Results 1 to 10 of about 28,822 (166)

An Online Monitoring Method for Low-Frequency Dielectric Loss Angle of Mining Cables

Sensors, 2023
The dielectric loss angle can better reflect the overall insulation level of mining cables, so it is necessary to implement reliable and effective online monitoring of the dielectric loss angle of mining cables.
Yanwen Wang, Peng Chen, Chen Feng, Jiyuan Cao   +3 more
doaj   +1 more source

Transition Structure Between Coaxial Cable and Dielectric Rod Waveguide in Microwave Frequency

Frontiers in Physics, 2021
The dielectric waveguide in THz and millimeter circuit is widely researched. However, it is rarely researched in a microwave frequency. In this article, a dielectric rod waveguide (DRW) is proposed with low transmission loss in microwave frequency.
Yin Li, Shi-Yan Zhou, Sai-Wai Wong, Jing-Yu Lin   +3 more
doaj   +1 more source

Research on assessment method for main insulation state of converter transformer based on time‐frequency domain dielectric response

IET Science, Measurement & Technology, 2023
The converter transformer is an essential part of the DC transmission system. Compared with the traditional oil‐impregnated AC transformer, the main insulation of the converter transformer bears more complex electric field aging stress during long‐term ...
Yizhou Zhang, Hao Yun, Mingze Zhang, Shengjie Lei, Yufei Sun   +4 more
doaj   +1 more source

ERROR OF CONTROL OF ELECTRICAL INSULATION STRUCTURES BY DIELECTRIC ABSORPTION PARAMETERS ACCORDING TO THE CONCEPT OF UNCERTAINTY OF MEASUREMENTS

Electrical engineering & Electromechanics, 2020
Introduction. Measurements on alternating current of dielectric absorption parameters – capacitance and dielectric loss tangent tgδ allow us to evaluate the quality of insulation of cables, electrical machines, transformers, etc., both at the ...
G. V. Bezprozvannych, I. A. Kostiukov
doaj   +1 more source

Wideband dielectric properties of silicon and glass substrates for terahertz integrated circuits and microsystems

Materials Research Express, 2021
This paper presents a comprehensive study of the optical and electrical dielectric material properties of six commonly-used silicon and glass substrates at terahertz (THz) frequencies, including refractive index, absorption coefficient, dielectric ...
Nonchanutt Chudpooti, Nattapong Duangrit, Andrew D Burnett, Joshua R Freeman, Thomas B Gill, Chuwong Phongcharoenpanich, Ulrik Imberg, Danai Torrungrueng, Prayoot Akkaraekthalin, Ian D Robertson, Nutapong Somjit   +10 more
doaj   +1 more source

Development of a new prototype system for measuring the permittivity of dielectric materials

The Journal of Engineering, 2014
A simple prototype for measuring the properties of dielectric materials is introduced in this Letter. A homogeneous dielectric sample placed in a field produced by a nearby antenna will affect the input impedance of the antenna.
Jiajia Jiang, Wen Geyi
doaj   +1 more source

Complex dielectric modulus and relaxation response at low microwave frequency region of dielectric ceramic Ba6-3xNd8+2xTi18O54 [PDF]

Journal of Advanced Dielectrics, 2014
The desirable characteristics of Ba6-3xNd8+2xTi18O54 include high dielectric constant, low loss tangent, and high quality factor developed a new field for electronic applications.
Chian Heng Lee, Jumiah Hassan, Mansor Hashim, Raba'ah Syahidah Aziz, Norlaily Mohd Saiden   +4 more
doaj   +1 more source

Measurement Error Estimation for Capacitive Voltage Transformer by Insulation Parameters

Energies, 2017
Measurement errors of a capacitive voltage transformer (CVT) are relevant to its equivalent parameters for which its capacitive divider contributes the most. In daily operation, dielectric aging, moisture, dielectric breakdown, etc., it will exert mixing
Bin Chen, Lin Du, Kun Liu, Xianshun Chen, Fuzhou Zhang, Feng Yang   +5 more
doaj   +1 more source

A Dual-Band Non-destructive Dielectric Measurement Sensor Based on Complementary Split-Ring Resonator

Frontiers in Physics, 2021
A dual-band non-destructive dielectric constant sensor based on the complementary split ring resonators is presented. The resonators for both bands use the complementary split ring structure of different sizes.
Chen Wang, Xiaoming Liu, Xiaoming Liu, Lu Gan, Lu Gan, Qing Cai   +5 more
doaj   +1 more source

Precision Permittivity Measurement for Low-Loss Thin Planar Materials Using Large Coaxial Probe from 1 to 400 MHz

Journal of Manufacturing and Materials Processing, 2018
This paper focuses on the non-destructive dielectric measurement for low-loss planar materials with a thickness of less than 3 mm using a large coaxial probe with an outer diameter of 48 mm.
Kok Yeow You, Man Seng Sim
doaj   +1 more source