Magnetostriction of Electrical Steel and Its Relation to the No-Load Noise of Power Transformers

Tanzer, Thomas; Pregartner, Helmut; Riedenbauer, Markus; Labinsky, Robert; Witlatschil, Michael; Muetze, Annette; Krischan, Klaus

doi:10.1109/tia.2018.2840977

Cited by 37 publications

(17 citation statements)

References 12 publications

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“…The magnetostrictive energy Im is used to get the magnetostrictive force. According to the virtual work principle, the magnetostrictive force fm can be expressed as follows: 11 where α is the Poisson Ratio. The magnetic stress can be expressed as:…”

Section: Gapmentioning

confidence: 99%

“…This phenomenon is referred as the magnetostrictive effect and magnetostrictive force. The magnetostrictive force is distorted in the airgap of the iron core when the magnetic field tends to saturate which signifies the electromagnetic vibration of the MCR [9][10][11]. To reduce the and noise caused by the vibration of the MCRs, the numerical models about simulating the electromagnetic force should be investigated, which will also be the basis for the optimization and design of the special structure motor [12,13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electromagnetic Vibration Analysis of Magnetically Controlled Reactor Considering DC Magnetic Flux

Ben

Chen

et al. 2020

IEEE Access

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The main factors of stress distribution in MCRs are the magnetostriction effect of the core materials and the magnetic force between gaps under DC bias excitation. This paper developed a coupling model for MCRs considering Maxwell magnetic force and magnetostriction under DC flux density biases. The constitutive equations of the magnetic field and strain field are constructed based on the magnetic property curves with a new measured and analyzed method to consider DC magnetic flux biases, which is the key contributions of this study. Then, the electromagnetic vibration properties of the MCR model are calculated and analyzed. To prove the validity of the proposed method, the vibration of a 4.4 kVar-220 V MCR is tested and analyzed. INDEX TERMS Magnetically controlled reactors, finite element analysis, electromagnetic vibration, magnetostriction.

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Section: Gapmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electromagnetic Vibration Analysis of Magnetically Controlled Reactor Considering DC Magnetic Flux

Ben

Chen

et al. 2020

IEEE Access

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show abstract

“…Previous studies have paid more attention to the no-load vibroacoustic characteristics analysis of conventional silicon steel sheet transformers [8][9][10][11][12] and amorphous alloy transformers [13][14][15]. Such studies found that the vibration and noise of a transformer mainly result from the magnetostrictive effect of the iron core.…”

Section: Introductionmentioning

confidence: 99%

Measurement Analysis and Improvement of Vibroacoustic Characteristics of Amorphous Alloy Transformer

Liu¹,

Zhang²,

Wu³

et al. 2022

Energies

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The amorphous alloy transformer has a smaller coercive force and lower specific iron loss. It precedes the conventional silicon steel sheet transformer from the perspective of energy conservation. However, amorphous alloy material has a more significant magnetostriction coefficient, resulting in stronger vibration and acoustic noise. This paper investigates the measurement, analysis, and improvement of vibroacoustic characteristics of one three-phase, four-frame amorphous alloy distribution transformer to reduce environment noise pollution. This study adopts a coupling analysis method of magnetic–force–acoustic multi-physical fields to analyze the vibroacoustic characteristics. It then introduces a novel combination method of magnetic field analysis and an electric circuit to improve the efficiency of magnetic field analysis. This new combination method can greatly reduce the solution time of multiple physical fields through comparison with the traditional field-circuit coupling method. Different from other studies, this paper studies the acoustic and vibration characteristics of an amorphous alloy transformer under both no-load and load conditions. It is found that the load vibration noise of an amorphous transformer is more severe than that of a traditional silicon steel transformer. Accordingly, the study measures the vibroacoustic characteristic with different excitations and load levels under different working conditions to verify the numerical analysis method. Furthermore, according to the analysis results, this paper suggests a few vibration and noise control strategies. In conclusion, the paper deduces an essential basis for exploring strategies of vibration reduction and noise control for amorphous alloy distribution transformers.

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“…Under the magnetic field provided by the winding current of ASR, the magnetic core is subject to Maxwell's electromagnetic force [9][10]. At the same time, the length and volume of ferromagnetic materials of core change slightly due to the core magnetization, which is called magnetostrictive effect and magnetostrictive force [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Study for Influence of Harmonic Magnetic Fields on Vibration Properties of Core of Anode Saturable Reactor in HVDC Converter Valve System

Wang

Gao

et al. 2021

IEEE Access

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The cores of anode saturated reactor (ASR) are the main vibration source of the HVDC converter valve system. The ASR is excited with an impulse voltage, which contains many harmonic components, and the magnetostriction of cores is usually the main reason of the ASR vibration. Therefore it is significant to study the influence of the harmonic on the vibration of core of ASR. In this paper, the magneto-mechanical coupling model is established based on the magnetostriction theory and the expression of vibration acceleration in the presence of third harmonic is derived. The vibration test platform is built to test the core's vibration acceleration. The magnetic and magnetostrictive properties of silicon steel sheet under different working conditions are measured. The three-dimensional simulation model of the core is established, and the vibration acceleration under different magnetic flux density is calculated. The comparison of the experiment and simulation results shows the rationality of the magneto-mechanical coupling model. The influence of third harmonic magnetic flux density on vibration is studied by changing the phase of the third harmonic magnetic flux density and the ratio of the third harmonic magnetic flux density to the fundamental magnetic flux density. Both the calculated and measured results show that the third harmonic magnetic flux density affects the vibration acceleration according to the double-frequency components of the third harmonic, as well the sum-frequency and difference-frequency components of the third harmonic and fundamental frequency.

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Magnetostriction of Electrical Steel and Its Relation to the No-Load Noise of Power Transformers

Cited by 37 publications

References 12 publications

Electromagnetic Vibration Analysis of Magnetically Controlled Reactor Considering DC Magnetic Flux

Electromagnetic Vibration Analysis of Magnetically Controlled Reactor Considering DC Magnetic Flux

Measurement Analysis and Improvement of Vibroacoustic Characteristics of Amorphous Alloy Transformer

Study for Influence of Harmonic Magnetic Fields on Vibration Properties of Core of Anode Saturable Reactor in HVDC Converter Valve System

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