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What is Single Phase Motors

Single-phase induction motors are the most familiar of all electric motors because they are used in home appliances, businesses, and small industries. Single-phase induction motors have usually two poles or four poles and rated at 2 hp or less.

In a single-phase motor we have only a single field winding excited with alternating current; therefore, it does not have a revolving field like three-phase motors. Thus, it does not self-starting. Several methods have been devised to initiate rotation of the squirrel-cage rotor and the particular method employed to start the motor will designate the specific type.

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