Observe installed motor peak power
The sum of installed motor peak powers must be smaller than
maximum peak power P
P
indicated in the diagram.
If necessary, install more KCU devices.
Exception: When the design and arrangement within a drive line
ensure that the occurring motor peak powers do not add.
This is the case, for example, when the drives have been
mechanically connected in such a way that the energy flows to
the DC bus are inversely directed when decelerating. One drive
absorbs the energy which another drive in the same line delivers
when decelerating. These drives must be arranged side by side in
the line.
7.1.8 KLC03 DC bus capacitor unit
Application notes
Using a DC bus capacitor unit can increase the storable energy in the DC
bus.
● Increases the peak power within the DC bus
● Provides energy reserves in the case of mains failure (e.g., for return
motions)
● Avoids load peaks on the mains side (when using the
"Smart Energy Mode")
A maximum of 2 KLC03 at one KMV03 are allowed per drive line.
Resulting maximum DC bus capacitance (C
KMV03
+ 2 × C
KLC03
):
2.35 mF + 2 × 4.7 mF = 11.75 mF
Project planning software
The project planning software HMV_SmartEnergyMode.exe by Rexroth can
be used to size the DC bus capacitance. If necessary, please contact our
sales representative.
The project planning software calculates the minimum required DC bus
capacitance depending on the voltage offset to the mains peak.
The project planning software works with the following variables:
● DC bus power profile
(The DC bus power profile has to be available as an ASCII file with the
time values and the corresponding power values.)
● Supply unit (selection list)
● Mains voltage (selection list)
● Voltage offset to the mains peak as safety reserve (it is necessary to
enter a value)
226/407
Notes on project planning
IndraDrive Mi Drive Systems with KCU02, KSM02,
KMS02/03, KMV03, KNK03, KLC03
Bosch Rexroth AG R911335703_Edition 04
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