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CONSTANT TORQUE CONTROL MODE / AUTOMATIC TORQUE BOOST
In constant torque using automatic torque boost the starting torque boost value and frequency break point are used as starting
points for automatic torque boost. Voltage compensation gain and slip compensation gain are used for fine tuning adjustments.
Using parameters A046 and A047, you can obtain better performance under automatic torque boost mode (A041=01). See following
table for the concept of adjustment, including other parameters.
Torque Boost Function A041 01 = Automatic
Torque Boost Value A042 0.0 – 20.0
Torque Boost Break Point A043 0.0 – 50.0
VFD Torque Control Mode A044 00: Constant Torque
Voltage Compensation Gain A046 0 – 255
Slip Compensation Gain A047 0 – 255
FINE TUNING AUTOMATIC TORQUE BOOST
Motor torque is not enough at low speed
(The motor does not rotate at low speed)
Increase the voltage setting for manual torque boost,
step by step
A042
Increase the voltage compensation gain for automatic
torque boost, step by step
A046
Increase the slip compensation gain for automatic
torque boost, step by step
A047
Reduce carrier frequency b083
Motor speed decreases (stalls) when a load is
given to the motor
Increase the slip compensation gain for automatic
torque boost, step by step
A047
Motor speed increases when a load is given to
the motor
Decrease the slip compensation gain for automatic
torque boost, step by step
A047
The inverter trips due to overcurrent when a
load is given to the motor
Decrease the voltage setting for manual torque boost,
step by step
A042
Decrease the voltage compensation gain for automatic
torque boost, step by step
A046
Decrease the slip compensation gain for automatic
torque boost, step by step
A047
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