Glossary
1FK2 synchronous motors for SINAMICS S120
118 Configuration Manual, 06/2019, A5E46927724B AB
Non-drive end = Non-drive end of the motor
Thermal torque limit when the motor is at a standstill corresponding to the motor thermal
class. M
0
is always ≥ the rated torque M
N
.
Motor phase current to generate the particular stall torque (M
0
= k
T
• I
0
). Specification of the
RMS value of a sinusoidal current.
Thermal time constant T
th
Defines the increase in the motor frame temperature when the motor load is suddenly
increased (step function) to the permissible S1 torque. The motor has reached 63% of its
final temperature after T
th
.
Moment of inertia of rotating motor parts. J
Mot
= without brake, J
Mot Br
= with brake.
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