The
Smartstart
6000
Instruction
Manual:
Smartstart
®
6000
IMI0042
rev
K
Page
3
Basic Soft Starter Operation
The
Zener
Smartstart
®
6000
is
a
reduced
voltage
controller
designed
for
starting
standard
3
Phase
induction
motors.
The
unit
is
solid
state,
using
a
microprocessor
to
control
inverse
parallel
(back
to
back)
pairs
of
SCR’s.
An
SCR/thyristor
is
a
semiconductor
device
that
latches
when
triggered.
Once
triggered
it
allows
current
to
flow
in
one
direction
only
and
turns
off
at
zero
current.
The
firing
angle
of
the
SCR’s
are
controlled
to
achieve
the
desired
acceleration
of
the
motor.
Soft
Starters
provide
the
following
benefits:
1.
Reduced
stresses
and
wear
on
the
mechanics
of
the
system
2.
Reduced
starting
currents
3.
Minimize
voltage
dips
on
the
supply
4.
Lowered
Peak
demand
charges
5.
Eliminate
belt
slippage
on
fans
6.
Smooth
acceleration
of
motor
/
load
SMART‐TORQ
®
Torque Control
The
Zener
Smartstart
®
6000
incorporates
a
closed
loop
torque
control
system
to
provide
better
control
over
starting
&
stopping
3
phase
induction
motors.
Conventional
voltage
ramp
control
systems
typically
produce
low
torque
at
low
speeds.
When
starting
&
stopping
variable
torque
loads
(e.g
Pumps)
this
can
results
in
a
very
rapid
acceleration
or
deceleration
with
a
non
linear
change
in
motor
speed.
The
Smartstart
®
6000
series
overcomes
these
issues
by
regulating
the
torque
in
the
motor
to
match
the
load
type
during
the
acceleration
&
deceleration.
This
essentially
allows
a
constant
torque
to
be
produced
in
the
motor.
The
continual
monitoring
of
the
motor
characteristics
during
the
ramp
also
allows
instantaneous
adjustment
of
the
starter
output
to
allow
for
changes
in
load
conditions.
The
‘SMART
‐
TORQ
®
’
control
system
provides
smooth
starting
&
stopping,
allowing
ramp
profiling
to
produce
a
linear
acceleration
and
deceleration
of
the
motor
speed.
There
are
many
benefits
with
variable
torque
loads
(such
as
pumps
and
fans)
by
achieving
a
linear
ramp
profile
and
greater
control
over
deceleration.
With
pump
applications
this
provides
better
control
to
minimize
water
hammer
problems.
SMART‐TORQ Benefits include:
1.
A
true
linear
acceleration
of
the
load
and
motor
for
all
load
types.
2.
Reduced
peak
inrush
starting
currents.
3.
Reduced
stresses
and
wear
on
the
mechanics
of
the
system
4.
Ramp
profiling
to
better
match
type
of
load
such
as
variable
torque
loads.
Better
control
of
pumps
and
fans,
without
rapid
initial
ramp
but
linear
ramp.
5.
Reduced
heating
in
motor
at
low
speeds.
6.
No
instability
due
to
changing
power
factor.
Closed
loop
system
to
monitor
and
react
to
changing
power
factor.
7.
No
instability
due
to
slot
ripple
in
3
wire
and
6
wire
operation.
8.
Better
control
of
deceleration
through
closed
loop
torque
control
system.
The
Smartstart
®
6000
offers
user
access
to
ramp
profiling
parameters
to
fine
tune
the
Torque
Control
System
to
achieve
more
application
specific
performance
requirements.
See
Page
44
for
more
information.
Содержание SMARTSTART 6000
Страница 1: ...ZENER VARIDRIVE SOLUTIONS ZENER SMARTSTART 6000 Soft Starter Instruction Manual...
Страница 2: ......
Страница 49: ...Appendix B Application Diagrams Technical Manual Smartstart 6000 IMI0042 rev K Page 46 General Purpose...
Страница 51: ...Appendix B Application Diagrams Technical Manual Smartstart 6000 IMI0042 rev K Page 48 Irrigation Pump...
