Single-Phase Induction Motors
The single-phase electric motor operates beneath the same principle as the polyphase electric motor, except that the rotating magnetic field effect generated by the stator does not exist until running rpm is reached. Since no beginning torque is obtainable, a design system is included to begin the motor. These are the various designations:
Torque-Speed Curves of Different Single-Phase Induction Motors
Shaded-pole: Have only 1 main chain sprocket winding no start winding. This configuration causes a change of the used magnetic field in relationship to the rotor, creating stating torque. Applications include supporters and small appliances.
Split-Phase (induction start motor)
Has two pieces of stator windings. The “start” windings sit 90 degrees to the “run” windings and shift the magnetic field of the stator, inducing beginning torque. Applications include little grinders, small fans, and blowers.
The most typical single-phase motor used in industrial applications. It really is a altered split-phase electric motor with a capacitor in series with the start winding to supply a start boost. Software include small conveyors, large blowers, pumps, and direct-drives.
Uses identical primary and auxiliary windings with a capacitor to provide starting torque. They will be the most reliable single-phase engine because no centrifugal starting switch is necessary. Applications include supporters and pumps in HVAC and refrigeration industries.