Single-Phase Induction Motors
The single-phase electric motor operates under the same principle as the polyphase engine, except that the rotating magnetic field effect generated by the stator will not exist until running rpm is reached. Since no beginning torque is available, a design mechanism is Single Phase Induction Motor china 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 and no begin winding. This configuration causes a shift of the used magnetic field in 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 supporters, and blowers.
Capacitor-Start
The most typical single-phase motor used in industrial applications. It really is a altered split-phase engine with a capacitor in series with the start winding to supply a start boost. App include small conveyors, huge 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 engine because no centrifugal starting switch is necessary. Applications include supporters and pumps in HVAC and refrigeration industries.