Single-Phase Induction Motors
The single-phase engine operates beneath the same principle as the polyphase electric motor, except that the rotating magnetic field effect produced by the stator will not exist until sprockets 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 1 main winding and no begin winding. This configuration causes a change of the used magnetic field in relationship to the rotor, creating stating torque. Applications consist of supporters 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 shift the magnetic field of the stator, inducing starting torque. Applications include little grinders, small followers, and blowers.
Capacitor-Start
The most typical single-phase motor found in industrial applications. It really is a modified split-stage electric motor with a capacitor in series with the beginning winding to provide a start boost. App include small conveyors, large blowers, pumps, and direct-drives.
Permanent-Split-Capacitor (PSC)
Uses identical primary and auxiliary windings with a capacitor to provide starting torque. They are the most reliable single-phase motor because no centrifugal starting switch is necessary. Applications include supporters and pumps in HVAC and refrigeration industries.