Most pumps and supporters operating in industrial and permanent magnet synchronous motor commercial 
applications are currently driven by AC induction motors. “ACIM”, which stands for “alternating electric current induction motor”, is an asynchronous kind of motor that relies on electric current to carefully turn the rotor. Torque can be produced by electric current in the rotor. The electric current is produced through electromagnetic induction from the magnetic field of the stator windings. In an ACIM, the rotor constantly rotates at a lesser speed compared to the magnetic field. A “PMSM”, which stands for “permanent magnet synchronous engine”, relies on magnets to turn the rotor, which spins at the same acceleration as the PMSM’s inner rotating magnetic field.
There are some key differences among AC induction Motors and Permanent Magnet Synchronous Motors.