Lust CDA3000 - Page 170

Engineering Guide CDA3000
3-87
3 Selection of inverter module
DE
EN
1
2
3
4
5
6
7
A
Calculation of effective braking power
Figure 3.41 Effective braking power
P
S
= Peak braking power
P
D
= Continuous braking power
T = Sampling time (work cycle)
t1 = 0.2 s
t2 = 3 s
t3 = 0.2 s
t4 = 0.2 s
t5 = 3 s
t6 = 0.2 s
T = 8.4 s
The continuous braking power of the braking resistor must be > P
eff
. The
sampling time T must be < 150 s.
V
t
[m/s]
t1
t2
t3
t4
t5 t6
T
1580
998
0
P
[W]
P
S1
P
S2
t
t
3
t
6
0
P
eff
P
s1
2
t
3
P
s2
2
t
6
⋅+⋅
T
-------------------------------------------=