TM5-6115-593-34
NAVFAC P-8-631-34
TO-35C2-3-463-2
Figure 11-12.
Installing Exciter Armature and
Rotating Rectifier Assembly
(e)
Replace cover (30) with screws (26 and 28),
washers (29), and nuts (27).
11-7. PERMANENT MAGNET ROTOR ASSEMBLY.
The permanent magnets and soft pale tips of the
revolving field are permanently attached to a steel hub by
nonmagnetic stainless steel bolts.
CAUTION
No attempt should be made to unbolt and
separate rotorparts. This will alter
permanent magnets, reducing their strength.
Do not expose rotor to excessive heat or
mechanical shock.
a.
Inspection. Inspect the rotor for metal chips
attracted to the magnets, accumulation of dust,
and check security of bolts holding each magnet
to hub.
b.
Testing. No testing of the PMG rotor is required.
c.
Replacement.
(1)
Removal.
(a)
Remove cover (30,
figure 11-3) by removing screws 26 and 28), washer (29),
and nut (27).
WARNING
USE EXTREME CARE WHEN REMOVING
ROTOR TO PREVENT INJURY TO HANDS
DUE TO MAGNETIC ATTRACTION
BETWEEN THE PMG ROTOR AND THE PMG
STATOR OR GENERATOR SHAFT.
(b)
Remove bolt (34), washer (35), and pin (36) from
PMG rotor (37). Carefully remove PMG rotor (37)
from generator shaft.
NOTE
If the PMG rotor is to remain disassembled
for an extended period, install a keeper on
the rotor. Use a band of iron or steel.
(2)
Replacement.
(a)
Remove iron band (if used) from PMG rotor
(37).Carefully attach PMG rotor (37) to
generator shaft with pin (36), bolt (34), and
washer (35).
(b)
Replace cover (30) with screws (26 and 28),
washers (29), and nuts (27).
d.
Repair. Since there are no bearings, brushes, or
slip rings and no semiconductor devices,
there is no repair of the PMG rotor.
NOTE
No attempt should be made to unbolt and
separate the parts of the rotor. Breaking the
magnetic circuit would alter the permanent
magnets, reducing their strength.
Reassembling the rotor would not restore
the magnetism to its prior state.
e.
Rebuild. Since there are no bearings, brushes, or
slip rings and no semiconductor devices, there is
no rebuild of the PMG rotor.
11-23
