Lenze EMB9352−C - Manual (Page 86)

Dimensioning
Dimensioning examples
Complex movement
5
l
86 EDBMB935X DE/EN/FR 13.0
5.4.3 Complex movement
A complex movement is to be braked (e.g. multiple drive axes).
Provided data:
ƒ U
DC
= 725 V
ƒ Power characteristic in generator mode:
1 2 3 4 5 6 7 8 9 t [s]
5
10
15
20
25
30
35
40
45
50
55
60
65
P gen [kW]
1
0
9350br_16d
Fig. 6 Power characteristic in generator mode
Data provided by the diagram:
ƒ Max. regenerative power: P
gen,max
= 61.25 kW
ƒ Average regenerative power over 3 s: P
gen,ave
(3 s) = 36.875 kW
– In a time range of 3 s, the highest power is provided between t = 4 7 s.
The mean value is calculated for this range. The circumscribed area of
the curve represents the average power.
– Mean value
0over 3 s: P
gen,ave
= 12.5 kW
– Mean value 1over 3 s: P
gen,ave
= (61.25 kW ˘ 12.5 kW) × 0.5 =
24.375 kW