Dictionary of Electrical Engineering

Commonly used terms in the Electrical industry.

excitation system
the DC voltage source and its accompanying control and protection systems connected to the synchronous generator rotor.
rotating excitation system
an excitation system derived from rotating AC or DC machines. The output of the system is still DC and connected to the rotor.
static excitation system
an excitation system derived from solid state devices such as thyristors that convert the AC terminal voltage to DC before application to the rotor.