Controlling the
Transfer Corona Current and
the Grid Bías
Figure 3-27 shows the
which
current for the
corona
and the
of
grid
has
following
functions:
the
corona current
and OFF;
value;
Switches the grid bias
of the
corona
the grid bias
of the primary
corona
Theoutputtotheprimarycoronaunit iscontrolled
toa
value; the shield current
eliminate
effects of
corona discharge.
The primary corona current and transfercorona
current are
and OFF by the high-voltage
(HVTON).
The grid bias
switched by
grid
bias control
(GRDON).
O P E R A T I O N S A N D T I M I N G
When HVTON
amplifier circuit goes OFF.
transformer goes OFF.
When HVTON 0,
amplifier
goes
generatorcircuit goes
transformer goes
a corona current larger than the specific value
flows from
primary corona
of
the
of the
backsignal
decreases
corona current from the
corona
thereby controlling
current a specific value.
If
flows
output
of the
high-voltage transformer
for
the
control mechanism activated keep
the flow a specific value.
D C
P C S
( H V T )
1
c o r o n a
C A N O N
C A N O N
M A Y
I N
Summary of Contents for NP-2020
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