Vibration analysis of small power transformer
ISSN: 0332-1649
Article publication date: 13 July 2010
Abstract
Purpose
The purpose of this paper is to present a methodology of identification and calculating vibrations of power transformers caused by magnetostriction.
Design/methodology/approach
All calculations are based on finite element approach. Electromagnetic model uses 2D time stepping solution in nonlinear continuum of the core accompanied with equivalent representation of overlapping areas. Structural model is 3D with special representation for laminated core limbs. Theoretical results are compared with experimental ones obtained as operational deflection shapes from vibration measurements.
Findings
Tensor representation of magnetostriction stress enables calculation of equivalent forces acting on arbitrary chosen parts of laminated core. These forces converted into amplitude and phase of Fourier spectrum and introduced into structural model make possible to get displacement field with reasonable accuracy.
Research limitations/implications
Assumption of magnetic isotropy of the transformer core is the main simplification during analysis.
Practical implications
It was proved that small deformation of the core structure originated from assembly technology may be the reason of substantial growth of the vibration level.
Originality/value
This paper provides a step‐by‐step explanation of how to get core vibration starting from magnetic field distribution.
Keywords
Citation
Kubiak, W. and Witczak, P. (2010), "Vibration analysis of small power transformer", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 29 No. 4, pp. 1116-1124. https://doi.org/10.1108/03321641011044532
Publisher
:Emerald Group Publishing Limited
Copyright © 2010, Emerald Group Publishing Limited