Configuration
5.2 Procedure when engineering
S-1FT7 synchronous motors
Configuration Manual, 09/2018, A5E45099423B AA
111
3. Calculate the acceleration torque of the motor.
Add the load torque and the acceleration torque to obtain the maximum required torque.
4. Verify the maximum motor torque with the limiting characteristic curves of the motors.
The following criteria must be taken into account when selecting the motor:
– Compliance with the dynamic limits.
All speed-torque points of the load must be below the relevant limiting characteristic
curve.
– Compliance with the thermal limits.
At average speed, the effective motor torque must be below the S1 characteristic
curve (continuous operation) during the load.
You have defined a motor.
❒
Duty cycles with constant ON duration
For duty cycles with constant ON duration, there are specific requirements for the torque
characteristic curve as a function of the speed, for example:
M = constant, M ~ n
2
, M ~ n or P = constant.
Figure 5-2 S1 duty (continuous operation)
These drives typically operate at a specific operating point.
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