1,721,130 research outputs found
EMI Measurements in Line-Pantograph Contact Discontinuity in Railway Transportation Systems
No full textBasic Experimental Set-Ups for the Characterization of Emission from Electrical Discharge Events
No full textWe address the phenomenon of the electrostatic discharge from the point of view of its implications in the field of electromagnetic compatibility. Conducted and radiated emissions from electrical discharges are considered. We investigate how the main parameters of an electrical or electronic system participating in a discharge process contribute to the production of electromagnetic interferences. Here we report a summary of the results that we have previously obtained, as well as some new data on the specific topic of discharges between two isolated spheres. We have been involved in an extensive experimental study of the emission from discharge events, and several specific experimental set-ups have been implemented for their phenomenological characterization. We discuss also the application of simplified numerical models, based on parameters extracted from the experiments. Particular attention is given to the role of the arc in the electromagnetic radiation associated with electrostatic discharges. We discuss the contribution of the arc channel to the total radiated emission from the circuit, and present experimental evidence that this contribution is negligible compared to that of the rest of the circuit. Finally, we present some remarks on the modelling of the discharge formation
VI-Characterization of Soft Magnetic Materials by Driving Current or Voltage
No full textWe analyse the volt-amperometric (VI-) method for the characterization of minor loops of soft magnetic materials. By adopting several input signals and by operating at various frequencies in the 10 Hz – 10 kHz frequency range, we perform the measurement on a soft ferrite core. Through the use of two different measurement schemes, we control in the first case the voltage across– and in the second case the current through– the primary coil. Measurement results are reported and a comparison among the various techniques is provided throughout the paper
A versatile cryogenic temperature controller
No full textwe present the design and implementation of a versatile cryogenic temperature controller based on a microcontroller, characterized by high-accuracy and stability. It has been used to perform automated measurements on electron devices operating at very low temperatures. Noise measurements oil such devices are particularly sensitive, because random fluctuations of temperature call result in electrical noise superimposed to the quantity being measured. The system described ill this contribution can operate as a stand-alone unit or call be remotely controlled via all RS232 interface. High accuracy a!ld stability (+/-50 mK in the 10-300 K range), low noise, and on overall low cost are the main results that have been achieved
Circuitos Microelectrónicos II
No full textGrado en Ingeniería de Tecnologías Industriales, Instituto de Idiomas Moderno
Circuitos Microelectrónicos I
Full text linkGrado en Ingeniería de Tecnologías Industriales, Instituto de Idiomas Moderno
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