The shaded pole motor is a simple self-starting AC single-phase induction motor. It is a small squirrel cage motor. One of the auxiliary windings is surrounded by a copper ring. The copper ring is also called a shaded pole ring or a shaded pole ring. The copper ring is used as the secondary winding of the motor. The salient feature of the shaded pole motor is that the structure is very simple, there is no centrifugal switch, the power loss of the shaded pole motor is very large, the power factor of the motor is low, and the starting torque is also very low. They are designed to maintain a small size and have a low power rating. The speed of the motor is as accurate as the frequency of the power supply applied to the motor, and these motors are often used to drive clocks. The shaded pole motor only rotates in a specific direction, and the motor cannot rotate in the reverse direction. The loss generated by the shaded pole coil, the motor efficiency is low, and its structure is simple. These motors are widely used in household fans and other small-capacity electrical appliances.