Exam Question
(a) What is the meaning of excitation in an alternator? (6)
(b) Explain a brushless alternator with an insight on how the excitation is achieved in these alternator. (10)
Class 4 (4th Engineer)
MET
📅 Aug 2025
Reference Answer
### (a) Meaning of Excitation in an Alternator (6 Marks)
**1. Definition:**
Excitation is the fundamental process of establishing a magnetic field within an electrical machine. In the context of a synchronous alternator, it refers specifically to the supply of Direct Current (DC) to the field windings located on the rotor.
**2. Principle of Operation:**
**1. Definition:**
Excitation is the fundamental process of establishing a magnetic field within an electrical machine. In the context of a synchronous alternator, it refers specifically to the supply of Direct Current (DC) to the field windings located on the rotor.
**2. Principle of Operation:**
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