GE AV-300I - Speed Feedback Derivative Block Speed Up (Spd Fbk Deriv)

AV-300i Version 2 User’s Guide
—————— Function Description ——————
Ch.1
107
The Droop Block is shown in the figure below.
Droop comp src
Droop en src
Droop out
Torque
Droop gain Droop comp Droop limit
X
_
+
Speed droop src
Droop en src Source of the function enabling
Droop comp src Droop reference function
Speed droop cfg
Droop gain Function gain
Droop filter Filter time constant
Droop limit Allowed correction limit
Droop comp Internal value of the Droop reference
Speed droop mon
Droop out Block output correction
1.8.9 Speed Feedback Derivative Block “Speed Up” (Spd Fbk Deriv)
The Function is active only in a Sensorless and Field oriented mode.
The Block Function, Spd fbk derivative, is used to avoid oscillations or provide forcing in case of loads with a high moment
of inertia. It is made of a Derivative component in the feedback circuit, which is in a position to limit the “Overshoot”.
The function can be used in case of cyclical non-constant loads applied on the motor (ex. cams).
The Derivative component applied to the speed regulator Block is made of two components:
- motor speed
- output signal of the Speed up function
In the Block
configurations it is possible with Sfbk der enable to enable or disable the function, with Sfbk der
gain to set the % gain of the function, with Sfbk der base to set the basic % gain and with Sfbk der filter to set
the time constant of the derivative component.
Description:
SPEED CONFIG Spd fbk deriv
Sfbk deriv cfg
Sfbk der enable
Spfbk der gain
Sfbk der base
Sfbk der filter
SPEED CONFIG SAVE PARAMETERS