Experimental investigations on effect of core production attributes on transformer core loss performance

1998 ◽  
Vol 13 (2) ◽  
pp. 526-531 ◽  
Author(s):  
R.S. Girgis ◽  
E.G. te Nijenhuis ◽  
K. Gramm ◽  
J.-E. Wrethag
Keyword(s):  
Core Loss ◽  
Experimental Investigations ◽  
Transformer Core ◽  
Core Production

Online Condition Monitoring of Onboard Traction Transformer Core Based on Core-Loss Calculation Model

2018 ◽  
Vol 65 (4) ◽  
pp. 3499-3508 ◽  
Author(s):  
Qiang Fu ◽  
Jiaojiao Zhu ◽  
Zhi-Hong Mao ◽  
Guixin Zhang ◽  
Tefang Chen
Keyword(s):  
Condition Monitoring ◽  
Core Loss ◽  
Calculation Model ◽  
Loss Calculation ◽  
Transformer Core

Calculation and validation of iron loss in laminated core of power and distribution transformers

2013 ◽  
Vol 33 (1/2) ◽  
pp. 137-146 ◽  
Author(s):  
Xiaoyan Wang ◽  
Zhiguang Cheng ◽  
Li Lin ◽  
Jianmin Wang
Keyword(s):  
Magnetic Flux ◽  
Flux Density ◽  
Core Loss ◽  
Iron Loss ◽  
Magnetic Flux Density ◽  
Content Type ◽  
The Core ◽  
Distribution Transformers ◽  
The Impact ◽  
Transformer Core

Purpose – The purpose of this paper is to present a simple method to analyze the iron loss in the laminated core of power and distribution transformers. Design/methodology/approach – This paper presents a practical method to calculate the no-load loss in the transformer cores. Considering the non-uniformity of the magnetic flux density in the corner areas of the Epstein frames will affect the measurement precision of the Wt-B curves then further affect the core loss calculation in FEM, a dual-Epstein frame method is used to measure the Wt-B curves with the Epstein sample stripes cutting by different angles to the rolling direction. A 2D FEM that considers the type of joints of the core and eddy current effect in the laminations is used to analyze the core loss with multi-angle Wt-B curves. Findings – The impact of lamination thickness, size of gaps and type of joint of the core are considered. Considering the no-load testing conditions, harmonics in the exciting currents are taken into account. Originality/value – Harmonic wave of magnetic flux density in the transformer core is calculated and the core loss in the joint region is calculated by the loss curve measured with dual-Epstein frame. It makes the calculation result of transformer core loss more exactly.

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