The research of suppressing motor noise and vibration based on negative magnetostrictive effect

Noise suppression is one of the key issues to be solved in the design and application of the motor. Especially in larger motors, noise and vibration caused by the magnetostrictive effect of silicon steel accounted for a large proportion of the motor noise. This paper focuses on how to solve the problem of motor noise and vibration suppression caused by the magnetostrictive effect of silicon steel, and proposes a method that filling a soft magnetic composite materials that have negative magnetostrictive properties to suppress motor noise and vibration based on the filling material magnetic permeability and the resistivity of silicon being consistent with the silicon steel. The negative magnetostrictive deformation offset the positive magnetostrictive deformation so as to achieve the purpose of noise reduction. Create electromagnetic-mechanical coupling numerical model to calculate negative magnetostriction filler. Calculate the size and position of a reasonable distribution of the motor structure. This method is verified by Numerical Calculations.