1FT2 synchronous motors for SINAMICS S120
Configuration Manual, 03/2021, A5E50645584B AA
135
Glossary
10
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
Maximum torque M
max
Torque that is generated at the maximum permissible current. The maximum torque is briefly
available for high-speed operations (dynamic response to quickly changing loads).
The maximum torque is limited by the closed-loop control parameters.
Maximum current I
max
This current limit is only determined by the magnetic circuit. Even if this is briefly exceeded, it
can result in an irreversible de-magnetization of the magnetic material. Specification of the
RMS value of a sinusoidal current.
Maximum speed n
max
The maximum mechanically permissible operating speed n
max
is the lesser of the maximum
mechanically permissible speed and the maximum permissible speed at the converter.
Maximum permissible speed (at converter) n
max Inv
The maximum permissible operating speed for operation at a converter is n
max Inv
(e.g. limited
by withstand voltage, maximum frequency).
