Single-Phase Induction Motors

Single-Phase Induction Motors
The single-phase engine operates under the same principle as the polyphase electric motor, except that the rotating magnetic field effect produced by the sprockets stator does not exist until running rpm is reached. Since no beginning torque is available, a design system is included to begin the motor. These are the various designations:

Torque-Speed Curves of Different Single-Phase Induction Motors

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

Split-Phase (induction start motor)
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 typical single-phase motor found in industrial applications. It really is a altered split-phase engine with a capacitor in series with the beginning winding to provide a start boost. Software include small conveyors, large blowers, pumps, and 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 electric motor because no centrifugal starting switch is necessary. Applications include followers and pumps in HVAC and refrigeration industries.

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