If you use PWM, doesn't that make it an AC motor? I suppose unless you are just modulating half of the polarity, then you could still consider it DC. I am not immediately familiar with the bldc components, so if this is just my ignorance speaking, then ignore it.
Brian On Tue, Nov 9, 2010 at 7:04 AM, Andy Pugh <a...@andypugh.fsnet.co.uk> wrote: > I am planning to merge the bldc-hall and bldc-sine components into one > generic driver. The idea is that you will tell the driver what > feedback mechanisms you have (or, actually, which ones you wish to > use) and the driver will attempt to produce the best drive mode it can > from that feedback. > > I have tabulated the options here: > https://spreadsheets.google.com/ccc?key=0AhjJW1-T6n7CdG5xeE10X1lLa042YmdWX2pvV00ydGc&hl=en#gid=0 > > I am thinking that further bitfield-options could choose between > 3-output (U, V, W) and 6-output (U, /U, V, /V, W, /W) PWM amplitude > values or 3-wire and 6-wire bit level values. > It might even be possible to have base-thread functions in the latter > modes that perform PWM on the bit values. However I suspect that that > would struggle to manage more than a few kHz and so might not be very > useful, especially as I can't think of many situations where you would > use software PWM and have 6 wires available. > > Any thoughts? One thing I am considering is a bit-field to indicate if > the driver should use the user-supplied encoder offset, or should > measure it itself. There is a definite ambiguity about the Type12 > arrangement in that table without that information. > > -- > atp > > ------------------------------------------------------------------------------ > The Next 800 Companies to Lead America's Growth: New Video Whitepaper > David G. Thomson, author of the best-selling book "Blueprint to a > Billion" shares his insights and actions to help propel your > business during the next growth cycle. Listen Now! > http://p.sf.net/sfu/SAP-dev2dev > _______________________________________________ > Emc-developers mailing list > Emc-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-developers > ------------------------------------------------------------------------------ The Next 800 Companies to Lead America's Growth: New Video Whitepaper David G. Thomson, author of the best-selling book "Blueprint to a Billion" shares his insights and actions to help propel your business during the next growth cycle. Listen Now! http://p.sf.net/sfu/SAP-dev2dev _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
