Toshiba VF-AS1 Power Supply User Manual


 
E6581528
F-26
6
[Parameter setting]
Title Function Adjustment range Default setting

Base frequency voltage 1
(output voltage
adjustment)
~ V
 Refer
to page K-2.

Base frequency voltage
selection
(correction of supply
voltage)
:
Without voltage compensation (limitless output voltage)
:
With voltage compensation (limitless output voltage)
:
Without voltage compensation (limited output voltage)
:
With voltage compensation (limited output voltage)
If  is set to or , the output voltage will change in proportion to the input voltage.
Even if the base frequency voltage () is set above the input voltage, the output voltage will not exceed the
input voltage.
The rate of voltage to frequency can be adjusted according to the rated motor capacity. For example, setting
 to prevents the output voltage from increasing, even if the input voltage changes when the operation
frequency exceeds the base frequency.
When the V/f control mode selection parameter () is set to any number between ~ or ~, the supply
voltage is corrected regardless of the setting of .
[=: Supply voltage uncorrected, output voltage
unlimited]
[=: Supply voltage corrected, output voltage
unlimited]
Input
voltage
High
Low
Output frequency
Output
voltage
[V]

0
Input voltage
Input
voltage
High
Low
Output voltage
[V]
Output frequency

0

* The above applies when V/f control mode selection
parameter  is set to , or .

Rated voltage
>1 the output voltage can be
prevented from exceeding
the input voltage.
* Note that a voltage higher than  is applied at
output frequencies over the base frequency , even
if  is set below the input voltage.
[=: Supply voltage uncorrected, output voltage
limited]
[=: Supply voltage corrected, output voltage
limited]

Input
voltage
High
Low
Output frequency
Output
voltage
[V]
0
Input voltage

Input
voltage
High
Low
Output voltage
[V]
Output frequency

0

* The above applies when V/f control mode selection
parameter  is set to , or .

Rated voltage
>1 the output voltage can be
prevented from exceeding
the input voltage.
Note: Rated voltage is fixed for 500V class at 500V, 575V class at 575V and 690V class at 690V.