Siemens SIMOTICS-T 1FW68 Engineering Manual page 85

Note
Depending on the application, e.g. for a horizontal axis, when determining the required
torque, the gravitational torque M
M
m
The gravitational torque reaches its highest level for
M = m • g • r
g
m: moved mass
g: acceleration due to gravity
r: radius of the circular path
In addition to the peak torque M
a crucial factor when dimensioning the motor. The continuous torque M
for the temperature rise in the motor can be derived from the motor torque-time diagram by
means of quadratic averaging and must not exceed the rated torque M
If the individual torques are constant in each section, the integral can be simplified to create
a totals formula (see also the following diagram).
Figure 5-4
1FW68 radial segment motors
Configuration Manual, 04/2017, 6SN1197-0AE02-0BP1
= M + M + M + M
a b r g
Motor torque-time diagram
must also be taken into account.
g
, the required continuous torque M
mMAX
Configuring
5.1 Configuring workflow
of the motor is also
eff
mainly responsible
eff
.
N
85