SLIP RING END
FRAME
DRIVE
END
FRAME
ROTOR
ASSEMBLY
STATOR
ASSEMBLY
ASf06022
Figure 6-22.--A disassembled alternator.
windings for the three phases are wound through and
negative) are mounted internally--three negative on the
around it. The rotor assembly (fig. 6-25) is composed of
slip ring end frame and three positive on the heat sink
the slip rings, the field windings, the rotor shaft, and
mounted on the slip ring and frame.
two rotor segments. The drive end frame mounts the
AC Generator Subassemblies
front rotor shaft bearing and provides lugs for mounting
the alternator to an engine.
The ac generator (alternator), shown in figures 6-22
and 6-23, consists of four main subassemblies or
Disassembling an AC Generator
components--the slip ring end frame assembly, the
The first step in disassembling an ac generator is to
stator assembly, the rotor assembly, and the drive end
scribe a line across the area where the drive end frame,
frame. The slip ring end frame assembly (fig. 6-24)
stator assembly, and slip ring end frame join. This will
holds the rear rotor shaft bearing, the diode rectifiers
aid you in replacing these components in their original
and heat sink, the brushes and brush holder, and a
position during reassembly.
capacitor to limit voltage surges across the diodes. The
stator assembly has a laminated iron frame, and the
DRIVE
SLIP-RING
END FRAME
END
END FRAME
ADJUSTING
FRAME
LUG
BEARING
THRU BOLT
BRUSH &
TERMINAL
ASSEMBLY
B AT.
GRD.
SLIP-
RINGS
BEARING
PULLEY
CAPACITOR
HEAT SINK
FAN
MOUNTING
HEAT
LUG
ROTOR
SINK
STATOR
ASSEMBLY
ASf06023
Figure 6-23.--An alternator.
6-20
