GP Repair
Theory of Operation
wc_tx000547gb.fm
69
5.3
Voltage Regulation
See Graphic: wc_gr003117
The Automatic Voltage Regulator (AVR)
(c)
is an encapsulated,
electronic control device that is rectangular in shape and located inside
the end cover of the generator. Its function is to maintain constant
generator voltage over varying load conditions. The AVR controls
generator voltage by sensing AC voltage from the main stator winding
via two sensing wires
(e)
. Voltage induced through the excitation
winding of the stator is rectified to DC by the voltage regulator. The
resulting DC voltage is sent to the field terminals (brushes)
(f)
. The DC
output controls the field strength of the excitation winding. Thus, as
more load is sensed, the more DC voltage is sent to the excitation
winding in the rotor via the brushes and slip rings
(g)
. This voltage
increases the strength of the magnetic field of the rotor
(b)
which in
turn, allows more voltage to be induced in the stator
(a)
and used via
the receptacles.
wc_gr003117
a
g
c
e
d
f
b
DC
DC
AC
AC
AC
AC
Summary of Contents for GP 3800A
Page 2: ......
Page 13: ...GP Repair Safety Information wc_si000169gb fm 9 1 4 Label Locations GND 88897...
Page 25: ...GP Repair Technical Data wc_td000169gb fm 21 Notes...
Page 50: ...Maintenance GP Repair wc_tx000546gb fm 46 4 11 Electrical Schematic GP 2500A...
Page 52: ...Maintenance GP Repair wc_tx000546gb fm 48 4 13 Electrical Schematic GP 3800A 0620010 rev 104...
Page 54: ...Maintenance GP Repair wc_tx000546gb fm 50 4 15 Electrical Schematic GP 3800A 0620010 rev 103...
Page 60: ...Maintenance GP Repair wc_tx000546gb fm 56 4 21 Electrical Schematic GP GPS 5600A 6600A rev 104...
Page 62: ...Maintenance GP Repair wc_tx000546gb fm 58 4 23 Electrical Schematic GP GPS 5600A 6600A rev 103...
Page 68: ...Maintenance GP Repair wc_tx000546gb fm 64 4 29 Engine Schematic all GP GPS 3800A 5600A 6600A...
Page 70: ...Maintenance GP Repair wc_tx000546gb fm 66 Notes...
Page 77: ...GP Repair Troubleshooting wc_tx000548gb fm 73 wc_gr003415 z y...
Page 87: ...GP Repair Troubleshooting wc_tx000548gb fm 83 Notes...
Page 95: ...GP Repair Troubleshooting wc_tx000548gb fm 91 wc_gr003148 b c d a...
Page 112: ...Troubleshooting GP Repair wc_tx000548gb fm 108 Notes...
Page 115: ...GP Repair Disassembly Assembly Procedures wc_tx000549gb fm 111 wc_gr003136 c e f f h f g a b d...
Page 119: ...GP Repair Disassembly Assembly Procedures wc_tx000549gb fm 115 wc_gr003138 a d e c b f g i h...
Page 121: ...GP Repair Disassembly Assembly Procedures wc_tx000549gb fm 117 wc_gr003139 d d c c e f a b...
Page 123: ...GP Repair Disassembly Assembly Procedures wc_tx000549gb fm 119 wc_gr003141 c a b d e f...
Page 124: ...Disassembly Assembly Procedures GP Repair wc_tx000549gb fm 120...
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