Results 251 to 260 of about 885,382 (297)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +1 more source
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
openaire +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
openaire +1 more source
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
openaire +1 more source
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
openaire +2 more sources
A Novel Control Method for Eliminating DC Bias in Dual-Active-Bridge DC-DC Converters
2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC), 2018This paper proposes a novel transient current control method for dual-active-bridge (DAB) dc-dc converters. When sudden load transients or reference change, the dc bias of inductor current will occur under the traditional control method, which may cause induce magnetic-flux saturation and excessive current spike in the loop.
Kai Li +5 more
openaire +1 more source
A Prediction Method of DC Bias for DC-DC Dual-active-bridge Converter with MOSFETs
2019 14th IEEE Conference on Industrial Electronics and Applications (ICIEA), 2019The dual-active-bridge (DAB) converter attracts more and more attentions due to its ability of bidirectional power transmission and high conversion efficiency. The adoption of high-frequency transformer provides galvanic isolation, but also brings the possibility of de bias.
Dong Yuan +5 more
openaire +1 more source
Dual loop control for eliminating DC-bias in a DC-DC dual active bridge converter
2014 International Conference on Renewable Energy Research and Application (ICRERA), 2014In bi-directional dual active bridge (DAB) converters, non-ideal behavior of the system components can lead to dc bias in the converter which results in magnetic saturation of the high frequency transformer. This paper proposes adding an extra control loop to overcome this problem.
Bhanu Prashant Baddipadiga +1 more
openaire +1 more source