Results 41 to 50 of about 350,104 (214)

Crackling Noise, Power Spectra and Disorder Induced Critical Scaling

, 2001
Crackling noise is observed in many disordered non-equilibrium systems in response to slowly changing external conditions. Examples range from Barkhausen noise in magnets to acoustic emission in martensites to earthquakes.
A. Berger, A. Travesset, B. Alessandro, B. Alessandro, E. Vives, E. Vives, G. Korniss, H. Ji, I. Rafols, J.P. Sethna, J.R. Petta, K. A. Dahmen, K. Dahmen, Ll. Carrillo, M. Kuntz, M.B. Weissman, M.C. Kuntz, O. Perkovic, O. Perkovic, P. Mazzetti, R. A. White, R. Blossey, S. Field, S. Zapperi, S.L. Queiroz   +24 more
core   +3 more sources

A New Method for Offline Compensation of Phase Discrepancy in Measuring the Core Loss With Rectangular Voltage

IEEE Open Journal of the Industrial Electronics Society, 2021
Nowadays accurate characterization of the magnetic component losses becomes increasingly important in the design stage of power converters. As the main challenge in characterizing a magnetic component, the core loss is commonly measured through the two ...
Navid Rasekh, Jun Wang, Xibo Yuan
doaj   +1 more source

Field Experience With Sweep Frequency Response Analysis For Power Transformer Diagnosis

, 2015
Sweep frequency response analysis has been turning out a powerful tool for investigation of mechanical as well as electrical integration of transformers. In this paper various aspect of practical application of SFRA has been studied. Open circuit and short circuit measurement were done on different phases of high voltage and low voltage winding. A case
Ambuj Kumar, Singh, Sunil Kumar, Shrikant Singh   +2 more
openaire   +1 more source

Machine learning for power transformer SFRA based fault detection

International Journal of Electrical Power & Energy Systems
This paper presents machine learning methods for health assessment of power transformer based on sweep frequency response analysis. The paper presents an overview of monitoring and diagnostics based on statistical Sweep Frequency Response Analysis (SFRA)
Miloš Bjelić, Bogdan Brković, Mileta Žarković, Tatjana Miljković   +3 more
doaj   +1 more source

DC-DC 3SSC-A-Based Boost Converter: Analysis, Design, and Experimental Validation

Energies, 2021
A detailed analysis and validation of the DC-DC boost converter based on the three-state switching cell (3SSC) type-A are presented in this paper.
Lucas Carvalho Souza, Douglas Carvalho Morais, Luciano de Souza da Costa e Silva, Falcondes José Mendes de Seixas, Luis De Oro Arenas   +4 more
doaj   +1 more source

Nonlinear characterization of half and full wavelength power ultrasonic devices [PDF]

, 2016
It is well known that power ultrasonic devices whilst driven under elevated excitation levels exhibit nonlinear behaviors. If no attempt is made to understand and subsequently control these behaviors, these devices can exhibit poor performance or even ...
Cardoni, Andrea, Cerisola, Niccolò, Mathieson, Andrew   +2 more
core   +1 more source

Testing and diagnostic out of the service power transformer using a sweep frequency response analysis (SFRA) comparing with China standard

Diagnostyka
A several diagnostic methods used to evaluate and detect any potential issues or faults in the transformer before they cause significant problems. The research proposal focuses on employing the SFRA (Sweep Frequency Response Analysis) technique, renowned
Djeriou Salim, R. Rouabhi, Ilies Ayad, Mohamed Bouchahdane, Mounir Dif   +4 more
semanticscholar   +1 more source

Modeling and Analysis of Amplitude-Frequency Characteristics of Torsional Vibration for Automotive Powertrain

Shock and Vibration, 2020
In the present paper, the amplitude-frequency characteristics of torsional vibration are discussed theoretically and experimentally for automotive powertrain.
Jinli Xu, Jiwei Zhu, Feifan Xia
doaj   +1 more source

Pruebas de transformadores, espectroscopía en el dominio de la frecuencia y método de análisis de respuesta por barrido de frecuencia [PDF]

, 2011
La espectroscopía es una técnica mediante la cual podemos observar gráficamente la interacción entre materia y energía radiada, ya sea en función de la longitud de onda o la frecuencia, lo que nos permite aislar e identificar la estructura ...
Maya Izurieta, Néstor Xavier, Vásquez Restrepo, Luis Alberto   +1 more
core  

Finite Element Model Updating of Satellite Sailboard Based on Sensitivity Analysis

Shock and Vibration, 2019
The modal analysis of a satellite sailboard finite element model is carried out to accurately investigate the response of a satellite sailboard in a complex loaded space environment through simulation. The basic excitation vibration test of the satellite
Haitao Luo, Wei Wang, Jia Fu, Lichuang Jiao   +3 more
doaj   +1 more source