Andy I wanted to get back to this because I am looking at another amp that uses sinusoidal drive. It is a copley 7425 AC drive: http://www.copleycontrols.com/motion/pdf/7225ac.pdf What they are doing is using two analog +-10v to represent the current command for the u and v and then they are synthesizing w either 120 or 90 degrees apart. This seems pretty doable assuming using something like the 5i20 than a 7i33 card. The obvious benefits are that I get the voltages I need, I get line power so I just need a line filter which will definitely offset the cost of the extra card. but it looks maybe a bit harder to set up. What do you think?
--- On Sat, 4/23/11, andy pugh <[email protected]> wrote: > From: andy pugh <[email protected]> > Subject: Re: [Emc-users] Motion control cards > To: [email protected], "Enhanced Machine Controller (EMC)" > <[email protected]> > Cc: "Mark Wendt (Contractor)" <[email protected]> > Date: Saturday, April 23, 2011, 9:57 AM > On 23 April 2011 16:14, Robert Pabon > <[email protected]> > wrote: > > > If I choose an amp which requires a sinusoidal > signal, I am not sure what to do since I haven't shopped for > an available > > The only amp I know of which requires a sinusoidal input > (or three > PWMs) is the Mesa 7i39. > However, the bldc component has three (or six) PWM > amplitudes as one > of the output options. > Hall and Encoder input to 3xPWM output is one of the > better-tested > configurations, actually. > > -- > atp > "Torque wrenches are for the obedience of fools and the > guidance of wise men" > ------------------------------------------------------------------------------ Fulfilling the Lean Software Promise Lean software platforms are now widely adopted and the benefits have been demonstrated beyond question. Learn why your peers are replacing JEE containers with lightweight application servers - and what you can gain from the move. http://p.sf.net/sfu/vmware-sfemails _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
