Example 5.1 (4ed) || Example 4.1(5ed) (English) (Chapman) ||
This video discusses the basics of Synchronous Generators. Solved example 5.1 is also discussed.

Synchronous generators or alternators are synchronous machines used to convert mechanical power to ac electric power.
In a synchronous generator, a dc current is applied to the rotor winding, which produces a rotor magnetic field.
When turned by a prime mover, a rotating magnetic field .
This rotating magnetic field induces voltages within the stator windings of the generator.

Speed of rotation of a Synchronous Generator.

Internal generated voltage of a synchronous generator.

Equivalent circuit of a sysnchronous generator.
Example 5.1 : A 200-kVA, 480-V, 50- Hz, Y-connected synchronous generator
with a rated field current of 5 A was tested, and the following data were taken:
1. VT,OC at the rated h was measured to be 540 V.
2. h,se at the rated If was found to be 300 A.
3. When a dc voltage of 10 V was applied to two of the terminals, a current of 25 A
was measured
Find the values of the armature resistance and the approximate synchronous reactance in
ohms that would be used in the generator model at the rated conditions.

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