What is the rotating part of a DC generator called?

The rotating part of a DC generator is called the armature. In the context of a DC generator, the armature is the component that turns within the magnetic field created by the field windings. As the armature rotates, it cuts through the magnetic lines of flux, which induces an electromotive force (EMF) according to Faraday's law of electromagnetic induction. This results in the generation of direct current (DC) electricity.

The armature typically consists of coils of wire or windings that are mounted on a rotor. It is crucial for the generation of electricity because it is where the conversion of mechanical energy into electrical energy occurs. Understanding the function of the armature is fundamental for both the operation and design of DC generators, as it directly affects the efficiency and output of the electrical system.

In comparison, the stator is the stationary part of the machine that provides the magnetic field, the rotor typically refers to the complete rotating assembly (which may include both rotor and armature), and the field winding is specifically the coils that create the magnetic field. Each of these components plays a role in the overall function of the generator, but the armature is specifically what rotates and generates the electrical output.