|Figure 1: Cutaway view of a totally enclosed fan-cooled shaded-pole induction motor|
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, humidifiers, slide projectors; small business machines such as photocopy machines; vending machines, advertising displays, etc.