DEFINITIONS - CONT - TM-55-1905-223-24-40311

TM 55-1905-223-24-4

GLOSSARY - CONT

DEFINITIONS - CONT

EXCITER CURRENT

The direct current supplied to the exciter field coils which is controlled by

the voltage regulator.

EXCITER ROTOR

The rotating member of the exciter into which a three-phase alternating

voltage is induced. The resulting ac is then rectified into direct current

and applied to the rotating generator field windings.

EXCITER STATOR

The stationary member of the exciter which serves as the exciter field

producing the magnetic field from the direct current supplied by the

automatic voltage regulator.

FIELD

That part of the generator and exciter which, when supplied with direct

current, will produce a magnetic field. The exciter stator serves as the

exciter field while the main generator rotor serves as the generator field.

FREQUENCY

The number of complete cycles of alternating current per unit of time.

Typically, frequency is expressed in cycles per second or Hertz (Hz).

GENERATOR ROTOR

The rotating member of the generator.

GENERATOR STATOR

The stationary member of the main generator which supplies the three-

phase output power to the load.

GOVERNOR

A device which controls engine speed and thus the generator output

frequency.

GROUND

A connection, either accidental or intentional, between an electrical

potential and the earth or some conducting body serving in place of the

earth.

HEAT SINK

A device which absorbs heat from electrical devices such as diodes and

SCRs and dissipates the heat to the surrounding air.

HERTZ

A term equivalent to cycles per second (See Frequency).

HUNTING

Oscillation in frequency or in voltage where steady-state conditions are

not reached, particularly after a load transient change.

Glossary 4