Vacon 100 - Torque Stabilator Function

P3.1.4.12.1 I/F START (ID 534)
When you activate the I/f Start function, the drive starts to operate in the current control
mode. A constant current is led to the motor until the output frequency increases above the
level that is set in P3.1.4.12.2. When the output frequency increases above I/f Start
Frequency level, the operation mode changes back to the normal U/f control mode.
P3.1.4.12.2 I/F START FREQUENCY (ID 535)
When the output frequency of the drive is below the limit of this parameter, I/f Start function
activates. When the output frequency is more than the limit, the drive operation mode
changes back to the normal U/f control mode.
P3.1.4.12.3 I/F START CURRENT (ID 536)
With this parameter, you can set the current that is used when the I/f Start function is
enabled.
9.1.2 TORQUE STABILATOR FUNCTION
P3.1.4.13.1 TORQUE STABILATOR GAIN (ID 1412)
P3.1.4.13.2 TORQUE STABILATOR GAIN AT FIELD WEAKENING POINT (ID 1414)
The torque stabiliser stabilises the possible oscillations in the estimated torque.
Two gains are used. TorqStabGainFWP is a constant gain at all the output frequencies.
TorqStabGain changes linearly between the zero frequency and the field weakening point
frequency. The full gain is at 0 Hz and the gain is zero at the field weakening point. The figure
shows the gains as a function of output frequency.
P FieldWeakeningPoint
P TorqStabGainFWP
Effective gain
FreqOut
Gain
P TorqStabGain
Fig. 26: The torque stabilator gain
P3.1.4.13.3 TORQUE STABILATOR DAMPING TIME CONSTANT (ID 1413)
The damping time constant of the torque stabiliser.
PARAMETER DESCRIPTIONS VACON · 233
24-HOUR SUPPORT +358 (0)201 212 575 · EMAIL: VACON@VACON.COM
9