Fig. 2. Cross Sectional view typical integral charging system
C a p a c i t o r C3 smooths out the voltage across
R4. Resistor R5 raises the generator voltage slight-
ly as generator output increases to maintain a more
nearly constant voltage across the battery by com-
pensating for line drop.
DELCOTRON INTEGRAL
CHARGING SYSTEM
TROUBLESHOOTING PROCEDURES
Fig. 3. Negative ground circuit
pre-set voltage is reached, diodes D5 and D6 con-
ENERGIZING SPEED
duct, TR3 turns on, TR1 and TR2 turn off, and the
generator voltage decreases Diodes D5, D6 and
The energizing speed is the rpm at which the
TR3 then turn off, TR1 and TR2 turn back on, and
regulator turns on to energize the field coil. This
the cycle repeats many times per second to limit
speed is higher than some speeds at which output
the generator voltage to the adjusted value.
can be obtained. Therefore, when checking out-
p u t at low speeds, increase the speed until the
regulator turns on, then reduce the speed to check
Capacitor C1 protects the generator diodes from
the output. No output can be obtained until the
high transient voltages, and suppresses radio inter-
regulator turns on. Once the regulator turns on, it
ference.
will remain turned on until the engine is stopped.
Capacitor C2 used on 24 volt systems only causes
TR1 and TR2 to turn on and off quickly. Diode D4
RATED VOLTAGE
p r e v e n t s high field-coil-induced voltages when
TR1 and TR2 turn off.
O n the 24-volt system, the Integral Charging
[59]
