On 11 January 2012 11:58, Viesturs Lācis <viesturs.la...@gmail.com> wrote:
> http://docs-europe.electrocomponents.com/webdocs/0dca/0900766b80dca34c.pdf > On page nr 9 I found a scheme of "Typical application connection". > Do I understand correctly that anything within the blue frame already > is on that board? Yes. I would suggest opto-isolators between the IRAMS and the 5i23 or whatever, though. > Anyone willing to consult me? I made mine do this: https://picasaweb.google.com/108164504656404380542/Gibbs#5469721364857131746 So might not be the ideal consultant Mk2 had heatsinking, but I think that died too: https://picasaweb.google.com/108164504656404380542/Gibbs#5471910659108799346 I can't recally if it was just the surge-limiter that went, or if it died completely when I was trying to use it as a VFD with an ordinary induction motor. > > EMF constant * RPM + Peak current * Terminal resistance = Voltage Ah, yes, I forgot to consider the ohmic losses, 1500rom is a bit pedestrian. > Any chance You might do some basic tests in a nearest future? That > would give me some idea, if 8i20s might be used for the task. I am a bit puzzled. The 8i20 is a 2.2kW drive, with up to 30A. Pete is concerned that 1A (and currents from there to zero) are a bit small for the internal calculations. However, a 750W motor is good proportion of the power rating, if not the current rating. Matt Shaver is running a 1kW motor with a max current of 7.5A on an 8i20, though that is a spindle application, so might not be directly comparable. I am going to be away from all computers for 6 weeks at the end of March, if you are not sorted out by then then I might be able to loan you one of my 8i20s. (sourceforge blocked this message the first time I sent it, so I have cc-ed Visteurs directly. I don't know if this will get through to the list) -- atp The idea that there is no such thing as objective truth is, quite simply, wrong. ------------------------------------------------------------------------------ Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
