TM 55-1730-229-12
TO 35C2-3-473-1
12-4-37
INVERTER
AC OUTPUT POWER CABLE
1.
3.
DC OUTPUT POWER CABLE
4.
TRU (Not Illustrated)
2.
Output Power Cables, 400 Hz AC-to-DC TRU, and DC-to-60 Hz Inverter
windings
and rectifier
unit (not
the other PM winding to the GCU. This
ac voltage is rectified and enables
shown) which provides the generator
the GCU exciter field control ampli-
Whenever the engine is
dc output.
fier. The amplifier varies the gen-
running, the PM stator windings pro-
erator exciter field as required to
vide three phase ac voltage.
The out-
keep the voltage of the generator at
put of one PM winding is rectified and
regulated by GCU circuits to provide
28 vdc. On the 83-360D, the only DC output
of the generator is from the two perma-
15 vdc operating and control voltage
nent magnet stator winding, which is
for the GCU loqic circuits.
When
engine speed reaches 95% rpm, relay 3K1
rectified to provide power to the GCU.
is activated and connects the ouput of
