Most pumps and enthusiasts operating in commercial and industrial applications are currently driven by AC induction motors. “ACIM”, which stands for “alternating electric current induction motor”, can be an asynchronous type of motor that relies on electric current to carefully turn the rotor. Torque is produced by electric energy in the rotor. The electric current is generated through electromagnetic induction from the magnetic field of the stator windings. In an ACIM, the rotor permanent magnet synchronous motor usually rotates at a lower speed than the magnetic field. A “PMSM”, which stands for “permanent magnet synchronous engine”, depends on magnets to turn the rotor, which spins at the same velocity as the PMSM’s inner rotating magnetic field.

There are a few key differences between AC induction Motors and Permanent Magnet Synchronous Motors.