Single-Phase Induction Motors
The single-phase motor operates beneath the same principle as the polyphase motor, except that the rotating magnetic field effect produced by the stator will not exist until running rpm is reached. Since no starting torque is available, 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 begin winding. This configuration causes a shift of the applied magnetic field in relationship to the rotor, creating stating torque. sprockets 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 starting torque. Applications include little grinders, small enthusiasts, and blowers.
Capacitor-Start
The most common single-phase motor found in industrial applications. It really is a altered split-stage electric motor with a capacitor in series with the beginning winding to supply a start boost. Application 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 are the most reliable single-phase electric motor because no centrifugal starting switch is required. Applications include enthusiasts and pumps in HVAC and refrigeration industries.