User`s manual

apfiff09 marine vacon • 177
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7.9 Speed Control settings
P2.9.1 Load drooping ID620
The drooping function enables speed drop as a function of load. This parameter sets the
value corresponding to the nominal torque of the motor.
Torque [%]
Reference
100 %
Speed [rpm]
Actual
10 %
Example: If load drooping is set to 10 % for a motor that has a nominal frequency of 50
Hz and is nominally loaded (100 % of torque) the output frequency is allowed to decrease
5 Hz from the frequency reference. The function is used for e.g. when balanced load is
needed for mechanically connected motors.
P2.9.2 Load Drooping Time ID656
This function is used in order to achieve a dynamic speed drooping because of changing
load. The parameter defines the time during which the speed is restored to the level it
was before the load increase.
Actual speed
[rpm]
Torque