Results 1 to 10 of about 58,229 (307)

An asymmetrical quadruple active bridge series resonant DC–DC converter for modular solid‐state transformers

IET Power Electronics
The DC–DC conversion stage of a three‐stage solid‐state transformer is the most challenging due to the combination of high power, medium voltage, and medium frequency. This combination also causes most of the losses in the DC–DC stage.
Saeid Khani, Seyed Hossein Hosseini, Mehran Sabahi   +2 more
doaj   +1 more source

Combination Optimization Configuration Method of Capacitance and Resistance Devices for Suppressing DC Bias in Transformers

Energies, 2019
The ground current of a high-voltage direct current (HVDC) transmission system can cause DC bias in transformers near the grounding electrode during monopole operations, which affects the alternating current (AC) power system operation. Owing to multiple
Donghui Wang, Chunming Liu
doaj   +1 more source

Burden resistor selection in current transformers for low power applications [PDF]

, 2014
In order to sense AC current with electric isolation in high frequency switching power converters the most simple and low cost solution is to consider a current transformer with a burden resistor.
Bargalló Perpiñá, Ramón, Conesa Roca, Alfons, Román Lumbreras, Manuel, Velasco Quesada, Guillermo   +3 more
core  

The effect of AM noise on correlation phase noise measurements [PDF]

, 2006
We analyze the phase-noise measurement methods in which correlation and averaging is used to reject the background noise of the instrument. All the known methods make use of a mixer, used either as a saturated phase detector or as a linear synchronous ...
Boudot, Rodolphe, Rubiola, Enrico
core   +3 more sources

A New Hard Switching Bidirectional Converter With High Power Density [PDF]

Journal of Intelligent Procedures in Electrical Technology, 2010
In this paper, a new isolated dc-dc bidirectional converter is proposed. This converter consists of two transformers (flyback and forward) and only one switch in primary side and one switch in secondary side of transformers.
Bahador Fani, Majid Delshad, Daryoosh Nazarpour   +2 more
doaj  

Superconducting fault current limiter application in a power-dense marine electrical system [PDF]

, 2011
Power-dense, low-voltage marine electrical systems have the potential for extremely high fault currents. Superconducting fault current limiters (SFCLs) have been of interest for many years and offer an effective method for reducing fault currents.
Blair, Steven Macpherson, Booth, Campbell, Burt, Graeme, Elders, Ian, McCarthy, J., Singh, Nand   +5 more
core   +1 more source

Development of an Electromagnetic‐Thermal Circuit Model for Single‐Phase Three‐Limb Transformers

High Voltage
Analysing the heat states of transformers under DC bias requires careful consideration of their own structural and material characteristics. Although the 3D finite element method (FEM) is a reliable way of simulating all the details of transformers, it ...
Yidan Hu, Jiawen Yu, Zhaoyu Zhang, Xuanrui Zhang, Junhao Li, Roberto Ottoboni   +5 more
doaj   +1 more source

Design Algorithm for and Validation of Winding Losses in Large-Capacity Medium-Frequency Distribution Transformers

Energies
Accurately calculating winding losses has always been a significant challenge in the design of large-capacity medium-frequency transformers. This paper presents an accurate design algorithm for calculating the winding losses of a large-capacity medium ...
Tao Jiang, Zhe Yang
doaj   +1 more source

Designing power inductors: practical solutions [PDF]

, 2011
An overview of losses and thermal aspects if power inductors is given. Most of the time core losses are given only for sine square wave, but users use it in square waves. Also bulk currents affect losses in larger inductors.
Van den Bossche, Alex
core   +1 more source

Topology and Control of Current-Fed Quadruple Active Bridge DC–DC Converters for Smart Transformers with Integrated Battery Energy Storage Systems

Energies
Smart transformers (STs), which are power electronic-based transformers with control and communication capabilities, facilitate managing future distribution grids with distributed generators (DGs) and battery energy storage systems (BESSs).
Kangan Wang, Zhaiyi Shen, Yixian Qu, Yayu Yang, Wei Tan   +4 more
doaj   +1 more source