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Generac Power Systems Guardian 5410 Repair Manual: Major Generator Components; Rotor Assembly; Stator Assembly

Diagnostic repair manual.
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Section 2

MAJOR GENERATOR COMPONENTS

1
3
4
5
8

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 driven by the engine at a constant
speed through a pulley and belt arrangement.
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 recom-
mended). DO NOT USE ANY MATERIAL CONTAINING
METALLIC GRIT TO CLEAN SLIP RINGS.
Page 8
8
2
Figure 2-1. Exploded View of Generator
The Stator is "sandwiched" between the upper and
lower bearing carriers and retained in that position by
four Stator studs. A total of eight (8) leads are brought
out of the Stator as follows:
1. Four (4) Stator power winding output leads (Wires
2. Stator power winding "sensing" leads (11S and
3. Two excitation winding output leads (No. 2 and 6).
1. BRUSH HOLDER
2. UPPER BEARING CARRIER
3. STATOR
4. ROTOR
5. LOWER BEARING CARRIER
6. ENGINE
7. PULLEYS AND BELT
8. FANS
6
7

STATOR ASSEMBLY

No. 11, 22, 33 and 44). These leads deliver power
to connected electrical loads.
22S). These leads deliver an "actual voltage sig-
nal to the electronic Voltage Regulator.
These leads deliver unregulated excitation current
to the voltage regulator.

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