Complex Movement - Lenze EMB9351-E Instructions De Mise En Service

5 Dimensioning
Dimensioning examples

Complex movement

5.4.3 Complex movement
A complex movement is to be braked (e.g. multiple drive axes).
Provided data:
U = 725 V
ƒ
DC
Power characteristic in generator mode:
ƒ
P [kW]
gen
65
60
55
50
45
40
35
30
25
20
15
10
5
Fig. 6 Power characteristic in generator mode
Data provided by the diagram:
Max. regenerative power: P
ƒ
Average regenerative power over 3 s: P
ƒ
–
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
–
Mean value 1over 3 s: P
–
24.375 kW
86
1 2 3 4
gen,max
= 12.5 kW
gen,ave
= (61.25 kW ˘ 12.5 kW) × 0.5 =
gen,ave
l
1
0
5 6 7
= 61.25 kW
(3 s) = 36.875 kW
gen,ave
EDBMB935X DE/EN/FR 12.0
8 9 t [s]
9350br_16d