Increasing Starting Torque - Toshiba TOSVERT VF-AS3 Instruction Manual

5. 3. 6

Increasing starting torque

<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-
point setting".
■ Parameter setting
Title Parameter name
vb Manual torque boost 1
*1 Depending on the capacity. Refer to [11. 6].
■ Reference of setting
100% is based on 200V, or 400V.
Set the value within +2% of the default setting, generally.
<vLv: Base frequency voltage 1>
• 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.
Important
For details, refer to [5. 3. 4].
Adjustment range
0.00 - 30.00
Output voltage (V)
<vb> (%)
0 0
<vL: Base frequency 1>
5-49
5. [Fundamental operation] How to use parameters
E6582062
STOP 0.0Hz
vb :Manual torque boost 1
4.80
Min: 0.00 Max: 30.00
X1000 X100 X10
Unit Default setting
%
*1
Output frequency (Hz)
15:25
%
X1
3
4
5
9