Modelling methodology for transformer core vibrations based on the magnetostrictive properties

Li, Q.; Wang, X.; Zhang, L.; Lou, Junjie; Zou, Liang

doi:10.1049/iet-epa.2012.0144

Cited by 23 publications

(9 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 The structure of the core step-lap joint as well as of the supporting frame of the transformer tank is manipulated to suppress the noise in a single-phase amorphous HB1-core distribution transformer. 4 Core vibration resulting from the magnetostriction effect, 5 which is also a function of magnetization, was analyzed using finite element analysis (FEA). The proposed modeling methodology can be further utilized in vibration noise spectrum analysis.…”

Section: Introductionmentioning

confidence: 99%

Effects of magnetostriction and magnetic reluctances on magnetic properties of distribution transformers

Hsu

Lee

Cheng

et al. 2014

Journal of Applied Physics

View full text Add to dashboard Cite

This paper analyzes the causes of magnetic reluctance in silicon steel wound cores with multi step-lapped joint structures through the appropriate exploitation of simulated and experimental local flux distributions in an air-gapped core, to propose techniques that can enable the reduction of the resulting core loss and vibration. The magnetic magnetostriction forces in the lap-joint regions, constituting another significant source of permeability, can be controlled by rearranging the step-lapped joint structure. Then, the computed local flux distributions were compared with experimental data. Single-phase pad-mounted distribution transformers with a capacity of 167 kVA were used in this study. It is indicated that the multi-step lap joint can significantly reduce the core loss and exciting power by regulating the configuration of adjacent air-gapped distances. Finally, composite-core structures were also used to validate the reduction of magnetostriction, core loss, and vibrations, corresponding to single-phase distribution transformer. V C 2014 AIP Publishing LLC. [http://dx.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of magnetostriction and magnetic reluctances on magnetic properties of distribution transformers

Hsu

Lee

Cheng

et al. 2014

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…Modelling of magnetostriction of GO laminations has been proposed [8,22,[28][29][30]. However, these approaches are all based on the macroscopic scale of the material derived from magnetostriction measurements on Epstein strips.…”

Section: Contribution To Core Vibrationsmentioning

confidence: 99%

Magnetostriction in grain‐oriented electrical steels under AC magnetisation at angles to the rolling direction

Somkun

Moses

Anderson

2016

IET Electric Power Applications

View full text Add to dashboard Cite

Magnetostriction is an important source of vibration and acoustic noise in electromagnetic cores. This study reports magnetostriction components along the rolling, transverse and magnetisation directions (MDs) of grainoriented (GO) electrical steels, used for transformer and large rotating machine cores, under magnetisation at angles to the rolling direction (RD). Magnetostriction components in the sheet plane were simultaneously measured using a twodimensional magnetisation system. Results from the measurements agreed with the magnetostriction calculated from a simplified model of magnetic domain patterns in a 3% SiFe single crystal. It is shown that the magnetostrictive strain along the RD is always the highest component in the sheet plane irrespective of MD. This is expected to cause both additional vibration at the corners of transformer cores where flux deviates from the RD and high radial vibration in the back-iron regions of rotating machine stator cores assembled from segmented GO steel laminations.

show abstract

“…In [14], the two‐dimensional magnetostrictive feature of non‐oriented silicon steel sheets is simulated and measured. In [4], a vibration test on no‐load transformer is conducted, but it does not research the vibration characteristics on load transformer under DC disturbance.…”

Section: Introductionmentioning

confidence: 99%

Excitation–vibration harmonic response research of transformer in DC biasing operation

Pan

et al. 2018

IET Electric Power Applications

View full text Add to dashboard Cite

Aiming at the problem of transformer vibration in DC biasing operation, the relationship between excitation characteristics and vibration is studied. The electromagnetic coupling state equation of transformer in DC biasing operation is established. Then, the dynamic inductance and time-domain current are calculated based on the energy disturbance principle. On this basis, the identification method of exciting current is studied to present the excitation saturation state. The excitationvibration harmonic response model is constructed to analyse the relationship between the variation law of exciting current and vibration characteristics of the core under different DC levels. The correctness of this method is verified by the comparison between simulation and experimentation.

show abstract

Modelling methodology for transformer core vibrations based on the magnetostrictive properties

Cited by 23 publications

References 22 publications

Effects of magnetostriction and magnetic reluctances on magnetic properties of distribution transformers

Effects of magnetostriction and magnetic reluctances on magnetic properties of distribution transformers

Magnetostriction in grain‐oriented electrical steels under AC magnetisation at angles to the rolling direction

Excitation–vibration harmonic response research of transformer in DC biasing operation

Contact Info

Product

Resources

About