Operation in asynchronous overload of synchronous motor. Effect of damping windings

Abstract

In this paper there is detailed the asynchronous operation caused by an important overload, of a synchronous motor. There are mentioned the currents of all the windings, main flux, electromagnetic torque, electrical angular speeds of the rotating field and of the rotor which define the amplitudes of the electrical, magnetic and mechanical stresses. The effect of the damping windings resistance in this complicated dynamic process is analyzed. The simulation results must be turned to account with necessity in the design stage, as well as in the industrial practice for pre-establishing the dynamic behaviour of a synchronous motor, subdued to a certain overload state.