Increasing Starting Torque - Toshiba TOSVERT VF-AS3 Instruction Manual

5. 2. 6
<vb: Manual torque boost 1>
Basic parameter
■ Function
The starting torque is increased by increasing the setting value when starting torque is required. It is
valid when the setting value of <Pt: V/f Pattern> is "0: V/f constant", "1: Variable torque", or "7: V/f 5-
4
point setting".
5 ■ Parameter setting
Title
vb
*1 Depending on the capacity. Refer to [11. 6].
■ Reference of setting
100% is based on the base frequency voltage.
Set the value within +2% of the default setting.
9
Important
5. [Fundamental operation] How to use parameters

Increasing starting torque

Parameter name
Manual torque boost 1
Output voltage (V)
<vLv: Base frequency voltage>
<vb> (%)
• The optimum value is programmed for each inverter capacity by default setting. When a value
larger than the reference value is set, an overcurrent trip may occur at startup.
• Repeated operation with excessive torque boost may cause failure of IGBT in the power circuit.
When larger stating torque is required, consider using vector control.
For details, refer to [5. 2. 4].
vb
Min: 0.00
X1000
Adjustment range
0.00 - 30.00
0 0
<vL: Base frequency 1>
5-50
E6582062
STOP 0.0Hz
15:25
:Manual torque boost 1
4.80
%
Max: 30.00
X100 X10 X1
Unit Default setting
%
*1
Output frequency (Hz)