Numerical analysis and experimental research of vibration and noise characteristics of oil-immersed power transformers

Miao, Xin; Pei, Jian; Pang, Fuzhen; Yang, Tao; Li, Haichao; Qu, Guanglei; Li, Jun

doi:10.1016/j.apacoust.2022.109189

Cited by 10 publications

(2 citation statements)

References 23 publications

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“…However, the influence of the edge effect was not considered. Based on the research status at home and abroad [6,[14][15][16][17][18][19], at this stage, scholars in various countries have focused on the study of electromagnetic vibration in rotating motors, and there are relatively few studies on the vibration and noise of linear motors and the LPST. One of the important research points is the influence of the end effect on the air gap electromagnetic force.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Vibration and Noise Analysis of Linear Phase-Shifting Transformer

Yan,

Zhao,

Yan

et al. 2024

Energies

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The advantages of adjustable angle phase-shifting and great expansibility make the linear phase-shifting transformer a novel type of power conversion device with a wide range of potential applications. However, during the procedure, there is a lot of noise. For the purposes of transformer design and vibration and noise reduction, it is crucial to investigate its electromagnetic vibration and noise. In this paper, the radial electromagnetic force wave considering the influence of the end effect as the source of the noise of the linear phase-shifting transformer was deduced and calculated. Based on this, the spectrum and space–time properties of the radial electromagnetic force waves were simulated and verified. Additionally, a finite element model was created using the Ansys Workbench 2022R1 platform to study the electromagnetic vibration and noise of the linear phase-shifting transformer. A joint simulation of the electromagnetic, structural, and sound fields was then performed. First, the transformer’s natural frequency was determined by modal analysis. After that, the transformer’s structure and the results of the transient electromagnetic field computation were combined and a harmonic response analysis was conducted to determine the vibration acceleration spectrum. Finally, in order to solve the sound pressure field, the transformer’s boundary vibration acceleration was coupled to the air domain. Furthermore, an analysis was conducted to determine the noise distribution surrounding the linear phase-shifting transformer. The joint simulation findings demonstrate that the linear phase-shifting transformer’s resonance, which produces larger electromagnetic vibration and noise, is indeed caused by the radial electromagnetic force. Simultaneously, the impact of the LPST core’s fixed components on the electromagnetic vibration and noise of the core was examined.

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Section: Introductionmentioning

confidence: 99%

Electromagnetic Vibration and Noise Analysis of Linear Phase-Shifting Transformer

Yan,

Zhao,

Yan

et al. 2024

Energies

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“…Numerical simulation with finite element (FE) modeling has demonstrated its remarkable efficiency in tackling dynamic problems of complex structures 37 , 38 . It offers substantial cost savings in the design phase as compared to laboratory testing.…”

Section: Introductionmentioning

confidence: 99%

Damping contribution of viscoelastic core on airborne sound insulation performance of finite constrained layer damping panels at low and middle frequencies

Wang,

Min

2023

Sci Rep

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The airborne sound insulation performance of finite sandwich panels is often significantly worsened by resonant transmission components in low and middle frequencies. In this paper, damping contribution of viscoelastic core on sound transmission loss (STL) of finite constrained layer damping (CLD) panels is studied in narrow frequency bands. A fully coupled layer-wise approach is used with a generalized high-order shear deformation hypothesis that accounts for all types of deformations in the core. The influence of several parameters is investigated extensively. Results show that the adverse impact of the first-three odd-odd order modes, namely (1,1), (3,1), and (1,3) modes, as well as some higher-order modes on STL cannot be disregarded. The constrained viscoelastic core plays a crucial role in enhancing, or even eliminating, dips of STL spectrum at resonant frequencies. Additionally, it can considerably counterbalance a relatively broadband reduction of STL caused by the inter-modal coupling in middle frequencies. The damping mechanism can be divided into two aspects: (i) the reduction of modal amplitude by vibration energy dissipation, and (ii) the change of bending modal shapes. CLD treatment is a concise and effective way to achieve stable sound insulation performance.

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Research on the Acoustic Field Restoration of UHV Reactor Based on Equivalent Transfer Impedance

Li,

Wei,

Liao

et al. 2024

Lecture Notes in Electrical Engineering

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Numerical analysis and experimental research of vibration and noise characteristics of oil-immersed power transformers

Cited by 10 publications

References 23 publications

Electromagnetic Vibration and Noise Analysis of Linear Phase-Shifting Transformer

Electromagnetic Vibration and Noise Analysis of Linear Phase-Shifting Transformer

Damping contribution of viscoelastic core on airborne sound insulation performance of finite constrained layer damping panels at low and middle frequencies

Research on the Acoustic Field Restoration of UHV Reactor Based on Equivalent Transfer Impedance

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