インバータモータの実用的制振

抄録

This paper deals with practical vibration control of electromagnetic vibration of the inverter motor stator. The iron stator of the inverter motor is modeled by a perfect circular ring. To quench the forced vibration of the stator caused by the rotating distributed electromagnetic force, single mass is set on the circular stator, and it is supported by the two springs. Moreover, two Houde dampers are installed on the outside of the circular stator. The solutions of forced vibration are obtained by using the ring theory and the finite element method. The following were made clear; (1) By setting an mass at the position of hoop of cos mode and setting spring supports at the position of hoop of sin mode, those resonance frequencies are separated enough each other. As a result, the vibration amplitude of motor stator becomes lower. (2) Moreover by setting two Houde dampers with the interval of hoop and node of the considered mode, the vibration of stator is quenched over wide frequency region around the resonance. (3) It is shown by the finite element method that the legs of motor stator have the similar effect as spring supports. (4) The results obtained by the ring theory coincide with those by the finite element method qualitatively.