On Fri, 8 Feb 2013, andy pugh wrote: > Date: Fri, 8 Feb 2013 09:00:58 +0200 > From: andy pugh <bodge...@gmail.com> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Subject: Re: [Emc-users] Signal generator for induction heating > > On 8 February 2013 00:29, Sebastian Kuzminsky <s...@highlab.com> wrote: > >> Maybe a stepgen component in quadrature mode? That would let you easily >> control the frequency of the output signal. > > That would be 90 degrees phase-shift I think, so not quite right. > > siggen might be the way to go. I think there are bridge control chips > that handle the dead-time in hardware, and that might be a more > reliable approach. > > I think that the three-phase PWMgen on Mesa cards has complementary > signals, with deadband, that might be worth putting an oscilloscope > on. > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto
This sounds like an ideal application for an Arduino (or cheaper microprocessor) with an _isolated_ serial link to set the parameters. Many little Micros have PWM hardware that will generate non-overlapping push pull drive though it may be harder to find one that can adjust the frequency and duty cycle independently. > > ------------------------------------------------------------------------------ > Free Next-Gen Firewall Hardware Offer > Buy your Sophos next-gen firewall before the end March 2013 > and get the hardware for free! Learn more. > http://p.sf.net/sfu/sophos-d2d-feb > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! Learn more. http://p.sf.net/sfu/sophos-d2d-feb _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
