Siemens 1FT7 Configuration Manual page 79

Effects of the temperature influence and parameter scatter on the characteristic
The torque-speed characteristics specified in the following chapter relate to the nominal
values at operating temperature (shown as characteristic 3 in the chart below).
Figure 4-6 Effect of scatter
NOTICE
The motor temperature results in a clear displacement of the voltage limiting characteristic
in the upper speed range. This must be taken into consideration during engineering
(especially for applications in which the cold motor has to produce maximum speeds) with
converter systems without field weakening.
1FT7 Synchronous Motors
Configuration Manual, (PFT7S) 01/2009, 6SN1197-0AD13-0BP2
Technical data and characteristic curves
4.1 Operating range and characteristics
79