Generating Mode and Motoring Mode of Synchronous Machine:

Generating Mode and Motoring Mode of Synchronous Machine is derived by a realistic synchronous machine will have resistance ra and leakage reactance xl per armature phase which can be assumed to be lumped in series between the terminal voltage Vt and the air-gap emf Er for each machine phase.

Generating Mode and Motoring Mode of Synchronous Machine

The circuit diagram of the machine on a per phase basis is drawn in Fig. 8.8(a) for the generating mode (armature current in same direction as Er).

From Fig. 8.8(a) shows the Generating Mode of Synchronous Machine

Generating Mode and Motoring Mode of Synchronous Machine

and from Fig. 8.8(b) shows the Motoring Mode of Synchronous Machine

Generating Mode and Motoring Mode of Synchronous Machine

The resistance of a synchronous machine armature is usually very small and can generally be neglected in performance analysis

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