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when alternating current flows in the field winding, an alternating flux is produced in the field core.A portion of this flux links with the shading coil,which behaves as a short circuit secondary of a transformer.A voltage is induced in the shading coil, and this voltage circulates a current in it.The induced current produces a flux called the induced flux which opposes the main core flux.The shading coil thus causes a flux in the shaded portion to lag behind the flux in unshaded portion of the pole.At the same time the main flux and shaded pole flux displaced in space.This space displacement is less than 90 degree.Since there is time and space displacement between two fluxes,the conditions for setting up a rotating magnetic field is produced.Under the action of the rotating flux a starting torque is developed on the cage rotor.The direction of this flux is from unshaded to shaded portion of the pole.and the rotor moves in clockwise direction
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What will happen if you place too many washers on the end of a shaded-pole motor shaft?
The rotor will jam.
How can a shaded-pole motor be reversed?
Yes, the rotation of a shaded pole motor can be reversed. It is advisable to only attempt this on a small motor and if you have general mechanical and electrical knowledge. The simple and direct explanation is one has to flip the stator. To do this the motor must be disassembled to a point at which the rotor can be removed. Once removed, turn it end over end and reinstall. Done. Note that the bearing housing ends will likely have to be switched as well.
What are the advantages and disadvantages of using a shaded pole motor?
Advantages, Disadvantages and ApplicationsThe various advantages of Shaded pole motors includes Very cheap and reliableEasy to constructExtremely rugged in natureDisadvantages includesLow efficiencyLow starting torqueSince the shading coil is made of copper, the copper loss is high.See the related link for further information.
What is an Induction Relay with shaded pole?
It is a device used to protect Electric Network and loads
What is differene between 2 pole 4 pole electric motor?
A 2-Pole motor runs twice as fast as a 4-pole motor. The 2-pole motor has 2 windings at 180 degrees apart and the four pole motor has four windings at 90 degrees apart. The rotor tries to move from pole to pole with each half cycle of the AC current so the motor no-load speed for 60 cycle current is 2x3600/#poles. This is 1800 rpm for a 4-cycle motor and 3600 rpm for a 2-pole motor.
How many poles can a shaded pole motor have?
2
What kind of motor uses a differential reluctance pole to produce starting torque?
shaded pole
What are the types of motor using in table fan?
The motor used in a table fan is usually a shaded pole motor.
A shaded pole motor coil will have a resistance of approximately?
15 to 40 ohms.
Why does a shaded-pole motor run at a constant seed?
The frequency of the applied voltage is consant.
Why does a shaded pole motor run at constant speed?
The frequency of the applied voltage is constant.
What will happen if you place too many washers on the end of a shaded-pole motor shaft?
The rotor will jam.
What are the applications of a shaded pole motor?
When the coil in the relay needs to run off an AC signal rather than DC. The shaded pole keeps the relay from "chattering" every time the AC current crosses 0v on the sine wave.
What if a shaded -pole motor is chattering or buzzing while it is turning the problem is most likely caused by?
A faulty or worn bearing.
What are some characteristics for a shaded pole motor?
The rotor is made up of laminated steel discs that are pressed on to a common shaft. This shaft has bearings mounted on either end which allows the rotor to spin within the frame of the motor. The shorting bars on the rotor are usually made of aluminium.
What motor does a food mixer use?
Most likely the motor will be a shaded pole induction motor. If the food mixer has a place for brushed on the side of the motor and are oppositely opposed to each other, then it would be a universal motor.
How can a shaded-pole motor be reversed?
Yes, the rotation of a shaded pole motor can be reversed. It is advisable to only attempt this on a small motor and if you have general mechanical and electrical knowledge. The simple and direct explanation is one has to flip the stator. To do this the motor must be disassembled to a point at which the rotor can be removed. Once removed, turn it end over end and reinstall. Done. Note that the bearing housing ends will likely have to be switched as well.
