GEFRAN-SIEI ARTDrive Vector V2 Series - Page 220

Index
MENUMENU
MENUMENU
MENU [Unit] Access Default Min/Max Format Reg.Mode Level Ipa
Parameter Name
Description
Chapter 6 Parameter • 220 ARTDrive V2 series - Instruction Manual
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 SPEED REG / Speed droop
NOTE! Menu accessible with Access Level = FULL
The Function of the Droop Block is active only in a Sensorless and Field oriented mode.
The Block is made of:
- a comparison node between the torque reference (generated by the speed
regulator or by torque ref ) and the Droop Comp variable
- a proportional regulator whose output is (added or subtracted) to the overall speed
reference. This is supplied with a low passing filter and a limit on the correction to
be provided.
This function is used to realize a current scale. It is typically used when two motors are
mechanically combined one with the other (ex. they are connected on the same shaft).
They both must rotate at the same speed.
If one of the two motors tends to rotate at a higher speed, the consequence is a
difference typical for the control Drives and an overload condition.
The second motor acts as a brake. Such a condition causes an unbalance between the
two currents, which can be eliminated via the Droop Function.
By adding a correction term to the Drive speed reference (proportional to the load
difference), the two currents on the motors are balanced again.
The F05.00 - Droop en src source states the origin of the signal enabling the Droop
function. F05.01 - Droop comp src allows the connection of the Droop reference
signal (standard connected to the Droop comp internal reference).
In the Block configurations it is possible to set: with F05.10 - Droop gain the function
gain, with F05.11 - Droop filter the time constant of the input filter, with F05.12 - Droop
limit the allowed reference correction limit and with F05.13 - Droop comp the value of
the internal reference.
It is possible to monitor the block output, F05.20 - Droop out (in rpm).
Droop comp src
Droop en src
Droop out
Torque
Droop gain Droop comp Droop limit
X
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+
Figure F08: Speed Droop block