Siemens SIMOTICS-T 1FW68 Engineering Manual page 88

Configuring
5.1 Configuring workflow
Determining the motor torque-speed diagram
If a motor torque-speed diagram is not available, the relevant values can be determined with
sufficient accuracy using the specifications for the maximum torque M
M , and the associated speeds n
N
This diagram must be compared with the motor torque-time diagram and the speed-time
diagram (see diagram below). To do so, it is normally sufficient to locate the critical points in
the torque-time diagram at which the maximum speed n
torque. For these points, the motor torque (in this example: M
torque-time diagram and checked to determine whether it lies below the characteristic in the
motor torque-speed diagram.
Figure 5-6
88
MAX,MMAX
Motor torque-time diagram and associated speed-time diagram
and n as shown in "Motor torque-speed diagram".
N
is exceeded at the peak
MAX,MMAX
) can be read from the motor
1
Configuration Manual, 04/2017, 6SN1197-0AE02-0BP1
, the rated torque
MAX
1FW68 radial segment motors