Siemens SIMOTICS S-1FK7 - Glossary

1FK7 G2 synchronous motors
Operating Instructions, 05/2021, A5E50907562B AA
129
Glossary
B
2D code
Data Matrix code for reading out the motor data. The code is defined in ISO/IEC 16022.
Rated torque MN
Thermally permissible continuous torque in S1 duty at the rated motor speed.
Rated speed nN
The characteristic speed range for the motor is defined in the speed-torque diagram by the
rated speed.
Rated current IN
RMS motor phase current for generating the particular rated torque. Specification of the RMS
value of a sinusoidal current.
DE
Drive end = Drive end of the motor
Derating factor xD
Factor for power derating with which static torque M0 of a motor is reduced as a function of
the installation altitude and the ambient temperature.
Torque constant kT (value for a 100 K average winding temperature rise)
Quotient obtained from the static torque and stall current.
Calculation:
kT = M0, 100 K / I0, 100 K
The constant applies up to approx. 2 ∙ M
0, 60 K
in the case of self-cooled
motors
Note
This constant is not applicable when configuring the necessary rated and acceleration
currents (motor losses!).
The steady-state load and the frictional torques must also be included in the calculation.