Results 271 to 280 of about 2,950,870 (336)

Modeling of Anisotropic Magnetostriction Under DC Bias Based on an Optimized BP Neural Network

IEEE transactions on magnetics, 2020
The existence of direct current (dc) bias magnetic field changes the magnetostrictive properties of electrical steel sheets (ESSs) and intensifies the vibration and noise of transformers.
Zhen Wang, Yanli Zhang, Z. Ren, C. Koh, Osama A. Mohammed   +4 more
semanticscholar   +1 more source

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

GaN-Half-Bridge for Core Loss Measurements Under Rectangular AC Voltage and DC Bias of the Magnetic Flux Density

IEEE Transactions on Instrumentation and Measurement, 2020
An accurate calculation of core losses is essential for the design of switched-mode power supplies. However, such predictions remain a challenge as core losses depend on various parameters, e.g., the waveform of the magnetic flux density, including its ...
E. Stenglein, B. Kohlhepp, D. Kübrich, M. Albach, T. Dürbaum   +4 more
semanticscholar   +1 more source

A new auto-bias method for digital control dc-dc converter

2011 International Conference on Electrical Machines and Systems, 2011
Main content of this paper is a new auto-bias method for digital control dc-dc converter. In the proposed method, not only the P-I-D control as the feedback one but also the new auto-bias method as the feedforward one is used. The new auto-bias method consists of two superior functions.
Fujio Kurokawa, Junya Sakemi, Akihiro Yamanishi, Hiroyuki Osuga   +3 more
openaire   +1 more source

Frequency and dc bias voltage dependent dielectric properties and electrical conductivity of BaTiO3SrTiO3/(SiO2)x nanocomposites

Ceramics International, 2019
BaTiO3 SrTiO3/(SiO2)x nanocomposites (x = 0, 0.5, 1, 2 and 5%) were produced through solid state reaction. The morphological, structural, spectral, and optical properties were investigated by scanning electron microscope, X-ray powder diffraction (XRD ...
Yassine Slimani, B. Unal, E. Hannachi, A. Selmi, M. Almessiere, M. Nawaz, A. Baykal, I. Ercan, M. Yıldız   +8 more
semanticscholar   +1 more source

Dielectric, piezoelectric and dc bias characteristics of Bi-doped PZT multilayer ceramic actuator

, 2020
In this study, the microstructure, dielectric, piezoelectric and dc bias properties of the Bi-doped PZT (PZTB) multilayer piezoelectric actuators, have been discussed.
Shuhao Yan, Chaochao Sun, Qianyue Cui, M. He, Willhandy, R. Wang, J. Hao, Xiangcheng Chu   +7 more
semanticscholar   +1 more source

DC bias suppression in diffraction patterns

Optics Communications, 1972
Abstract A Smith polarization interferometer is used for the suppression of the influence of the dc bias light level in optical diffraction patterns. Its application results in an improved detectability of low-frequency diffraction orders.
openaire   +1 more source

Impact of DC bias on differential protection of converter transformers

, 2020
Converter transformers in high-voltage direct current (HVDC) systems are often subjected to DC bias induced by earth return currents (ERCs) from HVDC systems or by geomagnetically induced currents (GICs).
Yucong Zhao, P. Crossley
semanticscholar   +1 more source

A Method for Detecting DC Bias in Transformer of Dual Active Bridge DC-DC Converter

2021 IEEE 12th Energy Conversion Congress & Exposition - Asia (ECCE-Asia), 2021
A potential concern with the isolation transformer in a dual active bridge DC-DC converter (DAB) unit is the DC bias of magnetization. With the influence of DC bias, the loss of the transformer increases, and the lifespan decreases. However, it is difficult to accurately measure the small DC component mixed in a large (>10A peak), high-frequency AC ...
Guanqun Qiu, Li Ran, Huaping Jiang, Teng Long, Andrew Forsyth, WeiHua Shao   +5 more
openaire   +1 more source

Correlation between tetragonality (c/a) and direct current (dc) bias characteristics of BaTiO3-based multi-layer ceramic capacitors (MLCC)

, 2020
The influence of tetragonality (c/a) of the dielectrics of BaTiO3-based multi-layer ceramic capacitors (MLCC) on the direct current (dc) bias characteristics was investigated.
S. Yoon, Mi-Yang Kim, Donghun Kim
semanticscholar   +1 more source