Siemens SIMATIC SIMOSTEP 1FL3041 Functional Description page 50

9 SIMOSTEP specifications
Torque
characteristics
9-6
The torque of a motor depends on the speed of the rotor and on the
motor phase current set on the power controller.
For the torque characteristic curve measurements, 1000 steps per
revolution and the appropriate nominal motor current were set on the FM-
STEPDRIVE power controller *. The characteristic curves were measured
at the nominal values of the supply voltages 115 V/50 Hz and 230 V/50
Hz.
The following formula reflects the relationship between the control
frequency f s , the number of steps z and the speed n of the motor:
n = 1/z · f s · 60 r.p.m.
The following characteristics are illustrated in each case:
Slew curve
Start/stop curve (start frequency as a function of the load torque)
Load inertia curve
Figure 9-6 SIMOSTEP 1FL3041 torque characteristics
* For 500/5000/10000 numbers of steps, the f s scale must be multiplied wit the
factors 0.5/5/10, respectively.
© Siemens AG 1998 All Rights Reserved
FM-STEPDRIVE/SIMOSTEP (FB)
02.05