EVA
Manual
1
118144
‐
001
REV.
A
Chapter
1
EVA
HIGH
VOLTAGE
POWER
SUPPLY
INTRODUCTION
1.1
Description
of
the
EVA
Series
The
EVA
Series
of
high
voltage
power
supplies
provides
very
well
regulated,
low
ripple
high
voltage
in
a
highly
efficient,
compact
design,
specifically
for
electron
beam
coating
applications.
Extremely
stable
output
voltage
and
digitally
configurable
arc
intervention
circuitry
result
in
significant
performance
improvements
over
previously
available
technology.
All
of
these
advancements
are
possible
only
by
Spellman’s
long
history
in
high
voltage
power
conversion
technology.
This
series
of
power
supplies
utilizes
extremely
advanced
quasi
‐
resonant
PWM
conversion
techniques,
along
with
sophisticated
digital
technology.
Custom
units
to
meet
special
requirements
and
specific
applications
can
also
be
provided.
1.2
Standard
Features
The
EVA
Series
incorporates
several
standard
features
and
software
configurable
items
designed
to
optimize
user
utility,
satisfaction
and
safety.
FRONT
PANEL
CONTROL
POWER/HIGH
VOLTAGE
ON/
HIGH
VOLTAGE
OFF
SWITCHES
:
These
intuitive
front
panel
controls
allow
the
user
to
easily
turn
the
unit
on
and
enable/disable
the
generation
of
high
voltage.
FRONT
PANEL
INDICATOR
LAMPS
:
CONTROL
POWER
ON,
HIGH
VOLTAGE
OFF
and
HIGH
VOLTAGE
ON
indicators
are
integral
with
the
control
switches
and
equipped
with
dual
lamps
for
redundancy
and
safety.
FRONT
PANEL
POTENTIOMETER
:
A
ten
turn
potentiometer
is
provided
for
easy
programming
of
the
desired
voltage
regulation
value.
FRONT
PANEL
DIGITAL
METERS
:
3.5
digit
meters
are
provided
to
view
the
output
voltage
and
current.
A
convenient
Preset
View
Feature
is
provided:
If
the
HIGH
VOLTAGE
OFF
button
is
depressed
and
held
in,
the
present
voltage
and
current
programming
values
will
be
displayed
in
actual
kV
and
mA
on
the
front
panel
meters.
ETHERNET
AND
RS
‐
232
INTERFACE
:
DSP
based
SMT
circuitry
provides
both
Ethernet
and
RS
‐
232
digital
interfacing
capability
simplifying
the
integration
of
the
EVA
into
your
system
design.
A
VB
GUI
is
provided
for
the
RS
‐
232
and
Ethernet.
3U
‐
3/6kW
6U
‐
12kW
