On 9/7/2011 5:34 AM, andy pugh wrote: > On 7 September 2011 07:53, Peter Blodow<p.blo...@dreki.de> wrote: > > >>> Yes, but I can't find one. (or not one rated at 15A / 240V anyway) >>> > >> Andy, I have one here that will deliver this power easily. It used to >> power a hospital supply where all electrical gear must be floating. The >> only problem would be the shiping since it is very heavy. Where are you, >> anyway? >> > I am in the UK, and I just realised that I do have a transformer, on > fact I have been using it all along during the development phase, a > safety isolating transformer. > > It is interesting watching this conversation develop, as Pete and Dave > are both of the opinion that what I have is entirely conventional for > a servo drive. > > I have also just noticed that the transformer I rescued from the skip > at work (A 1160VA Siemens one) might work, if I can find a combination > of winding taps that gives 1:1. > > Thanks for the offer, though. > >
I setup and tested a two axes S120 Siemens Servo system last week - if you look at pages 33-35 you can see the basic structure of the drive system. http://www.automation.siemens.com/doconweb/pdf/SINAMICS_1008_E/GH3.pdf?p=1 As you can see - no transformers involved. The "Smart" infeed module (Servo DC power supply) can regenerate power back into the line to limit the DC bus voltage. I think the Smart module infeed requires the inductive filter. Other, non-regenerative power supplies that they offer do not. These are really nice drives but nothing about them is cheap. Dave ------------------------------------------------------------------------------ Using storage to extend the benefits of virtualization and iSCSI Virtualization increases hardware utilization and delivers a new level of agility. Learn what those decisions are and how to modernize your storage and backup environments for virtualization. http://www.accelacomm.com/jaw/sfnl/114/51434361/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
