A Knowledge-Based Analysis of Interlaminar Faults for Condition Monitoring of Magnetic Cores With Predominant Focus on Axial Offset Between the Fault Points

Condition monitoring and fault diagnosis of electromagnetic devices is a normal practice to prevent unpredicted downtime and catastrophic failure. In this sense, interlaminar faults (ILFs) detection or fault diagnosis in the magnetic cores is a key objective. This article aims to present advanced experimental measurements and numerical analysis to study the influence of ILFs on soft magnetic properties of magnetic cores with grain-oriented electrical steels (GOES). The predominant focus of these studies and associated analysis is ILFs with axial offset between the short-circuit points. To carry out the experimental measurements, the stacks of four standard Epstein size strips of GOES were assembled. Each stack was subjected to minor ILF with axial offset from 0 to 200 mm. The test samples were magnetized under controlled sinusoidal induction at a frequency of 50 Hz and peak inductions of 1.1–1.7 T. The impacts of each fault scenario on soft magnetic properties of the test samples were investigated by monitoring and interpreting the dynamic hysteresis loops (DHLs). In favor of supporting the practical measurements, accurate time-domain finite element (FE) models were also undertaken to reproduce the DHLs and to visualize distribution of interlaminar eddy currents and power loss caused by ILFs

Magnetic non-destructive materials characterization of non-ferromagnetic materials using magnetic susceptibility

International audienceAll materials interact with an external magnetic field to some extent quantified by the magnetic susceptibility χ . There is a correlation between local χ value and local anomalies of material composition, deformation and stress, which makes it interesting to explore related sensor principles with a potential for NDT application. This contribution however concerns a modification over the magnetic force based sensor for laterally resolved susceptibility measurement and demonstrates the possible range of NDT applications on different non-ferromagnetic material samples. This sensor however eliminates the use of cantilever to avoid possible vibrations in the industrial environment

Regulación emocional en adoptados: el papel de las actitudes parentales y la comunicación sobre adopción

Antecedentes: la aceptación/rechazo de las características específicas de la adopción y la comunicación en torno a la adopción son dos de los rasgos más relevantes de la dinámica familiar adoptiva. En este estudio se analiza la relación entre el ambiente familiar adoptivo (definido en términos de esas dos variables) y la regulación emocional de niñas y niños adoptados. Método: se estudió a 70 madres o padres de niños adoptados, actualmente en edad escolar. Resultados: los datos indican que los adoptados de esta investigación, según la percepción de sus padres, presentan adecuadas puntuaciones en regulación emocional. Respecto a la dinámica familiar, el reconocimiento de diferencias predice de forma significativa la labilidad/negatividad emocional infantil a través de la mediación simultánea de la calidad emocional de y la satisfacción parental con la comunicación sobre la adopción. Además, se observó un efecto indirecto de la adversidad temprana sobre la labilidad emocional de los adoptados. Conclusiones: los resultados aportan nueva información sobre el desarrollo emocional de los adoptados, destacando la importancia del entorno familiar y de las experiencias pre-adoptivas.Background: Acknowledgement/rejection of adoption related differences and communication about adoption are two of the most important features of adoptive family dynamics. The present study focuses on the role played by these two variables on the adoptees’ emotion regulation. Method: The adoptive parents of 70 school-aged children participated in the study. Results: Data showed that participant parents perceived their adopted children’s emotion regulation as adequate. In relation to family dynamics, acknowledgment of the adoption specificities significantly predicted the emotional lability/negativity of the adoptees, simultaneously mediated by the emotional quality of and the parental satisfaction with the communication about adoption. Furthermore, there was an indirect effect of early adversity on the adopted child’s emotional lability. Conclusions: These findings provide new insight into adopted children’s emotional development, highlighting the importance of the family environment and pre-adoption experiences