On Mon, 28 Nov 2011, andy pugh wrote: > Date: Mon, 28 Nov 2011 18:03:19 +0000 > From: andy pugh <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Subject: Re: [Emc-users] Interesting motor > > On 28 November 2011 16:32, andy pugh <[email protected]> wrote: > >> I suspect it just means that the current return is in the opposite >> direction, but through the adjacent, opposite polarity, magnet. >> >> But then, if you do that, do you need commutation at all? > > And the answer is, "of course", because if both legs of the loop are > adjacent to the opposite polarity of magnet, then the force reverses.
I think its just an ironless stator PMSM, same drive as a normal BLDC _except_ these often have very low inductance so need high drive PWM frequencies/current control loop bandwidth. Also looks like a lot of poles so high frequency sine/space vector as well. > > -- > atp > The idea that there is no such thing as objective truth is, quite simply, > wrong. > > ------------------------------------------------------------------------------ > All the data continuously generated in your IT infrastructure > contains a definitive record of customers, application performance, > security threats, fraudulent activity, and more. Splunk takes this > data and makes sense of it. IT sense. And common sense. > http://p.sf.net/sfu/splunk-novd2d > _______________________________________________ > Emc-users mailing list > [email protected] > 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. ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
