Multi-mode Vibration Suppression for Electric Machines using Passive Dynamic Vibration Absorbers Mounting on Stator Outer Peripheral

This paper presents multi-mode vibration suppression of electromechanical systems using a passive dynamic vibration absorber attached to a stator outer peripheral of an electric machine. The principle of vibration generation in an electric motor is explained. Subsequently, the structure and design procedure of passive dynamic vibration absorber for each vibration mode. The arrangement of these passive dynamic vibration absorbers on the stator periphery is then examined. Finally, the multi-mode vibration suppression effect is validated through hammering tests using a stator core with fabricated passive dynamic vibration absorbers attached.