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Why alternators constructed with stationary Ac winding and rotating pole?
Wiki User
∙ 11y ago
To eliminate the requirement for slip rings and brushes to handle the large voltage/current involved.
Wiki User
∙ 11y ago
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Why do you use a capacitor in fans?
Due to the type of motor used in a fan. The capacitor provides a phase shift between the stationary winding and the rotating winding, which is necessary to get the desired torque.
Will a generator work if the wire is not spinning but the magnet is?
Yes. One winding/magnet must spin. Some generators have two windings, one is stationary (the stator), and the other spins (the rotor). One of these windings is energized, making it an electromagnet (called the field winding). In most generators of this type, the field winding is the one that is spinning. This is due to the fact that the stationary winding is the actual output of the generator, thus experiences high currents - and it is easier to pass these high currents through stationary busbars to the grid as opposed to rotating equipment.
Why use capictor in motor?
To create rotating magnetic field inside motor stator and it is done by capacitor. current drawn by motor running winding is lagging in nature when capacitor is connected in series with starting winding then the phase angle of running winding current and starting winding currents changes which creates a rotating magnetic field and motor is able to run.
What happens if field winding of a running dc shunt motor suddenly breaks open?
when the field winding of a running dc shunt motor suddenly breaks open the motor fails to run because in the motor the stationary winding is armature and rotatory is field winding
What wll happen if the starting winding in a split pase motor fail to energize?
The motor would not start rotating. The motor will just hum and the rotor will be stationary. If you can get the rotor to start turning the motor will still run on its run winding.I have a cement mixer that has a motor with a burnt out start winding. All I have to do is turn the barrel and the motor will start turning over. Without the start winding you have a choice of which way the motor will turn. If I turn the mixer barrel the opposite direction, the barrel will turn that way until I turn the unit off.
What do you understand about the stator of an AC motor?
AC motor has two main winding components - stator and a rotor. Stator winding is stationary where as rotor winding is on rotating part.
Why do you use a capacitor in fans?
Due to the type of motor used in a fan. The capacitor provides a phase shift between the stationary winding and the rotating winding, which is necessary to get the desired torque.
What are the parts of an alternator?
In an alternator, there are two main parts, one is stationary part and other is rotating part. Field winding may be placed on fixed part(stator) as in case of DC generator and on rotating part(rotor) as in case of AC genarators. Armature winding may be placed on rotating part(rotor) in case of DC generator and on stationary part (stator) in case of AC generator. In AC generators, for all practical purposes you have rotating filed system.
Why is current in field winding of rotating electrical machines always dc?
Because with DC stationary field w.r.t. rotor can be easily created,and permanent pole can be created.
Will a generator work if the wire is not spinning but the magnet is?
Yes. One winding/magnet must spin. Some generators have two windings, one is stationary (the stator), and the other spins (the rotor). One of these windings is energized, making it an electromagnet (called the field winding). In most generators of this type, the field winding is the one that is spinning. This is due to the fact that the stationary winding is the actual output of the generator, thus experiences high currents - and it is easier to pass these high currents through stationary busbars to the grid as opposed to rotating equipment.
Why is stationary armature preffered you commercial generators than moving armature?
The problem with a generator having a rotating armature is that the armature must be connected to its external load via slip rings and brushes. As power station alternators generate voltages up to 25 kV or so, and supply hundreds of amperes, the resulting arcing at the slip rings would be severe, and would require short maintenance cycles. Accordingly, it makes more sense for the armature to be stationary, and connected directly to its load, and have the field winding rotate instead, because the voltage/current applied to the field winding is quite low.
What is field winding?
The field winding on a generator is the winding that is electrified to create an electromagnet; it is generally the winding found on the rotor (the rotating part of the generator).
Why is induction motor called as rotating transformer?
it may be because rotating transformer also have one winding turns while the other remains stationary.because the one that was stationary is the one that accepts signals and the one that was turning is the one who converts he signal into current and distribute it to the motors engine
Why use capictor in motor?
To create rotating magnetic field inside motor stator and it is done by capacitor. current drawn by motor running winding is lagging in nature when capacitor is connected in series with starting winding then the phase angle of running winding current and starting winding currents changes which creates a rotating magnetic field and motor is able to run.
What happens if field winding of a running dc shunt motor suddenly breaks open?
when the field winding of a running dc shunt motor suddenly breaks open the motor fails to run because in the motor the stationary winding is armature and rotatory is field winding
What wll happen if the starting winding in a split pase motor fail to energize?
The motor would not start rotating. The motor will just hum and the rotor will be stationary. If you can get the rotor to start turning the motor will still run on its run winding.I have a cement mixer that has a motor with a burnt out start winding. All I have to do is turn the barrel and the motor will start turning over. Without the start winding you have a choice of which way the motor will turn. If I turn the mixer barrel the opposite direction, the barrel will turn that way until I turn the unit off.
What is the function of armature winding of a motor?
Armature is a rotating part of the machine, the coil which wound in the core of that rotating part.
