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 TM 55-1905-220-14-1
1-48. GENERATOR.
a. The Generator (Figure 1-46) is an alternating current (AC) brushless 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: an 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 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.
1-81
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