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ROTOR ASSEMBLY
The Rotor is sometimes called the "revolving field",
since it provides the magnetic field that induces a
voltage into the stationary Stator windings. Slip rings
on the Rotor shaft allow excitation current from the
voltage regulator to be delivered to the Rotor wind-
ings. The Rotor is directly coupled to the engine
crankshaft.
All generator models in this manual utilize a 2-pole
Rotor, i.e., one having a single north and a single
south pole. This type of Rotor must be driven at 3600
rpm for a 60 Hertz AC output, or at 3000 rpm for a 50
Hertz output.
Slip rings may be cleaned. If dull or tarnished, clean
them with fine sandpaper (a 400 grit wet sandpaper is
recommended). DO NOT USE ANY METALLIC GRIT
OR ABRASIVE TO CLEAN SLIP RINGS.
STATOR ASSEMBLY
The Stator is "sandwiched" between the engine
adapter and rear bearing carrier and retained in that
position by four Stator studs. Windings Included in the
Stator assembly are (a) dual AC power windings, (b)
an excitation or DPE winding, and (c) a battery
charge winding. A total of eleven (11) leads are
brought out of the Stator as follows:
1. Four (4) Stator power winding output leads (Wires No. 11P,
22P, 33 and 44). These leads deliver power to connected elec-
trical loads.
2. Stator Power winding "sensing" leads (11S and 22S). These
leads deliver an "actual voltage signal to the electronic Voltage
Regulator.
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4
3
Figure 2-1. Exploded View of Generator
MAJOR GENERATOR COMPONENTS
6
1. BRUSH HOLDER
2. REAR BEARING CARRIER
3. BEARING
4. ROTOR
5. STATOR
6. ENGINE ADAPTOR
3. Two excitation winding output leads (No. 2 and 6). These leads
deliver unregulated excitation current to the voltage regulator.
4. Three (3) battery charge output leads (No. 55, 66 and 77).
Leads 2 & 6 =Stator Excitation Winding
Leads 11S & 22S = Voltage Sensing Leads
Leads 11P & 22P, 33 & 44 = AC Power Windings
Leads 55, 66, 77 = Battery Charge Windings
Figure 2-2. – Stator Output Leads
BRUSH HOLDER
The brush holder is retained in the rear bearing carri-
er by two M5 screws. It retains two brushes, which
contact the Rotor slip rings and allow current flow
from stationary parts to the revolving Rotor. The posi-
tive (+) brush is located nearest the Rotor bearing.
Section 2
2
6
11P
11S
22P
22S
44
55
66
77
Page 7
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