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121
CHAPTER
7
7.1
APPLICATIONS AND
PROGRAMMING
Below are some suggested characteristic curves showing the
current and starting toque behavior by considering some load and
control types:
APPLICATIONS AND PROGRAMMING
This Chapter is useful for setting and programming the start control
type according to the application.
ATTENTION!
Important information about each start control type.
ATTENTION!
For
correct
parameter
setting
you
must
consider
the
load
data
and
use
WEG
Sizing
Software,
available
at
WEG
Site
.
If
this
site
can
not
be
accessed,
you
can
follow
some
practical
concepts
described
below:
Although, if you cannot use it, a few practical principles are
described in this chapter.
Figure 7.1
– Characteristic torque and current curve in a direct on-line start and by Voltage Ramp
Figure 7.2
– Characteristic torque and current curves during a start with current Limit and Torque Control
I/In
C/Cn
Current
Torque
Cn
In
0
25
50
75
100% rpm
0
25
50
I/In
C/Cn
Current
Torque
Cn
In
0
25
50
75
100% rpm
I/In
C/Cn
Current
Torque
Cn
In
0
25
50
75
100% rpm
I/In
C/Cn
Current
Torque
Cn
In
0
25
50
75
100% rpm
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