
BC
GENERATOR
The BC generator is a brushless, self-excited generator which requires only the driving force
of
the engine
to
produce an AC output. The stator houses
two
sets
of
windings: the main stator windings and the exciter
windings. When the generator is started, residual magnetism
in
the four rotating poles induces a current in
the stator exciter windings. This flow of current then induces a greater current flow through the four rotat-
ing poles which then generates an even larger current in the exciter windings. This mutual build
up
of
cur-
rent in the four rotating poles and in the exciter windings quickly reaches the saturation point
of
the
capacitor(s) and a regulated energy field is then maintained in the stator. At the same time, this regulated
field produces a steady voltage in the stator windings which then can be drawn off the generator's AC ter-
minals to operate AC equipment.
A
r---------,
I
I
I
,
I
IDIDDE
,DIODE
I
--t--
I
I
I
,
I
L
_________
...J
D
r-----------------------------------------,
I I
I I
I
DC
1
I 1
1
AC
+
CHARG
·1
1 I
I
AC
I.C.
I
I I
I
BRIDGE
INTEGRAL
I
I RECTIFIER
CONTROllER:
~
____
""1
________________
-l
-----~Dl
T
E
R
------O2~
------<:>
3 =
_____
-Q4
L
B
B
BAllAST RESISTOR
_._._
60
HZ
I.
C.
DC
CHARGE
L
o
INTEGRAL
CONTROllER
C
------05
K
EARLIER
MODElS
------0
6
__
...J
I
I
I
1
o
5
o
4
o
2
o
3
o
6
o
Ie
91
1
AC
TERMINAL
BLOCK
I
t:iPH~
!
L
____________
...I
i
tCAPiC~
!
L
___________
...J
BC
6.5KW
and
6.0KW
BC
4.0KW
and
4.4KW
Generator Internal Wiring Schematic with
DC Battery Charging Circuit
A.
Rotating Field/Auxiliary
Windings with Diodes
B.
Integral Controller with Ballast Resistor
(Earlier Models)
C.
Exciter Windings and Capacitor(s)
D.
Bridge Rectifier and Intergral Controller
Generator Frequency
Frequency is a direct result
of
engine/generator speed: 1800
RPM
-60
Hertz, 1500
RPM
-50
Hertz To change
the generator's frequency, refer
to
the "MAINTENANCE AND ADJUSTMENTS" section
of
this manual, page
72.
Westerbeke Generators
54
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