Now showing items 1-20 of 25

    • A resonant measurement system for characterization of hysteresis cycle in soft ferrites 

      Giannetti, Romano; Lizón Martínez, Santiago; Robles Muñoz, Guillermo; Tellini, Bernardo (Sin editorial (Sorrento, Italia), 24/04/2006)
      Characterization of magnetic cores is an indispensable task in order to securely accomplish the requirements of a power electronic design and prevent failures. Obtaining the hysteresis cycle is a crucial step to achieve a ...
    • Accommodation study via a sensorless measurement technique 

      Tellini, Bernardo; Giannetti, Romano; Lizón Martínez, Santiago; Marracci, Mirko (01/02/2008)
      We present the results of an experimental analysis aimed at further characterizing the accommodation phenomenon. The measurements are done on commercial ferrite cores by the use of a volt-amperometric measurement technique. ...
    • An improved DAQ-based method for ferrite characterization 

      Guarnieri Calo Carducci, Carlo; Marracci, Mirko; Attivissimo, Filippo; Giannetti, Romano; Tellini, Bernardo (01/09/2017)
      In this paper, we propose an improved version of the classical volt-amperometric measurement method for the characterization of magnetic hysteresis and losses in soft magnetic cores. Using an appropriate circuital solution ...
    • Basic experimental set-ups for the characterization of emission from electrical discharge events 

      Giannetti, Romano; Macucci, Massimo; Tellini, Bernardo (WIT Press (Southampton, Reino Unido), 01/09/2003)
    • Characterization of the accommodation effect in soft hysteretic materials via sensorless measurement technique 

      Tellini, Bernardo; Giannetti, Romano; Lizón Martínez, Santiago; Marracci, Mirko (01/08/2009)
      The well-known voltamperometric method has only been used so far in the identification of symmetric hysteresis cycles for reasons that are explained in the main text. This paper extends the sensorless measurement method ...
    • Conducted and radiated interference measurements in the line-pantograph system 

      Tellini, Bernardo; Macucci, Massimo; Giannetti, Romano; Antonacci, G. (01/12/2001)
      We present the results of a measurement campaign aimed at investigating electromagnetic interference (EMI) phenomena in the interaction between overhead railway power supply lines and pantograph. In order to obtain such ...
    • Conducted and radiated interference measurements in the line-pantograph system 

      Tellini, Bernardo; Macucci, Massimo; Giannetti, Romano; Antonacci, G. (Sin editorial (Baltimore, Estados Unidos de América), 01/02/2000)
      We present the results of a measurement campaign aimed at investigating electromagnetic interference phenomena in the interaction between overhead railway power supply lines and pantograph. In order to obtain such data, ...
    • Current measurement in electrical discharges in air gaps for conducted noise estimation 

      Tellini, Bernardo; Giannetti, Romano (Sin editorial (Saint Paul, Estados Unidos de América), 01/06/1998)
      In this paper current rising time and power spectral density in electrical discharges in overvoltaged air gaps with different electrode geometries are investigated in order to perform a preliminary study on the characteristics ...
    • Design of a system for continuos intraocular pressure monitoring 

      Giannetti, Romano; Lizón Martínez, Santiago; Rodríguez Marrero, José Luis; Tellini, Bernardo (01/08/2005)
      Measuring intraocular pressure (IOP) has proved to be an important diagnosis tool for detecting and preventing glaucoma, a disease that could lead to blindness or even eye loss. Continuous time monitoring of IOP is important ...
    • Equivalent network modeling to simulate electrical discharges 

      Giannetti, Romano; Tellini, Bernardo (01/07/2000)
      This paper presents an integral method developed to simulate the current waveform generated by electrical discharges in overvoltaged air gaps. The electrodes/dielectric physical configuration is modeled with a schematic ...
    • Experimental analysis of magnetic accommodation properties via the use of complex trajectories 

      Marracci, Mirko; Tellini, Bernardo; Giannetti, Romano; Lizón Martínez, Santiago (IEEE (Austin, Estados Unidos de América), 03/05/2010)
      We present the results of an experimental analysis aimed at characterizing possible accommodation phenomena in soft magnetic materials. The amount of magnetization change and the magnetization stabilization process appear ...
    • Identification of parameters in a rogowski coil used for the measurement of partial discharges 

      Robles Muñoz, Guillermo; Argueso, Marta; Sanz, Javier; Giannetti, Romano; Tellini, Bernardo (Sin editorial (Varsovia, Polonia), 01/05/2007)
      The Rogowski coil is a simple and inexpensive device that can be adapted to measure high frequency currents such as those created by partial discharges in dielectrics. It has been demonstrated in previous works that the ...
    • Improvements in a method to characterize soft ferrite up to high frequencies 

      Tellini, Bernardo; Giannetti, Romano; Lizón Martínez, Santiago (01/05/2006)
      This paper aims to show a low-cost and easy to use measurement method for characterizing magnetic material B(H) relation up to medium frequencies providing an acceptable overall accuracy of the acquired data.
    • Line-pantograph EMI in railway systems 

      Tellini, Bernardo; Macucci, M.; Giannetti, Romano; Antonacci, G. (01/12/2001)
      At present, the EN50121 standards are the main reference for electromagnetic compatibility in European railway systems. These standards should improve as technology and testing develops. Therefore, major sources of EMI in ...
    • Measurement of Asymmetric Minor Loops in Soft Ferrites Up to Medium Frequencies 

      Lizón Martínez, Santiago; Tellini, Bernardo; Giannetti, Romano; Robles Muñoz, Guillermo (Sin editorial (Varsovia, Polonia), 01/05/2007)
      An accurate measurement of the hysteresis cycle of magnetic cores is a crucial step in its characterization, due to its nonlinear and past-dependent effects over a design. These effects must be taken into account in order ...
    • Measurement of asymmetric minor loops in soft ferrites up to medium frequencies 

      Lizón Martínez, Santiago; Tellini, Bernardo; Giannetti, Romano; Robles Muñoz, Guillermo (01/02/2009)
      An accurate measurement of the hysteresis cycle of magnetic cores is a crucial step in its characterization due to the importance that its nonlinear and past-dependent effects can have on the correct operation in most ...
    • Measurement of magnetic accomodation through a sensorless technique 

      Tellini, Bernardo; Giannetti, Romano; Lizón Martínez, Santiago (Sin editorial (Victoria, Canadá), 12/05/2008)
      An extended analysis of the sensorless measurement methods adopted for the characterization of soft magnetic materials is here reported. The capability of measuring non symmetric cycles and their accommodation is reported ...
    • Measuring the magnetic field attenuation of nonlinear shields 

      Bologna, M.; Giannetti, Romano; Marracci, Mirko; Tellini, Bernardo (Sin editorial (Sorrento, Italia), 24/04/2006)
      The problem of a low-frequency shielding of a loop placed inside a coaxial torus shield is analyzed by the application of the Schelkunoff transmission theory of shielding. Copper and iron torus shields are considered. In ...
    • New method to characterize magnetic hysteresis in soft ferrites up to high frequencies 

      Tellini, Bernardo; Giannetti, Romano; Robles Muñoz, Guillermo; Lizón Martínez, Santiago (01/02/2006)
      Characterization of magnetic cores is an indispensable task in order to securely accomplish the requirements of a power electronic design and prevent failures. The hysteresis cycle of the material is one of the more complex ...
    • Numerical characterization of dynamic hysteresis loops and losses in soft magnetic materials 

      Cardelli, E.; Giannetti, Romano; Tellini, Bernardo (01/05/2005)
      This paper deals with the characterization of dynamic loops shapes and losses in soft magnetic materials. An experimental and theoretical analysis has been done in order to describe static and dynamic hysteresis on soft ...