Parallel Connection Of Motor Modules Chassis-2 - Siemens SINAMICS S120 Equipment Manual

Note
Derating factors for pulse frequencies in the range between two fixed values
For pulse frequencies in the range between the specified fixed values, the relevant derating
factors can be determined by linear interpolation.
Maximum output frequencies achieved by increasing the pulse frequency
The adjustable pulse frequencies - and therefore the output frequencies that can be
achieved with the factory-set current controller clock cycles - are listed below.
Table 7- 15 Maximum output frequencies achieved by increasing the pulse frequency
Current controller
clock cycle
T
I
400 µs
With the "High output frequencies" license, which can be ordered as option J01 on the CompactFlash card for
1)
SINAMICS S120, the maximum output frequency is increased up to 650 Hz.
Refer to the Low Voltage Configuration Manual for current controller clock cycles deviating
from the factory setting.
7.8.4

Parallel connection of Motor Modules Chassis-2

The following rules must be observed when connecting Motor Modules Chassis-2 in parallel:
● Up to 6 identical Motor Modules Chassis-2 can be connected in parallel.
● The parallel connection can only be implemented with one common Control Unit.
For more than 4 power units, these must be distributed as symmetrically as possible
between at least two DRIVE-CLiQ ports (e.g. 3x 2 Motor Modules Chassis-2 in series, or
a minimum of 2x 3 Motor Modules Chassis-2 in series).
● The motor supply cables must have the same length (symmetrical design).
● The Motor Modules Chassis-2 must be supplied from a shared DC link.
● For motors with a single winding system, supply cables with a minimum length or motor
reactors must be used. The cable lengths are listed in the following tables.
● For motors with multi-winding systems, carefully observe the notes provided in the Low
Voltage Configuration Manual.
● A derating factor of 5% must be taken into consideration, regardless of the number of
Motor Modules Chassis-2 connected in parallel.
Air-cooled chassis power units
Manual, 07/2019, 6SL3097-4AE00-0BP9
Adjustable pulse fre-
quencies
f
p
2.50 kHz
5.00 kHz
7.50 kHz
Maximum achievable output frequency f
V/f operating mode Vector operating mode
208 Hz
416 Hz
550 Hz
1)
Motor Modules Chassis-2
7.8 Technical data
A
Servo mode
208 Hz
300 Hz
300 Hz
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-
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