Analysis of transients at startup of cage induction motor: Acceleration stage

Abstract

For the in depth analysis of transients in a rotating induction motor the method of constant velocity is proposed, which allowed us to obtain analytical expressions for the currents and electromagnetic torque of the motor when selecting the d-q model as a starting point. The results of the theoretical analysis of transient cur rents and electromagnetic torque at the startup of the induction motor with a cage rotor are shown and the influ ence of the motor rotational frequency on them is determined. The results of the computer simulation of the induction motor startup confirm the validity of the analysis using the method of constant velocity.

Mitigation of switching effects on induction motor under star-delta scheme based energy conservation

“…4, Fig. 6 and Table II. Owing this impact, the stator is forced to have high current, causing considerable heating effects which extend to high Cu loss, winding damage and deterioration of insulation [11]. Apart from this, adverse effect on other loads connected to the same bus like voltage dip, voltage unbalance, flickering and circuit breaker malfunctioning.…”