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Testing the Battery Charging Circuit
NOTE: This circuit is totally separate from the AC output of the generator. The AC output
of
the generator effects this circuit's output but not the reverse.
1. Bridge Rectifier
Normal AC voltage running to the rectifier (while the engine is operating at 1800 rpm) is measured across
the two AC connections on the bridge rectifier. (See the illustration below.)
AC voltage running to the bridge rectifier (approximate):
No-load off the generator
16.0 Volts AC
Full-load off the generator
17.5 Volts AC
DC
AC
+
AC
-t>I-
I.C.
BRIDGE
RECTIFIER
INTEGRAL
CONTROLLER
Normal DC voltage running out of the rectifier (in Volts DC) is measured across the two DC connections
of the bridge rectifier; that is,
+
and - .
DC voltage running from the bridge rectifier (approximate):
No-load off the generator
17.0 Volts DC
Full-load off the generator
18.5 Volts DC
2. AC Stator Winding: 0.14 Ohms
Lift
the two AC leads off the bridge rectifier and measure with an ohmmeter the resistance between these
two leads should measure 0.14 Ohm. No continuity should exist between these two leads and the ground.
3. Testing the Bridge Rectifier
A.
Set your Ohmmeter's scale on RX1
(+
DC) and set the needle to zero.
B. Connect the (
+)
positive lead from the Ohmmeter
to point #4. Taking the Ohmmeter's negative (-)
lead, momentarily touch points #1, #2, #3, and #5.
The Ohmmeter should register no deflection for any
of the points touched.
C. Remove the positive
(+)
lead from point #4 and
connect the negative (-) lead; momentarily touch
points #1, #2, and #3. The Ohmmeter's needle
should deflect when each point is touched.
D. Leaving the negative (-) lead on point #4, touch
point #5 with the positive lead.
No deflection
should take place.
Westerbeke Generator
40
- . - _ Point
#3
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