Ford FALCON XA Series Repair Manual page 539

13-22
PART
13-4
ALTERNATOR REGULATOR· BOSCH
Section Page
I Description and Operation .... . ........ .. .. 13-22
2 In-Car Adjustment and Tests ............ 13-24
VIBRATING CONTACTS
FIG. 26- Bosch Regulator
REGULATOR
0 0
FIG. 27- Voltage Reg. Test (Bosch)
DESCRIPTION
The BOSCH alternator regulator
is a single element electro-mechanical
voltage regulator only (Fig. 26).
Because of the inherent current
control of an alternator caused by the
inductive reactance of the stator no
current limiter is required and as
the rectifier diodes prevent reverse
current flow from the battery no
cut-out is required either.
The voltage regulator is a double
contact vibrating unit incorporating
a positive temperature co-efficient
resistor.
An electro-magnet attracting the
armature blade against spring tension
provides the voltage control.
A wire wound choke is used in the
field circuit to smooth out voltage
surge and prolong point life.
OPERATION
There are three phases of opera-
tion of the voltage regulator.
1. Lower points closed - no
regulation Fig. 29.
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