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 does not exist until running rpm is reached. Since no starting torque is offered, a design system is included to start 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 romantic relationship to the rotor, creating stating torque. Applications include fans and small appliances.

Split-Phase (induction start engine)
Has two sets of stator windings. The “start” sprockets windings are positioned 90 degrees to the “run” windings and change the magnetic field of the stator, inducing starting torque. Applications include little grinders, small followers, and blowers.

Capacitor-Start
The most common single-phase motor found in industrial applications. It really is a altered split-phase electric motor with a capacitor in series with the beginning winding to provide a start boost. Program include small conveyors, large blowers, pumps, and direct-drives.

Permanent-Split-Capacitor (PSC)
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 fans and pumps in HVAC and refrigeration industries.