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Supply a Sinamics with DC current?

10/6/2014 5:37 PM	Rate (0)
Osld13 Experienced Member Joined: 3/20/2012 Last visit: 1/16/2026 Posts: 120 Rating: (1)	Hi, Is it possible to supply a sinamics G120 (PM240 for example) with DC current instead of 3x400v? I explain: The power will come from Batteries. So it has to be convert...Any ideas? Tanks a lot.

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10/6/2014 9:07 PM	Rate (0)
max78 Regular Member Joined: 5/27/2009 Last visit: 12/18/2025 Posts: 7 Rating: (0)	In some G120 are present DC link terminals. I think that is possible to do something similar to: http://support.automation.siemens.com/WW/llisapi.dll?aktprim=4&lang=en&referer=%2fWW%2f&func=cslib.csinfo&siteid=cseus&groupid=4000003&extranet=standard&viewreg=WW&nodeid4=20229807&objaction=csopen Attachment MM4App_007_DC_link_coupling_en.pdf (369 Downloads)

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10/7/2014 9:20 AM	Rate (0)
Osld13 Experienced Member Joined: 3/20/2012 Last visit: 1/16/2026 Posts: 120 Rating: (1)	Hi Max78, Thanks for your answer, I know this method. It may be useful to avoid or to share braking resistor. The difficulty to supply the sinamics directly on itsDC bus is in providing the appropriate voltage. The easiest way would be to supply the sinamics in DC current on its 3x400v (or 1x230v) terminals, and go throught the rectifier...So the DC voltage regulation could work normally. However, i need to know the DC voltage acceptable on supply terminals...That is never specified in inverters technical spécifications. Regards.

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10/8/2014 10:22 PM	Rate (0)
zako_ Posts: 895 Rating: (67)	... you can connect to DCP and DCN directly at PM240 (here the precharging would be done automatically). But normally I would use SINAMICS S120 booksize motormodules - but then you have to use a precharging circuit.
zako_ Posts: 895 Rating: (67)	Last edited by: zako_ at: 10/8/2014 10:22 PM
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