Results 1 to 10 of about 3,914,143 (293)

Review of surface transient charge measurement on solid insulating materials via the Pockels technique

open access: yesHigh Voltage, 2021
Surface charges accumulated on solid insulating materials in electrical apparatuses and electronic devices could distort the initial electric field and severely damage the insulation performance.
Bo Zhang   +6 more
doaj   +1 more source

Multi‐modified epoxy insulation with improved flashover threshold for HVDC applications

open access: yesIET Nanodielectrics, 2023
The flashover threshold (Vflsh) of polymer insulations such as epoxy (EP) in HVDC systems can be augmented by modifying their surface with an appropriate treatment technology.
Inzamam Ul Haq, Feipeng Wang
doaj   +1 more source

Voltage relaxation curve‐based state of charge estimation method with reduced measurement time

open access: yesElectronics Letters, 2023
This paper proposes a method for estimating a battery's State of Charge using voltage relaxation curves. This method offers advantages over the conventional State of Charge estimation methods by reducing the measurement time of the Open Circuit Voltage ...
Suhyeon Lee, Dongho Lee
doaj   +1 more source

Gas–solid interface charge characterisation techniques for HVDC GIS/GIL insulators

open access: yesHigh Voltage, 2020
Surface charge accumulation on the spacers is one of the key issues restraining the development of HVDC GIS/GIL. The precise measurement of surface charge properties provides the basis for further study of the surface charge transport mechanism as well ...
Lei Zhang   +13 more
doaj   +1 more source

WSN-Based Space Charge Density Measurement System. [PDF]

open access: yesPLoS ONE, 2017
It is generally acknowledged that high voltage direct current (HVDC) transmission line endures the drawback of large area, because of which the utilization of cable for space charge density monitoring system is of inconvenience.
Dawei Deng   +3 more
doaj   +1 more source

Estimation of de-trapped charge for diagnosis of transformer insulation using short-duration polarisation current employing detrended fluctuation analysis

open access: yesHigh Voltage, 2020
Researchers have shown that the value of charge carriers, de-trapped from the oil–paper interface of power transformer insulation, is useful in carrying out the diagnosis.
Saurabh Dutta   +4 more
doaj   +1 more source

Research progress on space charge measurement and space charge characteristics of nanodielectrics

open access: yesIET Nanodielectrics, 2018
Since the proposal of the notion of nanodielectric, the space charge characteristics of nanodielectrics have been widely investigated. With the addition of nanoparticles, some nanodielectrics exhibit smaller space charge accumulation amount during the ...
Ya-Ni Wang   +3 more
doaj   +1 more source

Methods study on high-resolution bunch charge measurement based on cavity monitor

open access: yesHe jishu, 2021
BackgroundBunch charge is the most fundamental characteristic parameter of the particle beam. The Shanghai Soft X-ray Free Electron Laser Device Facility (SXFEL) needs to add a charge feedback loop to accurately control the bunch charge and the ...
CAO Shanshan   +4 more
doaj   +1 more source

The DEPFET Sensor-Amplifier Structure: A Method to Beat 1/f Noise and Reach Sub-Electron Noise in Pixel Detectors

open access: yesSensors, 2016
Depleted field effect transistors (DEPFET) are used to achieve very low noise signal charge readout with sub-electron measurement precision. This is accomplished by repeatedly reading an identical charge, thereby suppressing not only the white serial ...
Gerhard Lutz   +4 more
doaj   +1 more source

A Velocity Measurement Method Based on Charge Induction

open access: yesSensors, 2023
In this paper, based on the principle of charge induction, a new velocity measurement method is proposed. A moving target generates a low-frequency electric field, which can be induced with an electrode and detection frontend.
Yangbin Chi   +3 more
doaj   +1 more source

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