Calculation Of The Required Infeed - Siemens SIMOTICS L-1FN3 Configuration Manual

Configuration
5.2 Configuring workflow
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
• 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.
5.2.9

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
on this power value, it is possible to work out the electrical active power P
from the power system by adding the power loss of the motor P
Motor Module P
P
MECH
P
Netz
The active power to be drawn from the power system depends on the line voltage U
line current I
P
Netz
120
commutating reactor is already present)
Module or an HFD reactor with damping resistor. For specific details, refer to the
documentation of the drive system being used or contact your local Siemens office.
and the power loss of the Active Infeed P
V MoMo
:
= P + P + P
mech V Mot V MoMo
, and the line-side power factor cosφ
Netz
= √3 • U • I • cosφ
Netz Netz
+ P .
V AI
.
Netz
Configuration Manual, 10/2018, 6SN1197-0AB86-0BP2
to be produced. Based
MECH
Netz
, the power loss of the
V Mot
to the mechanical power
V AI
as defined by the relation
Netz
to be drawn
, the
Netz
1FN3 linear motors