Synchronous Generator

Synchronous Generator ( Alternator)

  • An a.c generator, commonly referred to as synchronous generator or alternator, converts mechanical power into a.c. power.
  • The term alternator is used because it produces a.c. power. It is called synchronous generator because it must be driven at synchronous speed NS (= 120 f/p)  to produce a.c. power of the desired frequency f.
  • Thus for a 4-pole (i.e. P = 4) alternator to produce 50 Hz power, its speed of rotation must be 1500 mm (NS = 120 x 50/4 = 1500 r.p.m.).
  • The synchronous generator can be either single-phase or a polyphase generator.
  • Due to many technical and economic advantages, we always produce 3-phase power and hence the need for the 3-phase alternator (or 3-phase synchronous generator).

Synchronous Generator ( Alternator) Diagram

Synchronous Generator
Synchronous Generator
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