What is a shaded pole motor?

What is a shaded pole motor?

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. When power is applied to the stator, the flux in the main part of the pole induces a voltage in the shading coil, which acts as a transformer secondary winding.

How does a shaded pole motor work?

The working principle of shaded pole induction motor is simple, the main winding carries alternating current and produces magnetic flux in the stator coil. By lenses Law, the flux in the shade band opposes the main stator flux. It causes a slight magnetic imbalance and generates a rotating magnetic field.

Who invented the shaded pole motor?

Barber-Colman
A reversible shaded-pole motor was made by Barber-Colman several decades ago. It had a single field coil, and two principal poles, each split halfway to create two pairs of poles.

Where is shaded pole motor used?

The various applications of the shaded poles motor are as follows: They are suitable for small devices like relays and fans because of their low cost and easy starting. Used in exhaust fans, hairdryers, and also table fans. Used in air conditioning and refrigeration equipment and cooling fans.

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 a pole in induction motor?

Simply defined, a pole is a north or south magnetic field of force that is generated by a permanent magnet or current passing through a coil of wire. Permanent-magnet stepper motors are the simplest. Manufacturers define their pole count by the number of pole pairs or stator windings.

What is the smallest shaded pole motor size in HP?

1/20 to 1/6 hp
Because of the weak starting torque, shaded-pole motors are built only in small sizes ranging from 1/20 to 1/6 hp. Applications for this type of motor include fans, can openers, blowers, and electric razors.

Is shaded pole motor self-starting?

Shaded pole motor is a self-starting motor because it is a small squirrel-cage motor in which the auxiliary winding is composed of a copper ring or bar surrounding a portion of each pole.

How is motor pole calculated?

Poles = number of poles of your motor. So, for example, if you have a 4 pole motor on 60 Hz then RPM=60*(2/4)*60=1800 rpm.

What is the size of shaded pole motor?

This copper ring acts as a secondary winding for the motor. The shaded pole motor rotates only in one particular direction, and the reverse movement of the motor is not possible….Package Includes:

What is salient pole of a generator?

Saliency simply means projection outward . Therefore from the literal meaning of Saliency one can guess that Salient Pole machines must have poles projecting outward. In general, the Cylindrical Rotor type machines are confined to 2 and 4 pole turbine generators, while salient pole types are built with 4 poles upwards and include most classes of duty.

What are the advantages of salient pole?

Cheap

What is salient pole construction details?

The salient pole type construction of rotor is shown below is used in low and medium speed ( 125 to 500 rpm ) electrical machines. The poles are made of steel laminations rivetted together and are fixed to the rotor by a dovetail joint. In synchronous machines, the damper winding is provided on the slots, provided on the pole faces ( also known

What does pole, salient mean?

Pole, Salient. In dynamo and motor field magnets, salient poles are those projecting from the base or main body of the field magnet , as distinguished from consequent poles formed by coils wound on the main body itself.