Single-Phase Induction Motors
The single-phase motor operates beneath 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 obtainable, a design mechanism is included to start the motor. These are the various designations:
Torque-Speed Curves of Different Single-Phase Induction Motors
Shaded-pole: Have only 1 main winding no begin winding. This configuration causes a shift of the applied magnetic field in relationship to the rotor, creating stating torque. Applications include followers and small appliances.
Split-Phase (induction start electric motor)
Has two pieces 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 little grinders, small followers, and blowers.
Capacitor-Start
The most common single-phase motor used in industrial applications. It is a altered split-stage electric motor with a Single Phase Induction Motor china capacitor in series with the beginning winding to provide a start boost. Application include small conveyors, huge blowers, pumps, and direct-drives.
Permanent-Split-Capacitor (PSC)
Uses identical main 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 required. Applications include supporters and pumps in HVAC and refrigeration industries.