TM11-6130-381-14
CHAPTER 4
FUNCTIONING OF EQUIPMENT
4-1. Basic Ac Phase-Controlled Current Regulator
conduction time of Q6001 and Q6002. Figure 4-2
shows the voltage waveform at the cathodes of
r e c t i f i e r s Q6001 and Q6002 with respect to
of a basic ac phase-controlled current regulator.
T 6 0 0 1 . The dc component of the voltage is
The voltage for the charging current to the battery
proportional to the conducting angle. The dc
is supplied by the bridge circuit, made up o f
current in the charging path is determined by the
CR6006, CR6007, and silicon-controlkd rectifiers
differece between the sum of the dc component of
Q6001 and Q6002. Inductor L6001 filters the
the rectified voltage and the battery voltage,
charging current to the battery, and CR6005 is a
divided by the resistance in the charging path. As
commutating diode that provides a current path
the battery voltage changes (or the ac line voltage
between L6001 and the battery when silicone-
changes), the conduction angle of the silicon
controlled rectifiers Q6001 and Q6002 are not
controlled rectifier is varied so that a constant
conducting. Resistor R6009 (fig FO-1) removes
current is maintained through the battery.
inductive transients from L6001. The dc current
through the battery is controlled by varying the
4-1
