NDLI: Electromagnetic vibration noise analysis of transformer windings and core

Content Provider	IET Digital Library
Author	Jingzhu, Hu Dichen, Liu Qingfen, Liao Yang, Yan Shanshan, Liang
Abstract	Analyses of transformer electromagnetic vibration noise are presented in this study. A finite element model is established which combines transient electromagnetic field analysis, mechanical field analysis and acoustic analysis to calculate the sound pressure level of the radiated noise around the transformer. Transient electromagnetic field analysis is performed to get the Lorentz, reluctance magnetic forces and magnetostriction according to Maxwell theory and virtual displacement principle. Mutual influence of strain and magnetisation has been considered. The main frequency components of harmonic electromagnetic excitations are analysed by Fourier transformation so as to carry out the harmonic response analysis and obtain the nodes displacements of the windings and core. The noise distribution is further calculated by acoustic analysis based on the achieved vibration data. Comparison of calculated results and measured data verifies that the combined noise calculating model is applicable for transformer noise prediction.
Starting Page	251
Ending Page	257
Page Count	7
ISSN	17518660
Volume Number	10
e-ISSN	17518679
Issue Number	Issue 4, Apr (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/10/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2015.0309
Journal	IET Electric Power Applications
Publisher Date	2016-04-01
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Acoustic Analysis Electromagnetic Field Electromagnetic Vibration Noise Analysis Finite Element Analysis Finite Element Model Fourier Transformation Fourier Transforms Harmonic Electromagnetic Excitations Harmonic Response Analysis Inductors And Transformer Integral Transforms in Numerical Analysis Lorentz Forces Magnetic Core Magnetic Forces Magnetostriction Maxwell Theory Mechanical Engineering Mechanical Field Analysis Noise Calculating Model Numerical Analysis Reluctance Magnetic Forces Sound Pressure Level Transformer And Reactors Transformer Core Transformer Cores Transformer Electromagnetic Vibration Noise Analysis Transformer Noise Prediction Transformer Windings Transient Electromagnetic Field Analysis Vibrations Vibrations And Shock Wave Virtual Displacement Principle
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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