Transient vibration suppression of synchronous motor driving system with field circuit control

The present study deals with transient torsional vibration problems. To sup press the torsional vibrations during the starting period, a passive elemen t is inserted in the field circuit of a salient pole synchronous motor driv ing a high inertia load system. The optimal passive circuit parameters in t he starting field circuit control schemes are determined by the proposed pa rameter optimization algorithm with the unified quadratic vibration perform ance indices. Computer simulation and Fast Fourier-Transform (FFT) analysis show that the transient torsional vibrations can be considerably improved when the field circuit is connected to the proposed starting control scheme . The risk of premature component failure, due to the excess of the designe d limit for transient torsional stresses can also be diminished.