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 will not exist until running rpm is reached. Since no starting torque is obtainable, a design mechanism 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 start winding. This 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 engine)
Has two models of stator windings. The “start” windings are positioned 90 degrees to the “run” windings and shift the magnetic field of the stator, inducing starting torque. Applications include small grinders, small enthusiasts, 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 beginning 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 supply starting torque. They will be the most reliable single-phase engine because no centrifugal beginning switch is required. Applications include enthusiasts and pumps in HVAC and refrigeration industries.