On 11 January 2012 14:11, Viesturs Lācis <viesturs.la...@gmail.com> wrote:
>> Yes. I would suggest opto-isolators between the IRAMS and the 5i23 or >> whatever, though. > > Are You saying that optoisolator will not disturb PWM signal? Somehow > I am convinced that it will... It shouldn't, much, if you have a fast enough one. > > BTW I was warned that there should be considered protection for the > board from overvoltages, coming from motors. Is that correct and how > is that usually implemented? Freewheeling diodes. You can see one across every power stage in the H-bridge. Effectively there is a 3-phase bridge-rectifier built into the H-bridge, and any voltages > bus voltage are shuttled into the bus caps. Those need to be big enough to absorb the current without pushing the voltage too high. > The first picture is so obvious that I even I understand, but I have > difficulties with the second picture - what should I look at? Well, it just shows that I added a huge heat-sink for the drive and rectifier. > Thank You for the offer! But then I have to get You a replacement, if > I blow it up... Yes, what my motorcycling friends call "Big boy's rules" (you crash it, you fix/replace it) -- 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
