Research On Vibration And Noise Reduction Methods Of Motors Considering Magnetostrictive Effect

The motor are used in the various fields of national economy and especially occupy an extremely important position in the petroleum,chemical,machinery manufacturing and other industries.At present,people’s material living standard is improving.The level of science and technology is increasing day by day.The performance of motor is facing severe challenge.Especially the demand of low vibration and noise motor is higher and higher.Electromagnetic noise is the main component of motor vibration and noise.Part of the electromagnetic noise is caused by the magnetostrictive effect of silicon steel sheet.The paper,the magnetostrictive effect in the motor stator silicon steel sheet and the adverse effect of the magnetostrictive effect on the motor are discussed firstly.The significance of the motor vibration and noise reduction method considering the magnetostrictive effect is explained.From the experiment,an experimental device for measuring the vibration of the motor stator is designed.Aiming at the phenomena in the experiment,a two-dimensional electromagnetic-mechanical coupling numerical model was established and the vibration characteristics of the motor caused by the magnetostrictive effect were calculated and analyzed in the finite element simulation software.The experimental results show the vibration of the motor considering the magnetostrictive effect.The paper focuses on solving the motor-noise and vibration-suppression problems caused by the magnetostrictive effect of silicon steel and proposes a method of filling soft magnetic composite materials possessing negative magnetostrictive properties to suppress motor noise and vibration.The basis is the magnetic permeability of filling material,together with the resistivity being consistent with that of silicon steel.The negative magnetostrictive deformation offsets the positive magnetostrictive deformation to reduce noise.The characteristics of the hole are chosen as mathematical model inputs;these characteristics include the size,deformation,and position of the hole.The inputs are set as the variables to be optimized,and the outputs approach zero after iteration.The size and value of holes are chosen as the optimization-algorithm input.The total stress of the entire motor stator is adopted as output.Calculation results show that the motor-stator stress decreases significantly.The method can guide the analysis of magnetostrictive effects on vibration noises of stator silicon steel and can serve as academic references for suppressing motor noises.