Bosch Rexroth Tightening System 350 - Calculation of Power Loss

82/641 Bosch Rexroth AG | Tightening Technology 3 608 878 300
System 350 | 3 608 878 300/2019-03
4.2.6 Calculation of power loss
The resulting losses depend on
• the compact system or modular system used, and the modules installed in the card rack field/system
box.
• Tightening case
The calculation for expected losses is as described below.
4.2.6.1 Power loss when idle
Calculation of power loss when idle:
P
G
= Total of power losses of all installed components when idle.
4.2.6.2 Losses during tightening
The power needed at the tightening position is calculated from the speed and the maximum torque:
.
A mean torque of 1 Nm and a resulting power demand of 6 W (at 55 min
–1
).
For pre-tightening:
For final tightening:
Approximately the same power is calculated for the power loss in the servo amplifier.
Table 4–14: Power consumption of the installed components
Module Static power consumption
Tightening spindle + LT35x or ErgoSpin +
LTU350/1
19W
CS351E-D (IL) 23W
1
1 Power loss in ready mode
CS351E-G (IL) 26W
1
/ 23W
2
2 23 W with activated screensaver
CS351E-D NK
3
3 Available as of version V2.200 of the Rexroth Tightening System 350
24W
CS351S-D (IL) 23W
1
CS351S-G (IL) 26W
1
/23W
2
CS351S-D NK
3
24W
BT356 incl. VM 48W
SB356 incl. VM 53W
Per KE 8W
Per SE 8W
Per IM 5 W
Example 2 card rack fields with a communication unit, 4 control units, and 8 tightening spindles + LT35x or
ErgoSpin + LTU350/1:
P
G
248W 8W 4++8W 8+ 19W 288 W==
PM2 n=
M2 n 200 NM 2
20
60s
----------
 419 W==
M2 n 400 NM 2
20
60s
----------
 838W==