Everything about Stator totally explained
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The
stator is the stationary part of an
electric generator or
electric motor. The non-stationary part on an electric motor is the
rotor.
Depending on the configuration of a spinning electromotive device the stator may act as the
field magnet, interacting with the
armature to create motion, or it may act as the
armature, receiving its influence from moving field coils on the rotor.
The first DC generators (known as
dynamos) and
DC motors put the field coils on the stator, and the power generation or motive reaction coils are on the rotor. This was necessary because a continuously moving power switch known as the
commutator is needed to keep the field correctly aligned across the spinning rotor. The commutator must become larger and more robust as the power amperage increases.
The stator of these devices may be either a permanent
magnet or an
electromagnet. Where the stator is an electromagnet, the coil which energizes it's known as the
field coil or
field winding.
AC
alternators are able to produce power across multiple high-amperage power generation coils connected in parallel, eliminating the need for the commutator. Placing the field coils on the rotor allows for an inexpensive
slip ring mechanism to transfer high-voltage, low amperage power to the rotating field coil.
It consists of a steel frame enclosing a hollow cylindrical core (made up of laminations of silicon steel ). The laminations are to reduce hysteresis and eddy current losses.
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