INFLUENCE OF TORSIONAL STIFFNESS OF SHAFTING ON SYMMETRICAL INDUCTION MACHINE STABILITY

The influence both of the mechanical transmission torsional stiffness (shafts, gears etc. ) and of rotational inertias of rotors on the stability of the system consisting of the induction machine mechanically coupled with an operating or driving machine is investigated. The study ascertains the effect of the mechanical parameters on the regions of machine instability in the slip-torque plane. The curves bounding the instability regions for a given system, show that the hypothesis, about the mechanical part of the system, assumed in previous works constitute boundary conditions.