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Impact of the Foucault Current and Its Vibration Noise Reduction on Bracket Features for AMDT

CES Transactions on Electrical Machines and Systems 2023年第3期7卷 330-340页

作者： kammeugue noubissi romaric Daosheng Liu Boxue Du School of Electrical Engineering and Automation Jiangxi University of Science and TechnologyGanzhou 341000China IEEE School of Electrical Engineering and Automation Tianjin UniversityTianjin 300072China

This manuscript explores the influences of the Foucault current on bracket vibration. Noise measurements are obtained in conditions that the coils are enclosed by the bracket, and exposed to the air for confirming the impact of Foucault current on bracket vibration. The outcomes illustrate that the bracket increases the primary noise to 21 d B. Throughout investigational modal computation, ordinary frequencies of the coils stay afar from the exciting frequency of 100 Hz but the ordinary frequency 72.924 Hz of the bracket stands near to 100 Hz, which similarly explicates the upsurge of the noise level. To do the computations on bracket vibrations instigated by the Foucault current, a finite-element method(FEM) has been utilized for evaluating the eddy current density, electromagnetic forces(EMF), coupled with bracket response in frequency domain. The calculations displayed a proper approval by mean of theoretic investigations, and the simulations analyzed effectively the bracket vibration produced by Eddy current, and the electromagnetic force(EMF). Referring to the simulation, the primary vibration characteristics, and noise level, the method by applying weights(stress) on the top bracket of transformer is proposed to lessen the vibration amplitude, and noise level. To indorse the utility, and application of the suggested technique, the experiment results are obtained, analyzed, and compared with those of simulations, primary vibration characteristics, and noise level.

关键词： Amorphous transformer Finite element method Vibration displacement Sound level

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维普期刊数据库

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Investigation on Vibration Characteristics of Amorphous Metal Alloy Core Dry-type Distribution Transformer

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CES Transactions on Electrical Machines and Systems 2022年第3期6卷 324-331页

作者： kammeugue noubissi romaric Daosheng Liu Boxue Du School of Electrical Engineering and Automation Jiangxi University of Science and TechnologyGanzhou341000China IEEE the School of Electrical Engineering and Automation Tianjin UniversityTianjin 300072China

Large power transformers have severe vibration and noise problems. Thus, as the source of noise, it is vitally important to have accurate core vibration calculations. The calculation of the vibration is incredibly difficult to consider the complex propagation pathway of the vibration in the clamp and the Amorphous Metal Alloy Core Distribution Transformer(AMACDT). To understand the vibration characteristics of AMACDT, this manuscript provides a different approach on investigation of the vibration characteristics of an SCBH15-200/10 type. Based on the vibration characteristics calculation and displacement of an Amorphous Metal Alloy Core Distribution Transformer(AMACDT), they are obtained and solved using Finite Element Analysis software(FEA). Conferring to the outcomes of the vibration analysis, the method by adding bar-reinforcements on the upper clamp of transformer is proposed to lessen the vibration amplitude. To verify the usefulness and application of the suggested approach, the analytical results are obtained. The suggested approach is analyzed with those of experimental.

关键词： Amorphous transformer Finite element analysis Vibration displacement

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维普期刊数据库

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