DC 750 V (controlled supply)
Data used for the diagrams:
●
Maximum peak current of 3 × I
Bypass
: 75 A
●
Threshold of braking resistor in supply unit or converter: 820 V
See also "P-0-0833, Braking resistor threshold"
See also "P-0-0860, Converter configuration"
A)
Peak power when decelerating
B)
Peak power when accelerating (n < 0.8 × n
eck
; n
eck
: speed at
which the torque characteristic is inflected)
C)
Peak power when accelerating (n < 0.9 × n
eck
; n
eck
: speed at
which the torque characteristic is inflected)
P
P
Maximum peak power (sum of all P
DC_max
in the drive line)
l
total
Sum of the lengths of all hybrid cables at a KCU
Tab. 7-2:
Available Peak Power vs. Cable Length for DC 500 V and DC 750 V
Peak Power when Accelerating
Due to voltage drops, less peak power is available at KSM/KMS with increas‐
ing length of the motor cable. During acceleration, this becomes noticeable
by the reduction of the corner speed. The figure shows exemplary curves of
reduction to 80% and 90% of the data sheet corner speeds. The maximum
speed is proportional to the DC bus voltage available at the motor.
In the drive line, place the KSM/KMS with the greatest power as
near as possible to the output of KCU.
Examples
●
DC 750 V and 100 m of cable length:
–
Motive and regenerative: Max. 47 kW
–
With 34 kW, a maximum speed of approx. 90% of the corner speed
can be reached in motive form.
●
DC 565 V and 100 m of cable length:
–
Motive: Max. 32 kW
–
Motive: Max. 45 kW
–
With 18 kW, a maximum speed of approx. 90% of the corner speed
can be reached.
Bosch Rexroth AG
DOK-INDRV*-KCU02+KSM02-PR03-EN-P
202/337
Rexroth IndraDrive Mi Drive Systems with KCU02 KSM02, KMS02/03, KMV03, KNK03
Notes on project planning
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01
