Lenze EMB9352−C Manual de usuario Pagina 83

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Dimensioning
Dimensioning examples
Translatory movement
5
83
EDBMB935X DE/EN/FR 13.0
Step 1: Calculate brake resistance
R
B
+
U
DC
2
P
gen,max
+
(725V)
2
55kW
+ 9.55W
Step 2: Determine the number of brake resistors
Two brake resistors are selected with 18 W each which are connected in parallel.
ƒ Please observe the rated power when dimensioning the brake resistors. It
results from the average braking power of a machine cycle.
Step 3: Calculate the number of brake choppers per brake resistor
N
Brm
+
P
gen,ave
(3s)
N
R
@ P
N
(U
ch
)
+
34.375kW
2 @ 10kW
+ 1.72 å 2
Every one of the two brake resistors requires two brake choppers each.
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