Dimensioning For S1 Duty For Naturally Cooled Systems - Siemens simodrive 611 Configuration Manual

Planetary Gearbox
Selecting/dimension gearboxes and important quantities
Notice
Switching cycles can also be superimposed vibration! The supplementary factor (f
not sufficient when dimensioning the gearbox and gearboxes may fail.
The complete system should be optimized so that the higher-level vibration is minimized.
Fig. 5-1
The load torque and the required traversing velocity define the gearbox drive-out torque, the
drive-out speed and therefore the drive-out power.
The required drive power is calculated from this:
P
out
5.1.3

Dimensioning for S1 duty for naturally cooled systems

The gearbox itself generates heat due to friction and acts as a thermal barrier preventing heat
from being dissipated through the motor flange. This is the reason that the torque must be
reduced for S1 duty.
The required motor torque is calculated as follows:
M
M
V
a
b
n
mot
k
T
R
ph.
M
out
i
η
G
P
mot
P
out
M
mot
5-2
Dimensioning the gearbox
[W] = P η = (π/30)
mot •
G
M
2 2
= ( + M ) M
-
• i
Calculated "torque loss"
π/3 for 1FT6/1FK
0.5 weighting factor for gearbox losses (without dimensions)
Motor speed [RPM]
Torque constant [Nm/A]
Motor phase resistance when warm [Ω] = 1.4 R
Gearbox drive-out torque [Nm]
Gearbox ratio (i>1)
Gearbox efficiency
Motor power [W]
Gearbox drive-out power [W]
Motor torque [Nm]
M [Nm] n [RPM]
• •
mot mot
n
(
M = • a • b 1
-
60
motors supplied with sinusoidal current
Configuration Manual, (PFT6), 10.2005 Edition, 6SN1197-0AD02-0BP1
η
•
G
2
k
)
•
R
(list)
ph.
1FT6 Synchronous Motors
) is then
2