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 obtainable, a design mechanism is included to begin the motor. They are the various designations:
Torque-Speed Curves of Different Single-Phase Induction Motors
Shaded-pole: Have only 1 main winding no start winding. This configuration causes a shift of the used magnetic field in romantic relationship to the rotor, creating stating torque. Applications consist of supporters 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 shift the magnetic field of the 
stator, inducing beginning torque. Applications include small grinders, small followers, and blowers.
Capacitor-Start
The most common single-phase motor found in industrial applications. It really is a altered split-stage motor with a capacitor in series with the start winding to provide a start boost. App include small conveyors, huge blowers, pumps, and Single Phase Induction Motor china 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 beginning switch is necessary. Applications include enthusiasts and pumps in HVAC and refrigeration industries.