Research on Vibration and Noise of Induction Motor under Variable Frequency

Studies have substantiated that the vibration and noise produced by iron core of an electromagnetic device are closely related to magnetostriction silicon steel sheet. Moreover, when induction motor works under condition frequency conversion, symmetry sheet will change, distribution field be asymmetric, which aggravate noise. This paper completes experimental measurement analysis characteristics magnetostrictive sheets. The magnetic a 1140 V/75 kW variable-frequency is calculated analytically based on analytical method, stator/rotor intensity permeance separately obtain air gap density radial force. analyzed finite element while magnetization curve characteristic different conditions considered. An platform built measure analyze displacement acceleration variable motor, verifies correctness proposed scheme. Considering influence effect make result calculating motors more accurate.