Effects of transformer core assembly on building factors

1992 ◽  
Vol 112 (1-3) ◽  
pp. 406-408 ◽  
Author(s):  
A. Basak ◽  
A.Aram Bonyar
Keyword(s):  
Building Factors ◽  
Transformer Core

Numerical and Experimental Determination of Local Building Factors of a Three-Phase Transformer Core Package

2019 ◽  
Vol 55 (2) ◽  
pp. 1-8
Author(s):  
Yusuke Kanto ◽  
Georgi Shilyashki ◽  
Helmut Pfutzner ◽  
Ivo Matkovic
Keyword(s):  
Experimental Determination ◽  
Three Phase ◽  
Building Factors ◽  
Transformer Core

Modelling transformer core joints using Gaussian models for the magnetic flux density and permeability

2010 ◽  
Vol 4 (9) ◽  
pp. 761 ◽  
Author(s):  
I. Hernández ◽  
F. de León ◽  
J.M. Cañedo ◽  
J.C. Olivares-Galván
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Magnetic Flux Density ◽  
Gaussian Models ◽  
Transformer Core

Capacitive short circuit detection in transformer core laminations

2008 ◽  
Vol 320 (20) ◽  
pp. e911-e914 ◽  
Author(s):  
Carl A. Schulz ◽  
Stéphane Duchesne ◽  
Daniel Roger ◽  
Jean-Noël Vincent
Keyword(s):  
Short Circuit ◽  
Transformer Core

Experiment and Simulation of Eddy-Current Loss inside Copper Shielding of Transformers under DC Biasing Condition

2011 ◽  
Vol 304 ◽  
pp. 41-47 ◽  
Author(s):  
Zhi Gang Zhao ◽  
Fu Gui Liu ◽  
You Hua Wang ◽  
Peng Xiang Ren ◽  
Yu Huai Kan
Keyword(s):  
Eddy Current ◽  
Three Dimensional ◽  
Eddy Current Loss ◽  
Copper Plate ◽  
Current Loss ◽  
Local Loss ◽  
Ac Power ◽  
Dc Biasing ◽  
Transformer Core ◽  
Excitation Conditions

With the advent of power electronic technology, the excitation conditions applied to transformers, motors, etc. could be very atypical. DC bias excitation is an undesired working condition of AC power transformers, the asymmetrical saturation of the transformer core, the heavy noise, the serious vibration, and the local loss concentration can all potentially occurred in dc-biased transformers. The effect of the exciting current under different dc-biased magnetization on eddy-current loss in copper plate based on a reduced engineering-oriented benchmark model (TEAM Problem 21) is investigated. Experiment scheme for dc biasing is presented and the distribution of the eddy current loss under different dc-biased excitation conditions was studied in detail. The engineering applicability of three dimensional eddy current analysis methods for dc-biased magnetization field computation and the practical loss modeling are examined, which has been demonstrated via the numerical modeling results and the measured data.

scholarly journals Reduction of Harmonics Cause of Inrush Current for Transformer

2020 ◽  
Vol 9 (5) ◽  
pp. 1-4
Keyword(s):  
Voltage Drop ◽  
Inrush Current ◽  
Source Impedance ◽  
Different Types ◽  
Current Reduction ◽  
Switching Method ◽  
The Impact ◽  
Transformer Core ◽  
Secondary Winding ◽  
Sequential Switching

Due to the impact of inrush current of transformer, made a voltage drop by source impedance as well as by sensitive loads. That’s why, necessary action is required to reduce the inrush current. Many factors like, secondary winding load, material of transformer core, Saturation flux/residual flux of transformer core, capacity of transformer, supply impedance, voltage-starting phase angle, are affecting the inrush current of transformer. Some different types of methods for inrush current reduction are listed in this paper. Out of that, sequential switching method is adopted for the reduction inrush current.

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