SEW-Eurodrive MOVIMOT advanced DRN DBC Series User Manual

10
Project planning
MOVIMOT® advanced
Operating Instructions – MOVIMOT
®
advanced
228
10.3.3 Regenerative load capacity of the integrated braking resistor
The following diagram shows the load capacity per braking operation of the BW1 bra-
king resistor integrated in the drive unit as standard:
200
300
400
500
600
[J]
[1]
[2]
[3]
0
100
01050 100 200 500 1000
2000 3000 4000 5000 6000
[c/h]
25291390987
[1] Deceleration ramp 10s
[2] Deceleration ramp 4s
[3] Deceleration ramp 0.2s
c/h Cycles/hour
Calculation example
The known values are:
• Average braking power: 11.8W
• Deceleration ramp: 0.92s
• 6 brake applications per hour
Calculating the energy from the power of the deceleration ramp:
W P t W s J= × = × =11 8 0 92 10 9. . .
The specified deceleration ramp in seconds refers to a speed change of 3000min
−1
.
Calculation of the deceleration ramp for MOVIMOT
®
advanced:
3000 min
-1
5
0 min
-1
x 24.99
t
ab
0.92 s 2.4 s
x
32399244555
For the deceleration ramp of 2.4s, you can use deceleration ramp[3] (0.2s) in the
diagram.
Use the characteristic curve with the shorter deceleration ramp because a shorter de-
celeration ramp means more braking energy.
The diagram permits 310 J of braking energy for the 0.2 s deceleration ramp at
6cycles per hour. In this case, the required 10.9J can be dissipated via BW1.
25891936/EN – 05/2020

SEW-Eurodrive MOVIMOT advanced DRN DBC Series Specifications

General

Brand	SEW-Eurodrive
Model	MOVIMOT advanced DRN DBC Series
Category	DC Drives
Language	English