Results 281 to 290 of about 2,950,870 (336)
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Modeling and Analysis of Transformer DC Bias Current Caused by Metro Stray Current
IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING, 2020The metro stray current leaked during the subway operation causes the nearby earth surface potential to change, so that the various neutral‐grounded transformers to be at different earth surface potentials, resulting transformer DC bias.
Kun Yu +5 more
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A simple apparatus for DC bias sputtering
Vacuum, 1970This paper describes a system for the deposition by sputtering of thin tantalum films of fairly high purity, which was easily and cheaply constructed. It would be equally suitable for sputtering films of other refractory metals. The films produced have superconducting transition temperatures in the range 3.4°K to 3.8°K, and the ratio of the resistance ...
R.P. Bomer, A.H. Beck
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Excellent Tunable DC Bias Superposition Characteristics for Manganese–Zinc Ferrites
IEEE transactions on power electronics, 2020Manganese–zinc (MnZn) power ferrites own significant applications in inductors and transformers for power conversion. The performance of these components is dependent on permeability, saturation induction, core losses, and dc bias superposition ...
Guohua Wu +7 more
semanticscholar +1 more source
Dielectric susceptibility of PMN under DC bias
Ferroelectrics, 1992Abstract Dielectric susceptibility changes under action of external DC electric fields have been studied for lead magnesium niobate PbMg1/3Nb2/3O3 (PMN) (1,1,1) oriented crystals. At about 210 K, an anomaly appears, which depends on the strength of the field and on the measurement conditions.
R. Sommer +2 more
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Low DC-bias silicon nitride anisotropic etching
Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena, 2015This paper presents an effective approach for silicon nitride plasma dry etching, with low DC-bias (self-bias) and vertical sidewalls. Four factors were studied: capacitively coupled radio frequency power, inductively coupled plasma power, pressure in the etching chamber, and the combination of etching gases.
Yifei Wang, He Liu, Yuanrui Li, Wei Wu
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Experimental Study on Transformer under DC Bias
Applied Mechanics and Materials, 2014As the voltage level to improve, DC bias problem of power transformers increasingly prominent. When the DC current affects the transformer, transformer laminated core magnetization characteristics inside will be affected by magnetic saturation increased.
Yang Hu, Hui Qi Li
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IEEE transactions on magnetics, 2019
The loss prediction of magnetic materials under dc bias is of great significance for the optimization of magnetic components, because the efficiency evaluation of magnetic components involves core loss computation under dc bias.
Ren Liu, Lin Li
semanticscholar +1 more source
The loss prediction of magnetic materials under dc bias is of great significance for the optimization of magnetic components, because the efficiency evaluation of magnetic components involves core loss computation under dc bias.
Ren Liu, Lin Li
semanticscholar +1 more source
Transformer Excitation Characteristics Research under DC Bias
Applied Mechanics and Materials, 2014Solar storms and power engineering HVDC, make the earth there geomagnetic induced current and direct current. If the DC current into the neutral grounding transformer, the transformer will be caused bias magnetic phenomena, changing its excitation characteristics, interfere with the normal operation of power systems and equipment.
Yang Hu, Hui Qi Li
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Matrix Inductor With DC-Bias Effect Reduction Capability for GaN-Based DC-DC Boost Converter
IEEE Transactions on Circuits and Systems II: Express Briefs, 2020In this brief, a 400-W Gallium Nitride device based DC-DC boost converter with a four phase matrix inductor is proposed. It is well-known that there is a significant influence of the DC bias on inductor core losses and the simplest solution is to employ multiphase structures. However, the size of the converter will also increase as the number of phases
Anh Dung Nguyen +3 more
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Effect of Voltage Bias on the dc SQUID Characteristics
Journal of Low Temperature Physics, 2001The dynamics of the dc SQUID, when voltage biased through an inductor, is computed by numerical simulation and by perturbative analytical calculation. We find that the dynamic resistance decreases from its current-biased value at low bias voltages, where the inductive series reactance no longer separates the Josephson voltage oscillation from the bias ...
Seppä, Heikki, Kiviranta, Mikko
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