Single-Phase Induction Motors
The single-phase engine operates under the same principle as the polyphase engine, except that the rotating magnetic field effect produced by the stator will not exist until running rpm is reached. Since no beginning torque is available, a design mechanism is included to begin the motor. They are the various designations:
Torque-Speed Curves of Different Single-Phase Induction Motors
Shaded-pole: Have only one main winding and no start winding. This configuration causes a shift of the applied magnetic field in relationship to the rotor, creating stating torque. Applications consist of enthusiasts and small appliances.
Split-Phase (induction start engine)
Has two units of stator windings. The “start” windings sit 90 degrees to the “run” windings and change the magnetic field of the stator, inducing starting torque. Applications include little grinders, small supporters, and blowers.
The most common single-phase motor used in industrial applications. It is a modified split-stage motor with a capacitor in series with the start winding to provide 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 chain sprocket electric motor because no centrifugal starting switch is required. Applications include supporters and pumps in HVAC and refrigeration industries.