Acoustic Noise Characteristics and Magnetostriction of Fe-Si Powder Cores

Jang, Pyungwoo; Choi, Gwangbo

doi:10.1109/tmag.2011.2173563

Cited by 12 publications

(7 citation statements)

References 3 publications

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“…In fact, giant magnetostrictive materials (GMMs) are widely used in transduction applications. However the magnetostriction of ferromagnetic sheets used in electric devices such as transformers is an important source of noise [ 1 ]. Despite the low magnetostriction of those ferromagnetic sheets (on the order of some µm/m for silicon iron alloy), the magnetostriction effects can be amplified by structure resonance thus resulting in loud noise radiation.…”

Section: Introductionmentioning

confidence: 99%

An Anisotropic Model for Magnetostriction and Magnetization Computing for Noise Generation in Electric Devices

Mbengue

Buiron

Lanfranchi

2016

Sensors

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During the manufacturing process and use of ferromagnetic sheets, operations such as rolling, cutting, and tightening induce anisotropy that changes the material’s behavior. Consequently for more accuracy in magnetization and magnetostriction calculations in electric devices such as transformers, anisotropic effects should be considered. In the following sections, we give an overview of a macroscopic model which takes into account the magnetic and magnetoelastic anisotropy of the material for both magnetization and magnetostriction computing. Firstly, a comparison between the model results and measurements from a Single Sheet Tester (SST) and values will be shown. Secondly, the model is integrated in a finite elements code to predict magnetostrictive deformation of an in-house test bench which is a stack of 40 sheets glued together by the Vacuum-Pressure Impregnation (VPI) method. Measurements on the test bench and Finite Elements results are presented.

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Section: Introductionmentioning

confidence: 99%

An Anisotropic Model for Magnetostriction and Magnetization Computing for Noise Generation in Electric Devices

Mbengue

Buiron

Lanfranchi

2016

Sensors

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“…The change in length Δl of magnetic core due to magnetostriction can be expressed as a function based on the magnetic induction value of the externally applied magnetic field [16]. This function is usually represented as a magnetostriction graph that illustrates the correlation between magnetic induction values and caused change in length for electrical steel both in direction aligned to the magnetic induction vector and perpendicular to it [17].…”

Section: The Proposed Magnetostrictive Vibration Modelmentioning

confidence: 99%

Magnetostrictive Vibration Model for Evaluation of Mechanical Integrity of Power Transformer Magnetic Core

Marks

Vītoliņa

Dirba

2019

Latvian Journal of Physics and Technical Sciences

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Magnetostriction process creates vibrations within magnetic core of a power transformer. This effect can cause delamination of magnetic core layers and increase the vibration amplitudes on the surface of transformer tank. In this paper, a magnetostrictive vibration model is proposed for improved evaluation of the mechanical integrity of magnetic core and the finding of possible mechanical defects. This model is based on the simulation of magnetostrictive vibrations by replacing the magnetic core with mass and spring system, and application of a dynamic genetic algorithm in order to find the necessary system configuration. A case study is provided structurally modelling magnetic core in Matlab and Matlab Simulink with the analysis of simulated vibrations that indicate a possible mechanical defect.

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“…Because of the particularity of the working conditions, a flood of harmonics flow into the windings of the smoothing reactor and converter transformer [5,6,7]. Moreover, the existence of DC bias phenomenon in the UHVDC usually causes significant saturation in transformer cores, and gives rise to more violent vibration and heavier noise due to the magnetostrictive properties of silicon sheet steel [8,9,10].…”

Section: Introductionmentioning

confidence: 99%

Magnetostrictive Properties of the Grain-Oriented Silicon Steel Sheet under DC-Biased and Multisinusoidal Magnetizations

Zhao

Liu

et al. 2019

Materials

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As an intrinsic property, elasticity of soft material is affected significantly by the externally applied alternating magnetic field. Magnetostrictive properties of the grain-oriented (GO) silicon steel under DC-biased and multisinusoidal magnetizations are measured by using a laser-based measuring system. Magnetostriction curves of the GO silicon steel sheet under different magnetizations are obtained and the influence of frequency and DC bias on the magnetostrictive property is observed and analyzed based on the measured data. In addition, the spectrum of magnetostriction under harmonic magnetization is obtained, and the acoustic noise level of the GO silicon steel sheet represented by the A-weighted decibel value caused by magnetostriction is measured under DC-biased and multisinusoidal magnetizations. The measurement results are applied to the simulation of the three-limb laminated core model, and the effects of DC bias and harmonics on magnetic flux density and displacement are analyzed.

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Acoustic Noise Characteristics and Magnetostriction of Fe-Si Powder Cores

Cited by 12 publications

References 3 publications

An Anisotropic Model for Magnetostriction and Magnetization Computing for Noise Generation in Electric Devices

An Anisotropic Model for Magnetostriction and Magnetization Computing for Noise Generation in Electric Devices

Magnetostrictive Vibration Model for Evaluation of Mechanical Integrity of Power Transformer Magnetic Core

Magnetostrictive Properties of the Grain-Oriented Silicon Steel Sheet under DC-Biased and Multisinusoidal Magnetizations

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