9.3.3.2/1
Describe the main components of a generator
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(a) Construct a table to describe the main components
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Component of generator Description
Rotor
The rotor consists of a single loop of wire made to rotate within a magnetic field. It usually consists of several coils of wire wound on an armature. Armature
The armature is a cylinder of laminated iron mounted on an axle. The axle is carried in bearings mounted on to the external structure of the generator. The rotor then spins by applying torque to the axle.
Coil
Each coil usually consists of many turns of copper wire wound on the armature. The two ends of each coil are connected either to two slip rings (AC) or two opposite bars of a split-ring commutator (DC).
Stator
The stator is the fixed part of the generator that supplies the magnetic field in which the coils rotate. It may consist of two permanent magnets with opposite poles facing and shaped to fit around the rotor.
Alternatively, the magnetic field may be provided by two electromagnets. Field electromagnets Each electromagnet consists of a coil of many turns of copper wire wound on a soft iron core. The electromagnets are wound, mounted and shaped in such a way that opposite poles face each other and wrap around the rotor.
Brushes
The brushes are carbon blocks that maintain contact with the ends of
the
