Single-Phase Induction Motors
The single-phase motor operates under 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 beginning torque is offered, a design system is included to begin 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 change of the applied magnetic field in relationship to the rotor, creating stating torque. Applications include supporters and small appliances.

Single Phase Induction Motor china Split-Phase (induction start motor)
Has two sets 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.

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

Permanent-Split-Capacitor (PSC)
Uses identical main and auxiliary windings with a capacitor to supply starting torque. They are the most reliable single-phase motor because no centrifugal beginning switch is necessary. Applications include fans and pumps in HVAC and refrigeration industries.