A generator requires magnetic field and moving conductors to produce e.m.f. The magnetic field can be produced by using electromagnets (field coils). The electromagnets produce magnetic field when an electrical supply given to them. The type of a generator depends on how these field coils are energised.
In a Separately excited DC generator the field windings are energised by applying an
independent external DC source (such as a battery).
Circuit Diagram of Separately excited DC generator
The below figure shows the circuit diagram of a separately excited DC generator with its arrangement of field windings and armature conductors.
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| Circuit Diagram of Separately excited DC generator |
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