Siemens SIMOTICS S-1FK2 - Page 161

Maximum permissible speed at converter n
max conv
The maximum permissible operating speed for operation at a converter is n
max conv
(e.g. limited
by withstand voltage, maximum frequency).
NDE
Non-drive end = Non-drive end of the motor
Static torque M
0
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
.
Stall current I
0
Motor phase current to generate the particular stall torque (M
0
= k
T
• I
0
). Speci󹪝cation of the RMS
value of a sinusoidal current.
Thermal time constant T
th
De󹪝nes 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 󹪝nal temperature
after T
th
.
Moment of inertia J
Mot
Moment of inertia of rotating motor parts. J
Mot
= without brake, J
MotBr
= with brake.
Glossary
1FK2 Synchronous Motors for SINAMICS S120
Con󹪝guration Manual, 02/2022, A5E46927724B AD 159