Lenze EMB9352−C - Manual (Page 84)

Dimensioning
Dimensioning examples
Vertical movement
5
l
84 EDBMB935X DE/EN/FR 13.0
5.4.2 Vertical movement
A vertical movement is to be braked (e.g. lowering a hoist).
Provided data:
ƒ U
DC
= 725 V
ƒ Power characteristic in generator mode:
1 2 3 4 5 6 t [s]
2
4
6
8
10
12
P gen [kW]
0
1
9350br_16c
Fig. 5 Power characteristic in generator mode
Data provided by the diagram:
ƒ Max. regenerative power: P
gen,max
= 11 kW
ƒ Average regenerative power over 3 s: P
gen,ave
(3 s) = 9.33 kW
– In a time range of 3 s, the highest power is provided between t = 2 5 s.
The mean value is calculated for this range. The circumscribed area of
the curve represents the average power.
– Mean value 0for 3 s: P
gen,ave
= 9 kW
– Mean value 1for 1 s: P
gen,ave
= (11 kW ˘ 9 kW) × 0.5 / 3 s = 0.33 kW