Vibration Reduction of Inductors Under Magnetostrictive and Maxwell Forces Excitation

Rossi, Mathieu; Besnerais, Jean Le

doi:10.1109/tmag.2015.2469643

Cited by 40 publications

(13 citation statements)

References 13 publications

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“…A modal analysis using GetDP (Dular et al , 1998; Rossi and Lebesnerais, 2015) of the magnetic core gave the following results (Figure 7). Core material was considered isotropic with a Young’s modulus of 210 Gpa, a Poisson’s ratio of 0.3 and a density of 7,650 kg/m 3 .…”

Section: Modal Analysismentioning

confidence: 99%

Vibration and acoustic noise of industrial inductors associated to converters in the railway domain

Iamamura

Rossi

Hecquet

et al. 2016

COMPEL

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Purpose The purpose of this paper is to present an original study of industrial inductors with different air-gap materials in order to reduce the vibration and noise of inductors. Acoustic comfort is an increasingly important factor at the design stage of industrial inductors associated to converters. In addition, power converters in the railway domain are more and more compact and powerful. Design/methodology/approach Experiments, simulations and test devices were used to determine the main physical phenomena that generate the undesirable audible noise. Electric and vibratory measurements (modal and operational analysis) were compared with the numerical calculations. PWM and sinusoidal supply were taken into account and different prototypes with different materials in the air-gap were built. Findings This study analyzes and details the origin of the electromagnetic noise due to the vertical mode, in order to reduce the vibration and noise of inductors. A detailed analysis using finite element simulation and experimental measurements of free-free mode or forced mode under electrical excitation was conducted to interpret the vibrations of the structure. In addition, in order to observe trends and the impact of magnetostriction effect, the authors propose a simplified model. Practical implications Electric and vibratory measurements (modal and operational analysis) are compared with the numerical calculations. Originality/value This paper gives a response about the origin of the noise with different experimental measurements. Changing the air-gap material is beneficial for the deflection of the inductor. However, it has been presented that, following the shape of the inductor, it is beneficial to reduce or increase the stiffness of the material depending on the column height. For a fixed Young’s modulus air-gap, a ratio Column height/air-gap thickness exists, which makes it possible to cancel the deflection.

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Section: Modal Analysismentioning

confidence: 99%

Vibration and acoustic noise of industrial inductors associated to converters in the railway domain

Iamamura

Rossi

Hecquet

et al. 2016

COMPEL

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“…e vibration of the core (iron yoke and core limb) is one of the most important causes of the shunt reactor vibration. e core of the shunt reactor is composed of laminated silicon steel sheets, whose magnetic properties are related to the direction of lamination [6]: there are different lamination directions in different parts of the core. According to the rules governing the lamination of silicon steel sheets, three mutually perpendicular axes including RD, TD, and LD can be set; on this basis, a set of 3D coordinate systems is created.…”

Section: Laminated Coordinate Systemsmentioning

confidence: 99%

“…Excessive vibration is one of the most common problems in the operation of shunt reactors due to the air gaps in the core limb that provide large inductance [1]. e vibration of the core (iron yoke and core limb) is one of the most important causes of shunt reactor vibration [1][2][3][4][5][6][7][8][9]. e elastic deformation of the core in the magnetic field due to Maxwell force and magnetostriction is considered to be the main reason for shunt reactor core vibration [2].…”

Section: Introductionmentioning

confidence: 99%

A New 3D Method for Reactor Core Vibration Based on Silicon Steel Lamination Rules and Application in UHV Shunt Reactors

Lü

Guo

Niu

et al. 2019

Mathematical Problems in Engineering

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A new three-dimensional (3D) analysis method is proposed as the existing two-dimensional (2D) method has low accuracy in analysing the vibration characteristics of oil-immersed shunt reactors, such as ultrahigh-voltage (UHV) shunt reactors. First of all, a set of 3D laminated coordinate systems was defined based on silicon steel lamination rules, in which the anisotropy of magnetic properties for laminated silicon steel in the rolling direction (RD), the transverse direction (TD), and the lamination direction (LD) were considered. Then, the mapping between laminated coordinate systems and space rectangular coordinate system was established to unify the parameters in different laminated coordinate systems. With the mapping, the anisotropy of the magnetic properties in the laminated coordinate systems was transformed into a rectangular coordinate system. Next, two sets of comparative studies between the new 3D method and the traditional 2D method were carried out, which show that the 3D method has high precision and a wide application range. Finally, the relationship between air gap number and core vibration of UHV shunt reactors was studied by the new 3D method. The results show that, as the number of air gaps increases, the magnetic flux density and the total force area of Maxwell force are increased, resulting in the intensification of core vibration. The conclusions of this paper are helpful for the design of large oil-immersed reactors.

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“…Recently, magnetostriction induced vibration on electric devices such as electric machines [10], [11] and inductors [12], has received more and more attention. Studies of magnetostriction induced vibration and noise on power transformers are numerous: Mizokami et al [13] demonstrate that the compression stress along rolling direction of the electrical steel increases magnetostriction and noise level.…”

Section: State Of the Artmentioning

confidence: 99%

Reduction of Power Transformer Core Noise Generation Due to Magnetostriction-Induced Deformations Using Fully Coupled Finite-Element Modeling Optimization Procedures

et al. 2017

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This work focuses on the development of an algorithm for the prediction of transformer core deformation, using a fully coupled magneto-mechanical approach. An imposed magnetic flux method coupled with finite element modeling is employed for the magnetic resolution. The constitutive law of the material is considered with a simplified multi-scale model (SMSM) describing both magnetic and magnetostrictive anisotropies. Magnetostriction is introduced as an input free strain of a mechanical problem to get the deformation and displacement fields. A 3D estimation of acoustic power is carried out to evaluate the global core deformation and acoustic noise level. The numerical process is applied to a three-phase transformer made of Grain Oriented (GO) FeSi core, leading to a set of noise estimation for different flux excitations and core geometries.

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Vibration Reduction of Inductors Under Magnetostrictive and Maxwell Forces Excitation

Cited by 40 publications

References 13 publications

Vibration and acoustic noise of industrial inductors associated to converters in the railway domain

Vibration and acoustic noise of industrial inductors associated to converters in the railway domain

A New 3D Method for Reactor Core Vibration Based on Silicon Steel Lamination Rules and Application in UHV Shunt Reactors

Reduction of Power Transformer Core Noise Generation Due to Magnetostriction-Induced Deformations Using Fully Coupled Finite-Element Modeling Optimization Procedures

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