Glossary
1FT2 synchronous motors for SINAMICS S120
136 Configuration Manual, 03/2021, A5E50645584B AA
NDE
Non-drive end = Non-drive end of the motor
Static torque M0
Thermal torque limit when the motor is at a standstill corresponding to the motor thermal
class. M
0 is always ≥ the rated torque MN.
Stall current I0
Motor phase current to generate the particular static torque (M0 = kT • I0). Specification of the
RMS value of a sinusoidal current.
Thermal time constant Tth
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 JMot
Moment of inertia of rotating motor parts. JMot = without brake, JMot Br = with brake.
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