Shaded-Pole Induction Motor

 
By 23 July 2017
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This is another method to create two phases, with phase differences using pole shading.

The shaded pole has salient poles, each pole split into two sections. A small part of each pole face is wound with a short-circuited copper ring.

When supply is given, the flux under the shaded portion lags behind that of the unshaded portion. Thus a phase difference is created. This causes the creation of a rotating magnetic field.

The shaded pole motor is inexpensive, since it does not consist of an auxiliary winding or other mechanisms. These are low-torque motors, generally used for small fans and blowers.