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• The maximum frequency value is determined in compliance with the ratings of the motor being
used .
.. The output frequency ranges from 0.1 to the maximum frequency .
.. The maximum frequency setting cannot be changed while the motor is running. Instead, you
should stop the inverter and then set the value again.
3.5.2
Torque
boost [ ub ]
When you want to increase the start-up torque of your motor, adjust the torque boost setting. The
torque boost value (
ub )
can be set within a range of 0% to 30%
o~
the rated output voltage.
Output voltage
100%
5% (vb)
0%
1 . -_ _ _ _ _ _ _ _ ......... _ _ _
--1.._
Output frequency
50Hz
0.5Hz
(60Hz)
80Hz
Figure 3.3 Setting to increase start-up torque
• An excessive torque boost setting may cause an overcurrent trip at a start-up.
[Operating procedure]
Example
I
operation
, 2)
I
MON
!
3)
I
1
!
, - I _ _ _
, 3 )
I
READ
I
4)
i
0
I
-lsi
or
[61
• 5)! WRT
.6)
i
MON
Action
: 110.G - :
t'::1P
:l1o.:-:ub
I
r : : :
D=-A:-::T;:;-AC:-! value is displayed.
:
3
I
The displayed value can be changed either with the numerical keys or the .
I
increase/decrease keys. Adjustment can be made while observing the
I
load coditions during a run.
I
I
i
The renewed data value can be set.
5 --
:ub ...... :
5
Returns to the original display.
(OFF. G.G
and frequencies)
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