Analysis of vibration characteristics of amorphous alloy permanent magnet synchronous motor considering magnetostriction effect

: In comparison to silicon steel sheet motors, utilizing amorphous alloys for the motor core can enhance motor efficiency; however, their significant magnetostriction must be taken into account. Given the high magnetostriction of core materials, it is crucial to consider the impact of magnetostriction on motor vibrations. This paper initially derives the equivalent magnetostriction force and electromagnetic force based on an analytical model. By analyzing the magnetization curve and hysteresis strain curve, the radial magnetostriction force and electromagnetic force at the stator teeth of the amorphous alloy motor are examined using Ansys software. Subsequently, a broadband "electromagnetic-force-structure" multiphysics model of the amorphous alloy prototype is established to obtain the vibration characteristics of the prototype, and the spectral characteristics of magnetostrictive and electromagnetic force vibrations in the amorphous alloy motor are analyzed. Finally, the vibration characteristics of an 18-slot 4-pole amorphous alloy experimental prototype are experimentally measured and numerically analyzed. The study reveals that the magnetostriction effect exacerbates motor vibrations, although the primary source of vibration remains the electromagnetic force.