-Line Detection of Voltage Transformer Insulation Defects Using the Low-Frequency Oscillation Amplitude and Duration of a Zero Sequence Voltage

Energies, 2019
The insulation degradation of a voltage transformer winding is not easy to find, but it may ultimately cause the transformer to explode, leading to accidents such as phase-to-phase short circuits.
Hongwen Liu, Ke Wang, Qing Yang, Lu Yin, Jisheng Huang   +4 more
doaj   +1 more source

Emergence of a Hexagonal Fe2S2 Single Layer Without a Bulk Counterpart via Phase Transformation

Advanced Functional Materials, EarlyView.
Upon annealing, single‐layer Mackinawite iron sulfide transforms into a previously unknown hexagonal Fe2S2${\rm Fe}_2{\rm S}_2$ phase with β$\beta$‐CuI structure. STM, LEED, and first‐principles calculations identify the structure and show that electronic correlations and magnetic order are important for its stability.
Affan Safeer, Wejdan Beida, Felix Oberbauer, Nicolae Atodiresei, Gustav Bihlmayer, Max Wolfertz, Chiara Schlichte, Wouter Jolie, Stefan Blügel, Jeison Fischer, Thomas Michely   +10 more
wiley   +1 more source

Evaluation method for insulation degradation of power transformer windings based on incomplete internet of things sensing data

IET Science, Measurement & Technology
This paper proposes a novel evaluation method to address the challenge of evaluating insulation degradation in power transformer windings based on incomplete online Internet of Things (IoT) sensing data.
Yuehan Qu, Hongshan Zhao, Shice Zhao, Libo Ma, Zengqiang Mi   +4 more
doaj   +1 more source

Electric and Magnetic Field Analysis for a 34.5 kV Transformer Under Composite Voltage Conditions: COMSOL Multiphysics Simulation

Düzce Üniversitesi Bilim ve Teknoloji Dergisi
Transformers are one of the basic components of electrical power systems and play a critical role in energy conversion. However, overvoltages and environmental stresses can cause failures in transformer insulation systems.
Emre Tunç, Murat Fidan
doaj   +1 more source

Analysing the power transformer temperature limitation for avoidance of bubble formation

High Voltage, 2019
Failure of a transformer is a costly incident which can impact power system operation and result in loss of supply to customers. Transformers can fail through a number of mechanisms, one of which is from the formation of bubbles within the insulation ...
James Hill, Zhongdong Wang, Zhongdong Wang, Qiang Liu, Christoph Krause, Christoph Krause, Gordon Wilson   +6 more
doaj   +1 more source

Improvement of Power Transformer Insulation Diagnosis Using Oil Characteristics Data Preprocessed By SMOTEBoost Technique

, 2014
This paper proposes a novel method for power transformer insulation assessment using oil characteristics. A hybrid algorithm, named as SMOTEBoost is implemented in the paper to improve the diagnosis accuracy and consistency.
Ma, Hui, Saha, Tapan, Cui, Yi
core   +1 more source