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Siemens D 21.4 · 2017
SINAMICS S120 drive system
Blocksize format
Output reactors for blocksize format
7
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Overview
Output reactor for PM240-2 Power Modules, frame size FSA
Output reactors reduce the rate of voltage rise (
dv/dt
) and the
height of the current peaks, and enable longer motor cables to
be connected.
Owing to the high rates of voltage rise of the fast-switching
IGBTs, the capacitance of long motor cables reverses polarity
very quickly with every switching operation in the inverter. As a
result, the inverter is loaded with additional current peaks of
substantial magnitude.
Output reactors reduce the magnitude of these additional peaks
because the cable capacitance reverses polarity more slowly
across the reactor inductance, thereby attenuating the ampli-
tudes of the current peaks.
When using output reactors, the following should be observed:
•
Max. permissible output frequency 150 Hz
•
Max. permissible pulse frequency 4 kHz
•
The output reactor must be installed as close as possible to
the Power Module
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Integration
Output reactors that are optionally available depending on the Power Module used
The following load-side power components are optionally available in the appropriate frames sizes for the Power Modules:
S = Lateral mounting
–
= Not possible
Frame size
FSA
FSB
FSC
FSD
FSE
FSF
PM240-2 Power Module with integrated braking chopper
Available frame sizes
• 200 V versions
• 400 V versions
• 690 V versions
–
–
–
Load-side power components
Output reactor
S
S
S
S
S
S
© Siemens AG 2017