Single-Phase Induction Motors
The single-phase engine 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 starting torque is available, 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 one main Single Phase Induction Motor china winding and no begin winding. This configuration causes a shift of the used magnetic field in romantic relationship to the rotor, creating stating torque. Applications consist of fans and small appliances.
Split-Phase (induction start motor)
Has two units 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 really is a modified split-phase engine with a capacitor in series with the beginning winding to provide a start boost. Software 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 will be the most reliable single-phase electric motor because no centrifugal starting switch is necessary. Applications include fans and pumps in HVAC and refrigeration industries.
