Vibration control of inverter motor stator using added mass and Houde dampers

Abstract

This paper deals with the quenching problem of electromagnetic vibration of the inverter motor stator. The iron stator of the inverter motor is modeled by a perfect circular ring. Single or two Houde dampers are installed on the outside of the circular ring to quench the forced vibration caused by the rotating distributed electromagnetic force. Moreover, single mass is set also on the circular ring. The solutions of forced vibration are obtained by the theoretical analysis. The following were made clear; (1) When the angle between two Houde dampers is equal to that between loop and node of the mode to be quenched, the resonant amplitude of the stator is reduced most. (2) By setting not only two Houde dampers in the suitable positions, the setting angles are apart almost 35°～65°each other, but also setting single mass which is imperfection for perfect ring, the vibration of motor stator is quenched over wide frequency region around resonance. (3) By installing single Houde damper and single mass, the vibration of motor stator is quenched over wide frequency region around resonance also. (4) The results by the ring theory coincide with those by finite element method.