Single-Phase Induction Motors

Single-Phase Induction Motors
The single-phase engine operates beneath the same principle as the polyphase electric 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 offered, a design mechanism is included to begin the motor. They are the various designations:

Torque-Speed Curves of Different Single-Phase Induction Motors

sprockets Shaded-pole: Have only one main winding no start winding. This configuration causes a shift of the applied magnetic field in relationship to the rotor, creating stating torque. Applications include fans and small appliances.

Split-Phase (induction start motor)
Has two sets of stator windings. The “start” windings sit 90 degrees to the “run” windings and shift the magnetic field of the stator, inducing beginning torque. Applications include small grinders, small followers, and blowers.

Capacitor-Start
The most common single-phase motor used in industrial applications. It really is a modified split-stage engine with a capacitor in series with the beginning winding to provide a start boost. Program include small conveyors, large 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 engine because no centrifugal starting switch is required. Applications include supporters and pumps in HVAC and refrigeration industries.

Tags:

Recent Posts