Bosch Rexroth IndraDrive CsDrive System with HCS01 Project Planning Manual page 52

50/341 Bosch Rexroth AG
Combining the individual components
Drive controller
HCS01 with 3 × AC 230 V
HCS01 with 3 × AC 400 V
HCS01 with 3 × AC 480 V
● With mains voltage up to 3 AC 230 V:
Allowed periodic peak voltage (crest value) of third-party motor between
phase-phase and phase-housing: < 850 V
(To operate motors which do not require any voltage-reducing compo‐
nents at this mains voltage, the switch-on threshold of the braking resis‐
tor must be reduced to DC 430 V for devices with the mains connection
voltage identifier "03"!)
● The voltage change (dv/dt) and periodic peak voltage (U
terminals are influenced by the length and the electrical properties of the
motor cable:
– The longer the motor cable, the higher the degree of voltage over‐
shoot (periodic peak voltage) at the motor-side cable end. With a
cable length of approx. 25 m and more, the maximum periodic
peak voltage occurs. Further voltage increase is not to be expected
even with longer cables.
– With cable lengths of less than 15 m, the periodic peak voltage is
reduced, depending on the length and as compared to the speci‐
fied maximum value, down to the DC bus voltage value.
Apart from the nominal current I
allowed switching frequency of the power output stage (f
count with which the motor filter HMF may be operated.
Verify the success of the voltage-reducing measures by measur‐
ing the voltage at the motor terminals. Use an isolated measuring
device!
Minimum Inductance of Third-Party Motor
Depending on the drive controller used, the motor has to have a minimum
value for inductance. The actually available inductance of a motor can be
measured directly between two motor terminals by means of an inductance
measuring bridge. The measurement has to be made for a complete motor
wired for normal operation but not yet connected. During the measurement,
one motor terminal remains open! For asynchronous motors, the measured
value can only be used if the rotor doesn't have closed slots!
Minimum required motor inductance
L = 60 × 4 / (√2 × I × f ) (in mH)
U-V Typ s
L = 80 × 4 / (√2 × I × f ) (in mH)
U-V Typ s
L = 116 × 4 / (√2 × I × f
U-V Typ
I Maximum current of drive controller according to type code
Typ
(rms value)
f Desired switching frequency in kHz
s
Tab. 4-8: Minimum Inductances Depending on Drive Controller Data, Supply
Units and Supply Voltage
Install a three-phase choke in the motor feed wire, if the inductance of the
third-party motor is smaller than indicated in the table above. This choke has
to increase the inductance that can be measured between two motor termi‐
nals to the minimum value.
DOK-INDRV*-HCS01******-PR05-EN-P
Rexroth IndraDrive CsDrive Systems with HCS01
, especially take the maximum
N
) (in mH)
s
) at the motor
pp
) into ac‐
s