Bosch Rexroth IndraDrive Mi Project Planning Manual page 110

102/152 Bosch Rexroth AG | Electric Drives
Notes on Project Planning
Available Power at a String of
Drives
Continuous Power
Peak Power
and Controls
Comply with UL rating I
In the case of equal load, the greatest load of the hybrid cable is
onyy the first cable segment.
In the string of drives, place powerful KSM01 as near as possible
to the output of the electronic control system KCU01.
Observe the maximum allowed bypass current I
ment (see technical data of KSM01).
If necessary, install other KCU01 devices.
Available power P
KCU_strang
P Available power at string of drives
KCU_strang
U Output voltage, depending on supply unit
out
I Output current; see technical data of KCU01
out_max
Fig.7-12: Available power at a string KCU01
With a small number of KSM01 and a low degree of power consumption in a
string of drives (partial load operation), the measurable value I
of KCU01 is above the value which would result from the calculation of the
power P of KSM01 and U
LN
rents; the influence of these currents is insignificant in operation under rated
conditions.
Comply with continuous power
The sum of the electric powers of all KSM01 of a string of drives
mustn't exceed the calculated value P
control system KCU01.
P Rated power KSM01
LN_nenn
P Available power at string of drives
KCU_strang
Fig.7-13: Checking the continuous power
Instead of P
tinuous power of the KSM01.
Taking the average speed and simultaneity factor into account, the
sum of the installed rated motor powers therefore can be signifi‐
cantly higher with servo operation.
For data of the simultaneity factor with servo drives at machine tools
and the determination of the power by means of speed and torque
characteristic: See formulas in the chapter "Calculations" of the
Project Planning Manual "Rexroth IndraDrive, Drive System".
Comply with peak power KCU01
The sum of the electric powers of all KSM01 of a string of drives
mustn't exceed the indicated value P
system KCU01.
Rexroth IndraDrive Mi | Project Planning Manual
!
Bypass
at a string of drives:
of KCU01. The deviation is due to wattless cur‐
out
, it is allowed to use the actually occurring con‐
LN_nenn
DC_max
in each seg‐
Bypass
at the output
strang
of the electronic
KCU_strang
of the electronic control