Property damage caused by overload of HMV
and HCS devices!
NOTICE
Comply with maximum allowed external DC bus capacitances! See electrical
data of the HMV and HCS components.
Property damage caused by overload of the
additional external capacitors!
NOTICE
●
Only use allowed components.
●
The properties of the additional capacitors have to comply with minimum
requirements:
–
Min. dielectric strength: DC 900 V
–
Max. discharge time: 30 min
–
Take measures against fire in the case of overload, e.g. by housing
the capacitors.
●
Connect correct polarity: Connect L+ to positive pole and L- to negative
pole of the additional capacitors.
●
For additional external capacitors, observe that the series
connection of these units can require a balancing device.
●
Size additional capacitors at the DC bus for 10% overvoltage
at the mains connection.
●
As the supply voltage increases the storable energy in the
DC bus decreases, because the differential voltage between
braking resistor switch-on threshold U
B
and DC bus voltage
U
ZW
(crest value of supply voltage) is reduced.
●
Take the service life of external capacitors into account.
The figure below illustrates the characteristic of the storable energy in the DC
bus versus mains voltage with fixed braking resistor switch-on threshold U
B
by the example of HCS02.1E devices.
Bosch Rexroth AG
DOK-INDRV*-SYSTEM*****-PR06-EN-P
Rexroth IndraDrive Drive Systems with HMV01/02 HMS01/02, HMD01, HCS02/03
254/309
Calculations
