Generac Power Systems GP Series Diagnostic Repair Manual page 8

Section 1 Description and Components
Stator Assembly
The stator can houses the dual AC power windings and an excitation winding. See
stator leads extend from the stator can.
11 22
To control panel
12-pin connector
AVR
The stator can is positioned between an engine adapter
and a rear bearing carrier. It is retained in position by four
stator bolts.
Brush Holder and Brushes
The brush holder is retained to the rear bearing carrier
with two self-tapping screws. A positive (+) and a
negative (-) brush are retained in the brush holder, with
the positive (+) brush riding on the slip ring nearest the
rotor bearing.
See Figure 1-4. Wire 4 connects to the positive (+) brush
and wire 0 to the negative (-) brush. Wire 0 connects to
frame ground. Rectified and regulated excitation current,
as well as current from a field boost circuit, are delivered
to the rotor windings via wire 4, and the positive (+) brush
and slip ring. The excitation and field boost current
2
To control panel
terminal blocks
11 22 44
4 0 6 162
Figure 1-2. Alternator Wiring
CONN3R CONN3P
CB6
DB2
Figure 1-3. Alternator Schematic
TB
CT CT
passes through the windings and to frame ground via the
negative (-) slip ring and brush, and wire 0. This current
flow creates a magnetic field around the rotor having a
flux concentration that is proportional to the amount of
current flow.
Figure 1-4. Brush Holder and Brushes
Figure 1-2. A total of nine (9)
BA
4
0
Diagnostic Repair Manual
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