Thursday, April 10, 2014

Shaded Pole Induction Motor

Shaded-Pole Induction Motor
 Cutaway view of a totally enclosed fan-cooled shaded-pole induction motor
Figure 1: Cutaway view of a totally enclosed fan-cooled shaded-pole induction motor
A shaded-pole motor maybe defined as a single-phase induction motor provided with an auxiliary short-circuited winding or windings displaced in magnetic position from the main winding.

Shaded-pole induction motors are used in a wide variety of applications requiring an induction motor of 1/2 horsepower or less, even down to less than 1 mhp. It is simple in construction, low in cost, and extremely rugged and reliable - like a polyphase induction motor. Its torque characteristics and applications are similar to those of a permanent-split capacitor motor, except that it has a lower efficiency and a lower power factor. It is used in extremely wide variety of applications: home appliances, such as rotisseries, fans of all kinds such as those most commonly found in homes such as home electric fans, humidifiers, slide projectors; small business machines such as photocopy machines; vending machines, advertising displays, etc.

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