VFDs and soft starters: is there really a competition ...
Jan 10, 2019· Where: N= speed, f=frequency and p=no. of poles. Want to learn more about VFD? Read Variable speed drive: Back to the features What is a soft starter? A softstarter (SS) is a thyristor based electronic device, used with AC electrical motors to temporarily reduce the torque in the power train, and the electric current surge of the motor during startup by controlling the conduction time of the ...