1FT2 synchronous motors for SINAMICS S120
Configuration Manual, 03/2021, A5E50645584B AA
71
Technical data and characteristics
6.1 Explanations
Permissible operating range
The permissible motor operating range is thermally, mechanically and electromagnetically
limited. The data provided in the motor data and characteristics are applicable for an ambient
temperature of 40 °C.
The losses in the motor (current-dependent losses, iron losses, friction losses) cause the
motor temperature to increase.
To maintain the temperature limits, the permissible S1 torque – starting from static torque M
0
– decreases as the speed increases.
Motor characteristics
Voltage limit characteristic curve
Figure 6-1 Torque characteristic
S1 characteristic
The S1 characteristic ① shows the limits of the permissible temperature range for continuous
operation according to the specified temperature class of the motor.
The average value of the output torque must lie below the S1 characteristic.
You can find additional information in Chapter "Configuration (Page 57)".
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