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System Manual – MOVIDRIVE® compact Drive Inverters
4
Selecting the braking resistor
Project Planning
Overload factor
for braking
resistors
In braking operations within the cycle duration T
D
(standard: T
D
≤
120 s), the resulting
cdf braking power can be determined using the overload factor (
→
following diagrams.
When determining the load capacity, take the DC link voltage dependent on the peak
braking power into account.
The cdf braking power is calculated using the following formula:
cdf braking power = continuous braking power
×
overload factor
Overload factor for
flat-type braking
resistors
59008AXX
Figure 80: Overload factor depending on the cyclic duration factor for flat-type braking resistors
Cyclic duration factor
(cdf)
1 %
3 %
6 %
15 %
25 %
40 %
60 %
80 %
100 %
Overload factor (ÜF)
8.7
8.6
4
2.6
1.83
1.5
1.2
1.12
1
ED [%]
1%
6% 10% 20% 40% 60% 100%
20
10
1
3
ÜF
Summary of Contents for MOVIDRIVE compact MCH41A
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