What Is A Shaded Pole Motor

May 30, 2024 Post a Comment

What is a shaded pole motor

Applications of the Shaded Pole Induction Motor Used in exhaust fans, hairdryers, and also table fans. Used in air conditioning and refrigeration equipment and cooling fans. Record players, tape recorders, projectors, photocopying machines. Used for starting electronic clocks and single-phase synchronous timing motors.

Why is it called a shaded pole motor?

Why Is It Called a Shaded Pole Induction Motor? The shaded pole induction motor is a self-starting single-phase induction motor with a copper ring shading one of the poles. The shaded ring is another name for the copper ring. This copper ring serves as the motor's secondary winding.

How do I identify a shaded pole motor?

How do I identify a shaded pole motor? This motor can be identified by using an auxiliary winding which is made up of a copper ring called a shading coil.

Why is a shaded pole motor an induction machine?

The working principle of a shaded pole induction motor is simple, the main winding carries alternating current and produces magnetic flux in the stator coil. The same magnetic flux is cut by the copper shaded band. Due to this, the EMF will be induced in the copper band.

What is the highest HP for a shaded pole motor?

They are built in power sizes up to about 1⁄4 horsepower (190 W) output. Above 1⁄3 horsepower (250 W), they are not common, and for larger motors, other designs offer better characteristics.

How efficient is a shaded pole motor?

The efficiency of shaded pole induction motor is very low almost in the range of 5 to 35%. The efficiency of shaded pole induction motor is low due to power loss in the shading coil.

Do shaded-pole motors need a capacitor?

Shaded pole motors are the original type of AC single-phase induction motor. Also called a single phase induction motor, simply connecting to a single voltage line and an external capacitor is required to make this motor turn.

What is the horsepower range of a shaded pole motor?

The output capability of a shaded pole motor will range from "sub-fractional HP" i.e. 1/30 HP to a maximum of 1/4 or 1/3 HP.

Can a motor be both AC and DC?

The universal motor is a type of electric motor that can operate on either AC or DC power and uses an electromagnet as its stator to create its magnetic field.

How do I know if I have a 2 pole or 4 pole motor?

Large motors and generators (typically rated over 7 MW) are available in both 4-pole and 2-pole designs. 4-pole synchronous motors and generators have solid rotors with salient poles while 4-pole induction motors and generators have squirrel cage rotors. In 2-pole motors and generators the rotors are cylindrical.

How do you tell if a motor is 2 pole or 4 pole?

What is the difference between 2-Pole Motor and 4-Pole Motor? 2 pole motor has two poles (or a single pair of magnetic poles) while 4 pole motors have four magnetic poles in alternating order. 2 pole motors have twice the speed of a 4 pole motor.

Can you change direction of shaded pole motor?

Shaded pole motors come in a variety of shapes and sizes and are convenient for powering displays, models and marble machines. Sometimes these motors are running in the opposite direction to what we would prefer. Most of them are constructed so we can reverse the rotation by reversing the field.

Can you reverse a shaded pole motor?

Although self-starting, the shaded-pole motor having copper-straps around the smaller poles, cannot be reversed.

What is the meaning of shaded pole?

Shaded-pole definition A magnetic pole in an electric motor or solenoid with a shading coil that encircles a portion of the pole face. The shading coil creates an out-of-phase current that allows a single phase alternating current electric motor to start or minimizes chatter in an alternating current solenoid or relay.

What is shaded pole motor speed?

Such geared motors are commonly available with the final output shaft or gear rotating from 600 RPM down to as low as 1/168 revolutions per hour (1 revolution per week!). A further development dispenses with the shading rings altogether.

What are the disadvantages of shaded pole motor?

The disadvantages of shaded pole induction motor:

Low power factor.
The starting torque is very poor.
The efficiency is very low as the copper losses are high due to the presence of the copper band.
The speed reversal is also difficult and expensive as it requires another set of the copper ring.

Why are shaded pole motors built only in small sizes?

Shaded-pole motors are best suited to the 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.

How many pole is a 1200 rpm motor?

It is beneficial to become aware of the different speed-related sounds motors make. Six-pole motors run at 1,200 rpm unloaded (7,200 Ã· 6) and between 1,050 and 1,175 rpm loaded.

What is the most efficient electrical motor?

Tests carried out on a 44 megawatt 6-pole synchronous ABB motor shortly before delivery showed an efficiency 0.25 percent greater than the 98.8 percent stipulated in the contract, resulting in the world record for electric motor efficiency.

Do more motor poles mean more torque?

When the number of poles and the number of slots increases, a large torque can be obtained and the torque pulsation also decreases. The pole represents the number of permanent magnet poles for the rotating rotor, and a motor with one pair of N pole/S poles is called a two-pole motor.