This article is intended to clarify and explain the operation of X13 ECM Motors that are currently being used in some HVACR equipment. Generally speaking, there are three motor types being used in air moving equipment.
PSC motors rely on the rotating magnetic field that is generated by the applied alternating voltage and corresponding alternating current to turn the rotor. The magnetic field rotates at 3,600 rpm (60 cycles per second). The rotor speed is determined by the number of poles or windings in the motor field.