A Study on the Dynamics of an AC Induction Motor Rotor Based on the Analysis of Free Response at Impulse Excitation

Abstract This paper focuses on a topic frequently involved in the dynamics of transient phenomena rotary machines driven by an AC induction motor supplied three-phase four-wire electrical system: free response dynamic system mirrored torsional vibrations its rotor. is reducible at single degree freedom system, equivalent spring-mass-damper but as vibratory composed rotor (having moment inertia) rotating magnetic field stiffness) and hypothetical damper (generating viscous damping mainly due to air friction). useful mostly characterize transmissibility related conversion information from mechanical power through this system. A simple computer-assisted setup used describe indirectly analyze (generated when switched-on or after star delta commutation sequence), using active absorbed motor.