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

5 Dimensioning
Dimensioning examples

Vertical movement

5.4.2 Vertical movement
A vertical movement is to be braked (e.g. lowering a hoist).
Provided data:
U = 725 V
ƒ
DC
Power characteristic in generator mode:
ƒ
P [kW]
gen
12
10
8
6
4
2
Fig. 5 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 = 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
–
Mean value 1for 1 s: P
–
84
0
1 2 3 4
gen,max
= 9 kW
gen,ave
= (11 kW ˘ 9 kW) × 0.5 / 3 s = 0.33 kW
gen,ave
l
1
5 6 t [s]
= 11 kW
(3 s) = 9.33 kW
gen,ave
EDBMB935X DE/EN/FR 12.0
9350br_16c