Dimensioning, 375 v, Brake chopper with switching threshold u – Lenze EMB9352−C User Manual
Page 77
Dimensioning
Calculate max. running time for brake chopper and brake resistor
l
77
EDBMB935X DE/EN/FR 13.0
5.2
Calculate max. running time for brake chopper and brake resistor
Brake chopper with switching threshold U
ch
= 375 V
I [A]
t [s]
on
0
0
0.5
1.5
2.5
1.0
2.0
3.0
35
25
45
5
10
30
20
40
(I ) 14
N
18
W
24
W
1
0
t
(18
on, max
W)
³
W
27
20
W
15
W
12
W
10
W
9
W
27
W (R
)
B,lim
9350br_014a
Fig. 1
Max. running time for brake chopper EMB 9352 and external brake resistors
Brake chopper with switching threshold U
ch
= 725/765 V
I [A]
t [s]
on
0
0
0.5
1.5
2.5
1.0
2.0
3.0
35
25
45
5
10
30
20
40
(I ) 14
N
18
W
39
W
33
W
27
W
24
W
22
W
47
W
1
0
t
(
on, max
33
W)
³
W
54
54
W (R
)
B,lim
9350br_014b
Fig. 2
Max. running time for brake chopper EMB 9352 and external brake resistors