15-18 Calculations Rexroth IndraDrive
DOK-INDRV*-SYSTEM*****-PR02-EN-P
Nominal Voltage of 24V Supply
The nominal voltage results from the intersection of the allowed voltage
ranges of the components used.
Continuous Current Capacity of 24V Supply
The continuous current capacity of the control voltage supply has to
correspond at least to the sum of continuous currents of the connected
components. The continuous current results from the power PN3 of the
components and the nominal voltage of the selected 24V supply.
Note: The continuous current of a drive controller consists of
• the continuous current of the control section
• the continuous currents of the optional modules of the
control section that are used
• the continuous current of the power section
• the continuous current of motor brakes to be operated.
Peak Current Capacity of 24V supply
The peak current capacity of the control voltage supply has to correspond
at least to the sum of peak currents of the connected components for the
duration of the inrush current.
Note: The peak current of a drive controller consists of
• the peak current of the control section
• the peak currents of the optional modules of the control
section that are used
• the peak current of the power section
• the peak current of motor brakes to be operated.
To determine the required peak current capacity of the 24V supply the
following approximate calculation is allowed:
contpeak
II ×≥ 2,1
I
peak
: required peak current capacity
Fig. 15-45: Approximate calculation I
peak
from I
cont
for 24V supply
The 24V supply has to be able to supply the current I
peak
for at least
100 ms.
15.7 Determining the Braking Behavior when Using DC Bus
Resistor Unit HLB01 (DC Bus Short Circuit)
in preparation
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