Checking The Moments Of Inertia; Selecting The Drive System Components For The Power Connection - Siemens SIMOTICS T-1FW6 Configuration Manual

Configuration
6.2 Configuring workflow
• Field weakening operation
If an operating point in range C is required, then the motor must be operated in the field
weakening range (see the following diagram).
Advantage: Significantly higher speeds are possible.
Disadvantage: The torques available are very low.
A lower current is required, refer to the description for field weakening operation in Chapter
"Technical data and characteristics"
Figure 6-9
6.2.8

Checking the moments of inertia

Once a suitable motor has been selected, the moment of inertia of the rotating mass on the axis
has been determined. This value can be used to check the assumptions made regarding the duty
cycle.
Recalculating the duty cycle
If the moment of inertia initially assumed deviates significantly from the actual moment of
inertia, the duty cycle may have to be recalculated.
6.2.9

Selecting the drive system components for the power connection

The drive system components for the power connection are selected on the basis of the peak and
continuous currents that occur in the duty cycle. If more than one motor is operated in parallel
on a single power unit, the total values of the peak and continuous currents must be taken into
account.
106
Requirement: Field weakening
1FW6 Built-in torque motors
Configuration Manual, 09/2022, A5E52220645B AA