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Siemens SINAMICS S120 Configuration Manual Page 51

Synchronous motors.
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Maximum converter current I
RMS converter output current (per phase) that can be supplied temporarily by
the recommended motor module
Maximum torque (limited by converter) M
The maximum torque that can be applied (temporarily) for operation on the recommended
motor module.
Typical M/I characteristic
The torque can be calculated linearly from the current but is subject to conditions (saturation
effects, etc.).
The left characteristic curve is regarded as the "best case", and the right characteristic curve
as the "worst case".
Figure 4-6
Braking resistance R
R
opt
external to the motor winding for the armature short-circuit braking function.
Braking torque M
b, opt
M
b, opt
the upstream braking resistance R
Synchronous Motors 1FK7
Configuration Manual, (PFK7S), Edition 12.2006, 6SN1197-0AD16-0BP1
max Inv
max Inv
Torque-current characteristic curve for self-cooled motors
opt
corresponds to the optimum resistance value per phase that is switched in series
corresponds to the average, optimum braking torque that is achieved through
.
opt
Electrical data
4.4 Definitions
51

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