A static exciter is designed to supply a synchronous motor with the required excitation power and, by controlling the excitation current, regulating the reactive power consumption of the motor.

The exciter consists of the following main components:

• Exciter transformer
• Exciter converter
• Common and closed-loop control equipment
• Overvoltage protective equipment and rotor starting and protective resistors

The components are preassembled in cubicle-type enclosures. The number of enclosures depends on the power rating and the desired design (e.g. redundant rectifiers).