Diesel Generator Tech

Alternators need DC excitation at the rotor to create rotating magnetic field. DC power  → electromagnets  → Rotation → Rotating Magnetic field. Working exciter is known as the primary source of DC power for rotor excitation. There are 3 ways to excite the rotor of an Alternator 1. By using DC Generator 2. Static  Excitation 3. Brushless Excitation The main purpose of exciter in a generator(alternator) is to provide stationary rotating magnetic field.Which is used to induce the e.m.f in the armature coil. So, DC power is given to exciter and the exciter is nothing but a coil, and the exciter creates a magnetic field. If a mechanical supply is given to the exciter then there will be a rotating magnetic field which cuts the stationary armature coils and induces emf in the stationary armature coil. Exciter is a small generator, mounted on the same shaft as that of the main generator, which produces DC power for the main generator fi...