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 M
N
Thermally permissible continuous torque in S1 duty at the rated motor speed.
Rated speed n
N
The characteristic speed range for the motor is defined in the speed-torque diagram by the
rated speed.
Rated current I
N
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 x
D
Factor for power derating with which static torque M
0
of a motor is reduced as a function of
the installation altitude and the ambient temperature.
Torque constant k
T
(value for a 100 K average winding temperature rise)
Quotient obtained from the static torque and stall current.
Calculation:
k
T
= M
0, 100 K
/ I
0, 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.
