As a new type of power conversion device,linear phase-shifting transformer has the advantages of arbitrary angle phase-shifting and strong expansibility,and has broad application prospects.However,the noise is large during opera-tion.It is of great significance to study its electromagnetic vibration and noise for transformer design and vibration and noise reduction.This paper starts with the magnetostrictive effect,which is one of the sources of noise in linear phase-shifting transformers.The finite element model is established on the COMSOL Multiphysics platform,and the electromagnetic-struc-ture-sound field joint simulation is carried out.Firstly,the electromagnetic field analysis of the transformer is carried out to calculate the magnetic field distribution.Then the transient electromagnetic field calculation results are coupled with the transformer structure.The harmonic response analysis is carried out to obtain the vibration acceleration spectrum.Finally,the boundary vibration acceleration of the transformer is coupled to the air domain to solve the sound pressure field in the air do-main.The distribution of noise around the linear phase-shifting transformer is analyzed.The results show that the magneto-strictive force does cause the resonance of the linear phase-shifting transformer,resulting in electromagnetic vibration and noise at a fixed frequency.
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