Results 31 to 40 of about 1,874,316 (354)

A New Modular Multilevel AC/AC Converter Using HF Transformer

open access: yesIEEE Access, 2020
This paper proposes a new modular multilevel AC/AC converter using high-frequency (HF) transformer, which has the advantages of modular design, easy expansion, high power density, no circulation current, good output voltage waveform quality and low cost.
Yongqing Meng   +6 more
doaj   +1 more source

Convolution-Transformer Adaptive Fusion Network for Hyperspectral Image Classification

open access: yesApplied Sciences, 2022
Hyperspectral image (HSI) classification is an important but challenging topic in the field of remote sensing and earth observation. By coupling the advantages of convolutional neural network (CNN) and Transformer model, the CNN–Transformer hybrid model ...
Jiaju Li   +5 more
doaj   +1 more source

Low Voltage Power Supply Incorporating Ceramic Transformer [PDF]

open access: yes, 2007
A low voltage power supply provides the regulated output voltage of 1 V from the supply voltage around 48 V. The low voltage power supply incorporates a ceramic transformer which utilizes piezoelectric effect to convert voltage.
Imori, M, Kanada, Y
core   +1 more source

Electric Field Simulations and Analysis for High Voltage High Power Medium Frequency Transformer

open access: yesEnergies, 2017
The electronic power transformer (EPT) raises concerns for its notable size and volume reduction compared with traditional line frequency transformers.
Pei Huang, Chengxiong Mao, Dan Wang
doaj   +1 more source

High-Frequency Transformer Design for Modular Power Conversion From Medium-Voltage AC to 400 VDC

open access: yesIEEE transactions on power electronics, 2018
This paper presents a high-frequency modular medium-voltage AC (4160 VAC or 13.8 kVAC) to low-voltage DC (400 VDC) system that is scalable in order to be used for different scale microgrids.
Shishuo Zhao, Qiang Li, F. Lee, Bin Li
semanticscholar   +1 more source

Low and high frequency model of three phase transformer by frequency response analysis measurement

open access: yesOpen Physics, 2018
The behavior analysis of the transformer is usually achieved by the frequency response analysis (FRA), which is obtained by the application of a very low AC voltage in over a wide frequency range.
Chaouche Moustafa Sahnoune   +2 more
doaj   +1 more source

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

open access: yes, 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   +3 more
core  

Parent Quality of Life at Two Years Following Their Child's Completion of Acute Lymphoblastic Leukemia Treatment

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Parents of children treated for acute lymphoblastic leukemia (ALL) often experience significant caregiver burden and disruption to their well‐being. While parent quality of life (QoL) during treatment is well characterized, little is known about outcomes during early survivorship.
Sara Dal Pra   +3 more
wiley   +1 more source

High frequency wide-band transformer uses coax to achieve high turn ratio and flat response [PDF]

open access: yes, 1966
Center-tap push-pull transformer with toroidal core helically wound with a single coaxial cable creates a high frequency wideband transformer.
De Parry, T.
core   +1 more source

Achieving the desired transformer leakage inductance necessary in DC-DC converters for energy storage applications [PDF]

open access: yes, 2012
This paper presents a cost effective winding design and evaluation of a medium frequency isolation transformer typically used in bidirectional isolated DC/DC converters.
Asher, Greg   +5 more
core   +1 more source

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