How many windings does a shaded pole motor have?

Unlike other types of single phase motors, shaded-pole motors have only one main winding and no start winding or switch.

Do shaded pole motors have start windings?

Unlike other types of single-phase motors, shaded-pole motors have only one main winding and no start winding or switch. As in other induction motors, the rotating part is a squirrel-cage rotor.

How many Poles does a shaded pole motor have?

It has two poles as shown in the basic construction. This motor is made up of stator and a rotor which is cage type. The stator has projected poles also called main poles in it. The supply winding on the main poles forms the main winding.

What is the shaded pole in a shaded pole motor?

Shaded Pole Motors

A Shaded Pole motor is an AC single phase induction motor. The auxiliary winding, which is composed of a copper ring, is called a shading coil. The current in this coil delay the phase of magnetic flux in that part of the pole in order to provide a rotating magnetic field.

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Can a shaded pole motor be reversed?

Shaded-pole motors of the asymmetrical type shown are only reversible by disassembly and flipping over the stator, though some similar looking motors have small, switch-shortable auxiliary windings of thin wire instead of thick copper bars and can reverse electrically.

What is the application of shaded pole motor?

Applications of the Shaded Pole Induction Motor

They are suitable for small devices like relays and fans because of its low cost and easy starting. Used in exhaust fans, hair dryers and also in table fans. Used in air conditioning and refrigeration equipment and cooling fans.

How does a shaded pole motor fail?

Shaded Pole motors have very low torque, so it doesn’t take much in the way of bad lube, grime, bearing friction etc. to stall them. On the plus side, they tend to last forever if you keep them clean and maintained.

What is the efficiency of a shaded pole motor?

The efficiency of shaded pole motors generally is only between 15 and 30%. And the power factor is rather low as well. A low power factor and efficiency is probably ok for applications where there is only one small fan (shaded pole motors are generally 40 W or less).

What is the highest HP for a shaded pole motor?

For extremely small capacities up to 1/40 hp (18.7W), the shaded-pole type of motor is most frequently used. It provides sufficient torque for fans, blowers, and other similar equipment, and the starting current is not objectionable on lighting lines.

What is the smallest shaded pole motor size in HP?

Shaded-pole motors are best suited to low-power household application, because the motors have low starting torque and efficiency ratings. Because of the weak starting torque, shaded-pole motors are built only in small sizes ranging from 1/20 to 1/6 hp.

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What is the shaded pole starting method?

Explanation: The shaded pole starting method is that the part of the pole is shaded by short circuited copper ring. The displacement between shaded and unshaded portion varies between 200-300.

How do you change the rotation of a shaded pole motor?

SOLUTION. The direction of rotation in a conventional shaded pole motor can be changed by changing the position of the shaded pole with respect to the main pole. This can be done by reversing the stator poles by 180°.