Single-Phase Induction Motors
The single-phase engine operates under 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 starting torque is available, a design system 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 no begin winding. This configuration causes a change of the applied magnetic field in relationship to the rotor, creating stating torque. sprockets applications consist of followers and small appliances.
Split-Phase (induction start electric motor)
Has two models of stator windings. The “start” windings are positioned 90 degrees to the “run” windings and change the magnetic field of the stator, inducing beginning torque. Applications include small grinders, small supporters, and blowers.
The most typical single-phase motor used in industrial applications. It is a altered split-phase engine with a capacitor in series with the beginning winding to provide a start boost. Software include small conveyors, huge blowers, pumps, and direct-drives.
Uses identical main and auxiliary windings with a capacitor to provide starting torque. They are the most reliable single-phase engine because no centrifugal beginning switch is required. Applications include supporters and pumps in HVAC and refrigeration industries.