Calculation Of The Required Infeed - Siemens SIMOTICS T-1FW6 Configuration Manual

NOTICE
Damaged main insulation
In systems where direct drives are used on controlled infeeds, electrical oscillations can occur
with respect to ground potential. These oscillations are, among other things, influenced by:
• The lengths of the cables
• The rating of the infeed/regenerative feedback module
• The type of infeed/regenerative feedback module (particularly when an HFD commutating
• The number of axes
• The size of the motor
• The winding design of the motor
• The type of line supply
• The place of installation
The oscillations lead to increased voltage loads and may damage the main insulation!
• To dampen the oscillations we recommend the use of the associated Active Interface
Note
The corresponding Active Interface Module or the appropriate HFD line reactor must be used to
operate the Active Line Module controlled infeed unit.
6.2.10

Calculation of the required infeed

Dimensioning the Active Infeed
Use the drive's power balance to dimension the Active Infeed.
The first important quantity to know is the mechanical power P
motor shaft. Based on this shaft output, the electrical active power P
supply system can be determined by adding the power loss of the motor P
of the Motor Module P
power P
P = P
Line
The active power to be drawn from the power system depends on the line voltage U
line current I
P = √3 • U
Line
This is used to calculate the required line current I
1FW6 Built-in torque motors
Configuration Manual, 09/2022, A5E52220645B AA
reactor is already present)
Module or an HFD reactor with damping resistor. Review the documentation of the drive
system being used for details. If you have any questions, please contact your local sales
partner.
V MoMo
:
mech
+ P + P + P
mech V Mot V MoMo
and the line-side power factor cosφ
Line
• I • cosφ
Line Line
and the power loss of the Active Infeed P
.
V AI
.
Line
Line
6.2 Configuring workflow
to be produced on the
mech
to be drawn from the
Line
V Mot
to the mechanical
V AI
as defined by the relation
Line
of the Active Infeed as follows:
Configuration
, the power loss
, the
Line
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