a motor that rotates at the same rotational speed as the speed of the rotating magnetic field determined with the power supply frequency upon employing a laminated core of a permanent magnet or a ferromagnetic body such as iron as the rotor
an induction motor that operates directly from AC power and rotates at an exact multiple of the line frequency
Runs with out slippage. Used in elevators and compressors frequently, but seldom used in pumping. Pumps mostly use induction or "squirrel cage" motors.
Type of AC electric motor in which rotational speed is related directly to frequency of power supply.
An ac motor whose rotor is activated by dc. It is characterized by constant speed and requires squirrel-cage windings or some other method to be self-starting.