Table of Contents
13-10
Appendix
• to ensure a sufficient interference suppression.
The combining filters are exclusively provided for the operation with
HMV01.1R/E supply modules. On the filter outlet side no other devices
may be connected. If other components in the control cabinet are to be
suppressed, it is necessary to employ an appropriate interference
suppression which should preferably be installed at the control cabinet
entry
Note:
• It is not advisable to switch an additional interference suppression with
the HFD in series, as non-linear procedures in the interference
suppression filter (saturation of the chokes) could affect the combining
filters' effect.
• Make sure there aren't any circuits with resonance produced, for
example, by compensating capacitors, transformers, lines
capacitive contents of the filters that are not matching.
• Exceeding the allowed limit values for the high-frequency voltage
contents at the filter can damage or destroy the filters and the
capacitors at the mains choke.
• Rexroth does not supply HFD filters for asymmetric mains. If required,
the appropriate HFD filters must be selected for the specific
installation.
It is only allowed to operate combining filters within the allowed mains
voltage range. Harmonics (f
temperature rise of the dielectric material of the capacitors built in the
filters.
You can calculate the temperature rise using the following formula:
U
:
measured voltage value at frequency f
Mn
U
:
voltage limit value for frequency f
Gn
∆T
:
calculated temperature rise of the dielectric material for frequency f
n
Fig. 13-9: Calculating the temperature rise of the dielectric material
The temperature rises have to be added up for all frequencies f
(f
: frequency at which the voltage derating starts; see Fig. 13-11):
k
m
∑
∆
=
T
ges
=
v
1
U
:
voltage value at frequency f
Mv
U
:
voltage limit value for frequency f
Gv
∆T
:
calculated temperature rise of the dielectric material for all
ges
frequencies
Fig. 13-10: Calculating the temperature rise of the dielectric material for all
frequencies
By means of the above formulas and the measured voltages it is possible
to determine the real load of a filter with voltages of higher frequencies.
To do this, it is necessary to measure by means of Fourier analysis, for all
combinations of line/line and line/PE, the r.m.s. value of the voltage on the
mains side of the filter with all occurring frequencies (higher than f
always have to measure the voltages under conditions of operation at the
nominal working point, the filter having been installed. By means of the
measured values it is then possible to calculate the temperature rise. To
) on the mains voltage will lead to a
n
(
)
2
[ ]
10
x
U
∆
=
Mn
T
K
(
)
n
2
U
Gn
n
n
(
)
m
2
∑
10
x
U
∆
=
Mv
T
(
)
v
2
U
=
v
1
Gv
v
v
DOK-INDRV*-HMV-*******-PR01-EN-P
Rexroth IndraDrive
or
n
≥ f
n
k
[ ]
[ ]
≤
K
10
K
). You
k
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