Results 241 to 250 of about 28,176 (317)
Allan Variances for DC Voltage Measurements with Polarity Reversals
2004 Conference on Precision Electromagnetic Measurements, 2004 Precise measurements of dc voltage were made using a polarity reversal technique and the results were analyzed using the Allan variance. These were then compared with the Allan variances for unreversed or unipolar measurements of the same processes. The Allan variances were found to agree quite well, particularly for sampling times corresponding to the
Thomas J. Witt
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Breakdown characteristics of oil-paper insulation under ac and polarity reversal voltage
2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM), 2015 In HVDC transmission systems, the main insulation of the converter transformer on valve side is subjected to an AC+Pr (AC and polarity reversal) voltage. In order to ensure the safety operation of the converter transformer, it is necessary to research breakdown characteristics of the oil-paper insulation under this voltage waveform. A set of AC+Pr high
Yonghong Wang, Tianye Wang, Jiuchang Xue
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Spontaneous reversal of polarity of the voltage across LLC‐PK1 renal epithelial cell sheets
Journal of Cellular Physiology, 1987 AbstractWhile sterilely monitoring transepithelial voltage (potential difference) across LLC‐PK cell sheets over a 24‐hr period, we noted that the apical‐negative, transepithelial voltage, a key property of the LLC‐PK1 renal epithelial cell line, reverses polarity to become apical‐positive.
James M. Mullin, Thomas G. O’Brien
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IEEE Transactions on Dielectrics and Electrical Insulation, 2019 In this paper, the temporal space charge dynamics under both temperature and voltage polarity reversal of an epoxy resin impregnated crepe paper are characterized by pulsed electroacoustic method. It is found that the space charge injection and the interfacial traps located between the epoxy and paper plays an important role in determining the space ...
Hongliang Zhang +5 more
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2018 12th International Conference on the Properties and Applications of Dielectric Materials (ICPADM), 2018 Isotactic Polypropylene (iPP) is a kind of potential HVDC power cable insulation material for its green property and excellent electrical performance. Dynamic evolution of space charge under polarity reversal voltage is harmful to long term operation of HVDC power cables.
Chenyuan Teng +4 more
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Exciter Polarity Reversals in Voltage-Regulated Aircraft Alternators [includes discussion]
Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems, 1952 R. P. Judkins, Harden M. McConnell
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Influence Of Polarity Reversal Of Dc Voltages On The Spatial Charge Distribution
1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena,, 2005 Ying Li, Tatsuo Takada
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Polarity Reversal and Over Voltage Affecting Discharge Inception of Tri-Post Insulator in DC-GIL
, 2022 Boxue Du, Hucheng Liang
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The Effect of Voltage Polarity Reversal on Space Charge Behavior of Epoxy MgO Nanocomposites
2021 IEEE Electrical Insulation Conference (EIC), 2021 Nagaraju Guvvala, R. Sarathi
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Space charge dynamics in double-layered insulation cable under polarity reversal voltage
IEEE Transactions on Dielectrics and Electrical Insulation, 2020To investigate space charge behavior in double-layered cable insulation, a one-dimensional axisymmetric model for bipolar charge transport is built in this work. Effects of temperature gradient and electric field gradient in the radial direction are considered.
Jiming Chen +4 more
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