Single-Phase Induction Motors
The single-phase motor operates under the same principle as the polyphase motor, except that the rotating magnetic field effect generated by the stator will not exist until running rpm is reached. Since no starting torque is obtainable, 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 begin winding. This configuration causes a shift of the used magnetic field in relationship to the rotor, creating stating torque. Applications include enthusiasts and small appliances.
chain sprocket Split-Phase (induction start electric motor)
Has two pieces of stator windings. The “start” windings are positioned 90 degrees to the “run” windings and shift the magnetic field of the stator, inducing starting torque. Applications include little grinders, small fans, and blowers.
The most common single-phase motor found in industrial applications. It is a modified split-stage engine with a capacitor in series with the beginning winding to supply a start boost. Program include small conveyors, huge blowers, pumps, and direct-drives.
Uses identical main and auxiliary windings with a capacitor to provide starting torque. They will be the most reliable single-phase motor because no centrifugal starting switch is required. Applications include enthusiasts and pumps in HVAC and refrigeration industries.