6 Synchronous Generators

In Chapter 3, basic principles of synchronous generators and motors have already been introduced. In synchronous machine, the stator is used as the armature and the rotor is used as the field. The field is always excited by DC voltage. The difference between the synchronous generator (or alternator) and the synchronous motor is that the synchronous generator exports electrical power to the bus bar whereas the synchronous motor imports power from the bus bar. The aim of this chapter is to introduce the synchronous generator or alternator.


An alternator has the following three important parameters:

(i) armature resistance (Ra),

(ii) armature leakage reactance (XL) and

(iii) reactance ( ...

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