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Pommerenke, David
Graz University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2023On the Difficulties to Determine the Intrinsic Material Parameters for MnZn Ferritescitations
- 2023The distribution of discharge amplitudes of randomly colliding charged spherescitations
- 2023A Method to Determine the Permittivity of Anisotropic Thin Sheet Absorber Materials
- 2018Characterization of relative complex permittivity and permeability for magneto-dielectric sheetscitations
- 2018Measurement of Dielectric Constant and Cross-Sectional Variations of a Wirecitations
- 2018Common-mode impedance of a ferrite toroid on a cable harness
- 2012Nonlinear capacitors for ESD protectioncitations
- 2011Rapid rotary scanner and portable coherent wideband Q-band transceiver for high-resolution millimeter-wave imaging applicationscitations
- 2002Efficient FDTD simulation of fields in coaxial cables with multi-layered insulation partially formed by dispersive layers of extremely high permittivitycitations
- 2000Broadband measurement of the conductivity and the permittivity of semiconducting materials in high voltage XLPE cables
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document
The distribution of discharge amplitudes of randomly colliding charged spheres
Abstract
If portable devices such as smartphones or tablets are carried e.g. in a backpack, tribo-electric charging due to metallic objects can lead to impulsive discharges and damage of the device. The discharge voltages are random because of the random movement of the objects. In previous experiments, spherical metallic objects and various non-conducting materials such as rubber, nylon, and plastic were assembled in a shaker to emulate the backpack and its movements. Discharge events were recorded using a linearly polarized Vivaldi antenna and, performing some 1000 experiments, histograms of the maximum detected field strengths were assembled. In our present paper, we refine the previously proposed procedure by explicitly deconvolving the impact of the linear polarization on the measured field strength. We compute the histogram of the discharge voltage between the spherical objects, propose a Gamma probability density to characterize its statistics and compute its parameters b and p for various assemblies of the non-conducting materials. The proposed procedure can be used to estimate the probability of failure of tribo-electrically charged devices.