Guardian Technologies 4270 manual Rotor Assembly, LIC Grit or Abrasive to Clean Slip Rings

Section 2

MAJOR GENERATOR COMPONENTS

BRUSH HOLDER	ENGINE
	FLYWHEEL/PULLEY
STATOR
BEARING	ROTOR
	BEARING
BEARING
CARRIER
	TENSIONER
BEARING CARRIER
	PULLEY
	BELT

Figure 2-1. Exploded View of Generator

ROTOR ASSEMBLY STATOR 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.

The QUIETPACT 75D utilizes a 2-pole Rotor. 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 should be cleaned. If dull or tarnished, clean them with fine sandpaper (a 400 grit wet sand- paper is recommended). DO NOT USE ANY METAL-

LIC GRIT OR ABRASIVE TO CLEAN SLIP RINGS.

The Stator is assembled between the front and rear bearing carriers and retained in that position by four Stator studs. Windings included in the Stator assem- bly 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. 11, 22, 33 and 44). These leads deliver power to connected electrical loads.

2.Stator Power winding “sensing” leads (11 and 22). These leads deliver an “actual voltage signal to the electronic Voltage Regulator.

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