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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.
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∙ 8y ago
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∙ 14y agoA shaded pole motor is an induction motor with one power winding and no start capacitor. One of the poles on the laminations has a single-turn, short-circuited (heavy wire) winding, hence the term "shaded". This one-turn winding is a transformer. Since it is shorted, it creates high current and a phase change on that pole, causing the motor to be able to start and run.
Small motors, such as used on small vent fans, are often shaded pole motors.
Wiki User
∙ 10y agoCoils energized by alternaiting current.
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How much current is required for 1phase 230volt pumping motor?
There are 3 most commonly used methods of starting single-phase AC induction motors: Shaded Pole: This method is commonly used on small AC induction motors, like might be found in an ice cream freezer or electric fan. It involves a physical object acting as a small coil which causes a separate starting magnetic field out of phase with the main field generated by the primary induction coil. This causes a torque to develop across the rotor shaft upon application of AC current which starts the motor turning. Once turning, the rotor rotates concurrent to the main coil's field and no longer needs the starting force, which actually lowers motor efficiency and slows rotation when the rotor gets up to speed. For this reason, the starting force is kept low to avoid excessive motor heating through loss of efficiency. Capacitor Start: This method is commonly used on larger AC induction motors, like might be found in an air-conditioner blower motor or compressor. In a Capacitor Start motor, a second coil offset somewhat from the main coil, is connected in series with a capacitor to cause a phase shift. This provides a starting torque for the rotor stronger than the shaded-pole motor and also more efficiently, but still interferes with overall motor efficiency and causes extra heating once the rotor is up to speed. "Split-phase" or Switch Phase: This method is commonly used on motors that require a great deal of starting torque, like many washing machines and some dryers. So-called "Split-phase" motors use a more powerful offset coil and capacitor combination that is turned on and off by a centrifugal switch controlled by the rotor speed. When the motor is stopped or turning slowly, the centrifugal switch engages the start winding and provides maximum torque for starting the motor. When the rotor speed increases, the start winding is disengaged by the centrifugal switch, and this leaves the motor spinning on the main coil only. This increases motor efficiency by leaving the start winding off during the motor run time and reduces motor heating.
If you crank the shaft of a dc motor manually will the motor become a dc generator?
It depends on both the wiring of the motor and what if any residual magnetic field remains in the field windings. If there is some residual field, you will get some volts, but not many. If the motor has permanent magnets, it is effectively a dynamo.
How do you reverse polarity on ac motor?
Reversing polarity is not possible with an ac motor. Some do have wiring that will allow you to change rotation. The type and model of the motor can tell you if it is reversible.
Do you have to take a three phase motor to a disposal site?
A 3-phase motor probably has some scrap value to a scrap-metal dealer.
What happens if load of DC series motor is disconnected?
In D.C Shunt motor, the field winding is connected parallel with the armature winding.. If you remove the supply to armature winding, the motor will stop after some time.
Why won't my shaded pole motor run?
A shaded pole AC motor has a part of it's stator short circuited by a copper ring. When the flux in the main part of the stator increases, the flux through the copper ring with have a small delay, since it wants to keep its flux constant. Therefor you get a small rotational component to the field distribution, which makes the rotor turn.
How single-phase induction motor classified?
The single phase induction motors are made self starting by providing an additional flux by some additional means. Now depending upon these additional means the single phase induction motors are classified as: 1.Split phase induction motor. 2.Capacitor start inductor motor. 3.Capacitor start capacitor run induction motor. 4. Shaded pole induction motor.
Can a purebred American Bobtail have a shaded silver and white coat?
There are some purebred American Bobtail that have a shaded silver and white coat.
Why do some trees grow side ways and then go up?
because they are being shaded by another tree or some other object that blocks the sun for them. they grow toward the sunlight and then straighten up when they are nolonger being shaded.
What is an element that has some characteristics of metal and some characteristics of a nonmetal?
Elements that have some characteristics of a metal and some characteristics of a nonmetal are called semimetals or metalloids.
What is an element that has some characteristics of a metal and some characteristics of an nonmetal?
Elements that have some characteristics of a metal and some characteristics of a nonmetal are called semimetals or metalloids.
What is an element that characteristics of a metal and some characteristics of a nonmetal?
Elements that have some characteristics of a metal and some characteristics of a nonmetal are called semimetals or metalloids.
Why ac motor does not rotate when dc supply is given to it?
An AC motor relies on an alternating waveform supplied to it. As the rotor is moved by the magnetic field produced by the current, it aligns itself ready for an opposite polarity in order to continue in the same direction. There are several different designs of AC motor. Some have a commutator and others don't. Small AC motors are known as shaded pole or 'squirrel cage' types used in small fans and record players etc. These just have a single coil on the stator. The rotor has a field induced in it which causes it to move and follow a rotating pattern of Field. If you put DC into a single coil it will probably just overheat and there will be no rotating field for the rotor to follow.
What are some names for tree shaded walkways in landscapes?
1: Alamedas 2: Allees Of Trees
What are some characteristics for volume?
name some characteristics for volume
What is an element that has some characterists of a metal and some characteristics of a nonmetal?
Elements that have some characteristics of a metal and some characteristics of a nonmetal are called semimetals or metalloids.
What are some characteristics about Dred Scott?
What are some characteristics of Dred Scott
