Do you really know about shaded pole motors?

A shaded pole motor is a simple self-starting AC single-phase induction motor, which is a small squirrel-cage motor. The rotor position is welded with a copper ring. The copper ring is also called the shaded pole ring, and the copper ring is used as the secondary winding of the motor. The salient features of shaded pole motors are very simple structure, no centrifugal switch, the shaft power loss of shaded pole motors is large, the power factor of the motor is low, and the starting torque is also large, they are designed to keep small size and low rated power.

The speed of the motor is as accurate as the frequency of the power applied to the motor. A shaded pole motor can only rotate in a certain direction, the motor cannot rotate in the opposite direction. The loss caused by the shaded pole coil is large, the efficiency of the motor is low, and the structure is simple. These motors are widely used in household fans and other small-capacity appliances.

Shaded pole motors can be divided into salient pole shaded pole motors according to the shape and structure of the stator. The stator core of the shaded pole motor is a square, rectangular or circular magnetic field frame, and the magnetic poles are prominent. Each magnetic pole has one or more auxiliary short-circuit copper rings, that is, the shaded pole winding does not need short-circuit copper rings. Instead, thick enameled wires are used to form distributed windings (self-short-circuited after being connected in series) and embedded in the stator slots (about 1/3 of the total number of point slots), until the role of the auxiliary group.

The main and shield windings are spaced apart at an angle. When the main winding of the shaded pole motor is energized, the shaded pole winding will also generate an induced current, causing the magnetic flux of the covered and uncoated parts of the stator pole to rotate in the direction of the covered part. The battle is simple to renew and requires no additional windings and capacitors. The disadvantage is low efficiency and large slip.

Shaded pole motors, oven motors, range hood motors, dryer motors, air fryer motors, disinfection cabinet motors, built-in oven motors