TOPIC 2. ALTERNATOR

TM 10-3930-644-14 & P

TOPIC 2. ALTERNATOR

A. DESCRIPTION

The stator windings are assembled on the inside of a

laminated core that forms part of the alternator frame. A

The alternator, Figures 2-1 and 2-2, contains a solid

rectifier bridge connected to the stator windings contains

state regulator that is mounted inside the alternator slip

six diodes, and electrically changes the stator a.c.

ring end frame. All regulator components are enclosed

voltages to a d.c. voltage which appears at the alternator

into a solid mold, and this unit along with the brush

output (BAT) terminal. Alternator field current is supplied

holder assembly, is attached to the slip ring end frame.

through a diode trio which also is connected to the stator

The regulator voltage setting never needs adjusting; and

windings. A capacitor, or condenser, mounted in the

no provision for adjustment is provided.

end frame protects the rectifier bridge and diode trio

from high voltages, and suppresses radio noises.

The alternator rotor bearings contain a supply of

lubricant sufficiently adequate to eliminate the need for

No periodic adjustments or maintenance of any kind are

periodic lubrication. Two brushes carry current through

required on the entire alternator assembly.

the two slip rings to the field coil mounted on the rotor,

and under normal conditions will provide long periods of

attention-free service.

Figure 2.1. Alternator Assembly

R-146-1

3-81