Toshiba TOSVERT VF-nC3 - Page 137

E6581595
F-30
6
6.12.5 Output voltage adjustment/Supply voltage correction
 : Base frequency voltage 1
 : Supply voltage correction (output voltage limitation)
 Function
Supply voltage correction: Prevent torque decline during low-speed operation.
Maintains a constant V/F ratio, even when the input voltage fluctuates.
Output voltage limitation: Limits the voltage to prevent outputting the voltage over base frequency
voltage (vlv).
Applied when operating a special motor with low induced voltage.
[Parameter setting]
Title Function Ad
j
ustment ran
g
e Default settin
g
 Base frequenc
y
volta
g
e1 50
-
330
(
V
)
*1

Supply voltage correction
(output voltage limitation)
0: Supply voltage uncorrected,
output voltage limited
1: Supply voltage corrected,
output voltage limited
2: Supply voltage uncorrected,
output voltage unlimited
3: Supply voltage corrected,
output volta
g
e unlimited
*1
*1: Default setting values vary depending on the setup menu setting. Refer to section 11.5.
 For supply voltage uncorrected (= or ), the output voltage will change in proportion to the input
voltage.
 Even if the base frequency voltage ( parameter ) is set over the input voltage, the output voltage will
not outputted over the input voltage.
 When the V/F control mode selection parameter () is set to any number between 2 to 4, the supply
voltage is corrected regardless of the setting of .