TM 5-3810-300-24&P-3
7.1.1 REGULATOR FOR BATTERY-CHARGING GENERATOR
Fig. 3 - Transistorized Regulator
regulator incorporates the choke coil.
current. The generator voltage then decreases, and the
voltage contacts re-close. This cycle repeats many
times per second, thereby limiting the generator voltage
Operation
to the value for which the regulator is set.
When the engine starting switch is closed, the field relay
The magnetism produced in an accelerator winding,
winding is energized and causes the contacts to close.
when the voltage contacts are closed, aids the shunt
Current then flows from the battery through the relay
winding in opening the contacts. When the contacts are
contacts to the regulator "'F2" terminal. From this point,
open, the absence of the magnetism in the accelerator
the current flows through the generator field winding and
winding allows the spring to immediately re-close the
then through the transistor and voltage contact points to
contacts. This action speeds up the vibration of the
ground.
contacts.
CAUTION: Do not short across or ground
As the generator speed increases, the increased voltage
from the generator "BAT" terminal is impressed through
any of the terminals on the regulator or
the field relay contacts across the regulator shunt
the generator and do not attempt to
winding. The magnetism created in the winding causes
polarize the generator.
the voltage contacts to open, thus causing the transistor
to shut off the field
TRANSISTOR REGULATOR
The transistor regulator is composed principally of
the generator voltage to a pre-set value by con- trolling
transistors, diodes, capacitors, and resistors to form a
completely static electrical unit containing no moving
resistors act together to aid the transistor in performing
parts.
this function, which is the only function that the regulator
performs in the charging circuit.
The transistor is an electrical device which limits
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