I'm not sure I follow. What I was referring to was something like this amp:
http://www.a-m-c.com/download/datasheet/sx25a20.pdf Which requires two sine waves with a 120 degree phase shift. The phase angle corresponds to motor angle and the amplitude corresponds to torque. My understanding of PWM is that it is a square wave and you are using the the width of that wave to for control. I am not sure how that relates to the sine wave or how I would get from the 5I22 into the AMC amp above. I would need some sort of signal converter to convert the PWM to a sine wave in order to get something useable or is that functionally possible? --- On Sat, 4/23/11, andy pugh <bodge...@gmail.com> wrote: > From: andy pugh <bodge...@gmail.com> > Subject: Re: [Emc-users] Motion control cards > To: robertpa...@corseusa.com, "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > Cc: "Mark Wendt (Contractor)" <mark.we...@nrl.navy.mil> > Date: Saturday, April 23, 2011, 9:57 AM > On 23 April 2011 16:14, Robert Pabon > <robertpa...@corseusa.com> > 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
