3000 rpm ac 3 phase motor is good or 1500 rpm, for same kilowatt please explain?
Depends upon your requirment. If your application required higher speed then 3000 rpm motor os good. If your equipment desigen for lower speed then 1500 rpm motor is good.
Kilowatt output = torque(N-m) X speed(RPM) / 9549 A 1500 RPM motor producing twice as much torque as a 3000 RPM motor produces the same output power.
