Single-Phase Induction Motors
The single-phase electric motor operates beneath the same principle as the polyphase motor, except that the rotating magnetic field effect generated by the stator will not exist until running rpm is reached. Since no starting 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 Single Phase Induction Motor configuration causes a shift of the applied magnetic field in romantic relationship to the rotor, creating stating torque. Applications consist of enthusiasts and small appliances.
Split-Phase (induction start motor)
Has two models of stator windings. The “start” windings sit 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 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 supply a start boost. Software 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 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.