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 TM 55-1905-219-14-1
GENERATOR.
a. The Generator (Figure 1-44) is an alternating current (AC) brush- less type.
The Generator produces
450/VAC, -3 phase, 60 hertz, 40 kilowatts at 1800 revolutions per minute (RPM).
b. The Generator consists of two major components: the Alternator and a direct-connected exciter.
c. The Alternator is made up of a rotating coil assembly, or rotor, and a fixed stator-coil assembly, or stator. The
rotor consists of four coil and pole piece assemblies bolted to a shaft. These coils are connected in series with leads
brought out to the rotating rectifier assembly. The stator consists of coil groups placed in slots in a laminated steel cove.
The stator and coils are mounted in the frame. The rotating rotor is energized by an exciter armature. The output of the
exciter armature is converted to direct current (DC) by the rotating rectifier assembly.
d. The Rotating Rectifier Assembly and the Exciter Armature are mounted on the shaft. The exciter armature
rotates inside the exciter field assembly. The exciter field assembly consists of twelve coils connected in series and is
attached to the frame. The exciter armature is of the twelve pole type. It is connected in a three-phase, three wire, wye
coil group. These groups are mounted on the shaft. The output of the armature is rectified by the rotating rectifier
assembly.
e. The Rotating Rectifier Assembly is a bridge rectifier with surge protection and control components.
1-77
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