Single-Phase Induction Motors
The single-phase electric motor operates under 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 beginning torque is obtainable, a design mechanism is included to start the motor. They are the various designations:
Torque-Speed Curves of Different Single-Phase Induction Motors
Shaded-pole: Have only 1 main Single Phase Induction Motor china winding no begin winding. This configuration causes a change of the used magnetic field in relationship to the rotor, creating stating torque. Applications include supporters and small appliances.
Split-Phase (induction start electric motor)
Has two sets 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 small grinders, small enthusiasts, and blowers.
Capacitor-Start
The most typical single-phase motor found in industrial applications. It really is a modified split-phase engine with a capacitor in series with the beginning winding to supply a start boost. App include small conveyors, large 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 beginning switch is required. Applications include fans and pumps in HVAC and refrigeration industries.