Electromechanical transformation of power in a three-phase asynchronous motor during the circuit switchings-over of the stator windings

摘要

A mathematical model of a three-phase asynchronous motor in dynamic operating conditions is proposed which enables one to investigate transients in the motor and their action on the system of power supply and electric drive both at the symmetrical and asymmetrical switchings of the motor. The results of calculating electromechanical processes in a three-phase asynchronous motor with the short-circuited 4A 180M4Y3 rotor are presented for the phase-by-phase switching of the stator windings from delta to star connection and from star to delta connection. The results of experimental investigations of transients in a three-phase asynchronous motor with the short-circuited A 0JI2-32-4 rotor are presented for the circuit switchings of the windings.