SEW-Eurodrive MOVIMOT flexible MMF3 C/DBC Series, Руководство по эксплуатации

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10
Project planning
Selecting the braking resistor
Operating Instructions – MOVIMOT
®
flexible
362
10.8.3 Selection criteria
The selection of the braking resistor takes place via the SEW‑Workbench . The re-
quired selection parameters for the braking resistor are calculated during the project
planning procedure. Depending on these selection parameters, a braking resistor is
selected from the table.
The following selection parameters are the basis for selecting the braking resistor.
Continuous braking power
The minimum required continuous braking power (braking power at 100% cdf) of the
braking resistor for load cycles can be calculated using the relative cyclic duration
factor cdf and the overload factor k.
If the cyclic duration factor cdf is unknown, it can be calculated from the cycle duration
t
tot
and the braking time t
B
using the following formula:
ED
t
t
B
tot
=
20179430539
ED Cyclic duration factor
t
B
Braking time
t
tot
Cycle duration
INFORMATION
The cycle duration must not exceed 120 s.
The overload factor OF can be determined using the diagrams in chapter "Overload
factor OF" and the cyclic duration factor cdf.
The value of the average braking power P
B
is taken from the project planning data of
the application:
P
P t P t P t
t t t
B
n n
n
=
× + × + + ×
+ + +
1 1 2 2
1 2
....
....
20179436555
P
B
Average braking power
P
n
Braking power section n
t
n
Braking time section n
The minimum required braking power at 100% cdf is calculated using the following for-
mula:
P
P
k
ED
B
100%
=
20179441035
P
100%cdf
Braking power at 100% cdf
P
B
Average braking power
k Overload factor
The braking power required by the application at 100% cdf must be smaller than or
equal to the typical braking power at 100% cdf (continuous braking power) of the bra-
king resistor.
29128668/EN – 12/2019