Results 11 to 20 of about 1,608,983 (244)
Conductivity and the current–current correlation measure [PDF]
Journal of Physics A: Mathematical and Theoretical, 2010 We review various formulations of conductivity for one-particle Hamiltonians and relate them to the current-current correlation measure. We prove that the current-current correlation measure for random Schr dinger operators has a density at coincident energies provided the energy lies in a localization regime. The density vanishes at such energies and
Combes, J. M. +2 more
openaire +2 more sources
Improved 3-Phase Current Transducer
Proceedings, 2018 We propose improved contactless DC/AC current transducer for 3-phase current lines based on 8 integrated fluxgate sensors. Using proper processing we ideally achieve a complete suppression of external homogeneous fields, and field gradients up to the 4th
Pavel Ripka +2 more
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Three-Phase Motor Inverter and Current Sensing GaN Power IC
Sensors, 2023 A three-phase GaN-based motor inverter IC with three integrated phase current mirror sensors (sense-FETs or sense-HEMTs, 1200:1 ratio), a temperature sensor, and an amplifier is presented and experimentally operated.
Stefan Mönch +6 more
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A Detailed Testing Procedure of Numerical Differential Protection Relay for EHV Auto Transformer
Energies, 2021 In power systems, the programmable numerical differential relays are widely used for the protection of generators, bus bars, transformers, shunt reactors, and transmission lines.
Umer Ehsan +8 more
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Modeling and Analyzing the Mutual Inductance of Rogowski Coils of Arbitrary Skeleton
Sensors, 2019 There are Rogowski coils of various shapes in the on-site measurement, and it is difficult to calculate the electrical quantities of Rogowski coils of curved skeleton and circular cross-section by simulation software.
Xiaoyu Liu, Hui Huang, Chaoqun Jiao
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FEM Analysis and Sensor-Based Measurement Scheme of Current Distribution for Grounding Electrode
Applied Sciences, 2020 The current distribution of the grounding electrode in a high-voltage direct current (HVDC) transmission system affects the state of power equipment in its vicinity, which depends on the soil resistivity and shape of the grounding electrode.
Li Zhu +5 more
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Low-Impact Current-Based Distributed Monitoring System for Medium Voltage Networks
Energies, 2021 Distribution networks are currently subject to a huge revolution in terms of assets being installed. In particular, the massive spread of renewable energy sources has drastically changed the way of approaching the grid.
Alessandro Mingotti +2 more
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Journal of Thermal Science and Technology, 2009 In a polymer electrolyte fuel cell (PEFC), the current density through the polymer electrolyte membrane (PEM) is distributed along the electrode on the membrane electrode assembly (MEA).
Yasuo YOKOUCHI +3 more
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Bimetallic ammeter: a novel method of current measurement
Emergent Scientist, 2020 An electric current flowing through a bimetallic coil heats it up, and due to thermal expansion, the coil either unwinds or winds depending on the direction of net heat transfer and the specific heat capacities of the metals used.
Uy Robert Frederik +2 more
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Sensors, 2021 Conventional current transformers (CTs) suffer from nonlinearities due to their ferromagnetic cores. On one hand, it is well-known that severe core saturation may occur because of large overcurrents or unidirectional transient components: this may ...
Christian Laurano +2 more
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