I don't think you can use the Fairchild part to drive a servo motor with sinusoidal commutation, because it uses a PLL to compute the phase angle. This implies they expect it to be continually running, and not changing direction.
Neil On Tue, Jan 18, 2011 at 7:22 PM, Jon Elson <el...@pico-systems.com> wrote: > Kirk Wallace wrote: > > Has anyone used one of these: > > http://www.fairchildsemi.com/ds/FC/FCM8201.pdf > > > > > OH MY! Under $4 at Digi-Key. This looks like it might make a fairly > simple way to drive a motor in sinusoidal mode, with a PWM signal providing > a torque command. Quite a FIND, thanks! > > On the other hand, the data sheet is REALLY sparse about how the thing > really > works in "stand alone" mode, how the PWM input really controls the output > pulse widths, etc. I wonder if there is another document that details > how the > chip really works? > > Jon > > > ------------------------------------------------------------------------------ > Protect Your Site and Customers from Malware Attacks > Learn about various malware tactics and how to avoid them. Understand > malware threats, the impact they can have on your business, and how you > can protect your company and customers by using code signing. > http://p.sf.net/sfu/oracle-sfdevnl > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- http://www.pixpopuli.com ------------------------------------------------------------------------------ Protect Your Site and Customers from Malware Attacks Learn about various malware tactics and how to avoid them. Understand malware threats, the impact they can have on your business, and how you can protect your company and customers by using code signing. http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
