Performance improvement in AC-AC SCR controller

Torsional Torques Reduction in Starting of Three-Phase Induction Motor

“…However, these methods are not paying attention to the stress on motor shaft. Moreover, these methods aggravate the stress on the utility grid by reducing the input power factor and increase the magnitude/number of injected harmonics particularly low order harmonics [7,9]. In the large IM, the pulsations in motor electromagnetic torque during the direct start/conventional soft starting stress the shaft to/beyond the limit.…”

“…This is attributed to pulsations in electromagnetic torque during starting. Numerous starting techniques were reported in the literature [1][2][3][4][5][6][7][8][9] for the three-phase induction motor. Most of these techniques are focused in reducing the stress on the grid by reducing the starting currents.…”