Technical data and characteristics
6
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, no-load 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
5PSRVF.JO/N
.PUPSTQFFEOJOSNJO
4
.NBY
.NBYJOW
ONBYJOW
1 S1 characteristic 4 n
max inv
line
2 M
max
characteristic 5 Voltage limit characteristic curve
3 M
max inv
characteris‐
tic
Figure 6-1 Torque characteristic 1FK2
S1 characteristic
The S1 characteristic ① shows the limits of the permissible temperature range for continuous
operation according to the specied temperature class of the motor.
The average value of the output torque must lie below the S1 characteristic.
1FK2 Synchronous Motors for SINAMICS S120
Conguration Manual, 02/2022, A5E46927724B AD 81
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