Results 241 to 250 of about 1,675,720 (296)

Effect of Voltage Bias on the dc SQUID Characteristics

Journal of Low Temperature Physics, 2001
The 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

Impedance of DC-bias-controlled composite FBARs

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2013
A closed-form analytic formula is derived for composite resonators consisting of two layers of paraelectricphase ferroelectrics. It is used to analyze the properties of these resonators. Under an applied dc electric field, the layers exhibit an induced piezoelectric effect.
Spartak, Gevorgian, Andrei, Vorobiev
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Research on DC Bias Due to Magnetic Storm and DC Transmission

2005 IEEE/PES Transmission & Distribution Conference & Exposition: Asia and Pacific, 2005
This paper focuses on the research on the DC bias due to magnetic storm and HVDC. In the paper, we introduce the DC bias problem of Jiangsu Yang-Huai transmit electric system and Southern Power Grids, discuss the harmful effect of the transformer DC bias and the significance of research, and analyze the compensation, weakening and elimination of ...
null Weiping Shi, null Lianguang Liu, null Qian Wang, null Zongqi Liu   +3 more
openaire   +1 more source

Detection Method of the DC Bias in Distribution Power Transformers

IEEE Transactions on Industrial Electronics, 2013
Nonlinear loads such as ac drives, switch-mode power supplies and grid-connected converters can cause, in addition to the generation of unwanted current harmonics, a dc current component injection into the grid. This dc current component can lead to magnetic saturation of the distribution power transformers, leading to higher current distortion and ...
Giampaolo Buticchi, Emilio Lorenzani
openaire   +3 more sources

Research on Vibration of Transformer with DC Bias

Applied Mechanics and Materials, 2012
As the manufacturing technology of transformer getting more and more mature, issue of its vibration and noise is getting more and more attention. The vibration is more obviously when the transformer is running with DC Bias. 3D field-circuit coupling models of single-phase three-column power transformer was created by ANSYS. The simulating distributions
Bao Dong Bai, Bing Yin Qu, De Zhi Chen, Bo Zhang, Wu Hao Jia   +4 more
openaire   +1 more source

A simple apparatus for DC bias sputtering

Vacuum, 1970
This 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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Loss Imbalance and Transient DC-Bias Mitigation in Dual-Active-Bridge DC/DC Converters

IEEE Journal of Emerging and Selected Topics in Power Electronics, 2021
The triple-phase shift (TPS) modulation has been widely used in dual-active-bridge (DAB) converters to improve system efficiency but still has much greater potentials to be explored. Specifically, pulsewidth modulation (PWM) generation techniques are often not discussed, which, however, are found to be crucial to enhance the converter performances ...
Shien Wang, Chi Li, Kui Wang, Zedong Zheng, Yongdong Li   +4 more
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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, 2020
In 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, Cheng-Wei Chen, Jih-Sheng Lai 0001, Yu-Chen Liu   +3 more
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A simple DC bias elimination technique for Dual-Active-Bridge DC/DC converters

2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia), 2019
A new and simple DC bias elimination technique for a Dual-Active-Bridge DC/DC converter is proposed in this paper. The principle is to make the positive and negative volt-seconds of the magnetizing inductance balance when the phase shift changes. This can be done with minimum disruption on the overall control system by some minor modifications on the ...
Duy-Dinh Nguyen, Kazuto Yukita, Goro Fujita, Minh Cao Ta   +3 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), 2019
The 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, Jinggang Yang, Yang Liu, Yongyong Jia, Ruihuang Liu, Zhanfei Song   +5 more
openaire   +1 more source