Single-Phase Induction Motors
The single-phase motor operates beneath the same Single Phase Induction Motor china principle as the polyphase engine, except that the rotating magnetic field effect produced by the stator does not exist until running rpm is reached. Since no beginning torque is obtainable, a design system 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 and no begin winding. This configuration causes a shift of the applied magnetic field in relationship to the rotor, creating stating torque. Applications consist of fans and small appliances.
Split-Phase (induction start 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 starting torque. Applications include little grinders, small enthusiasts, and blowers.
The most common single-phase motor used in industrial applications. It is a altered split-stage engine with a capacitor in series with the beginning winding to supply a start boost. Program include small conveyors, large blowers, pumps, and direct-drives.
Uses identical main and auxiliary windings with a capacitor to supply starting torque. They will be the most reliable single-phase motor because no centrifugal starting switch is necessary. Applications include supporters and pumps in HVAC and refrigeration industries.