On 25 April 2010 18:28, RogerN <re...@wildblue.net> wrote: > In your opinion, do you think the Arduino would work to use as an amplifier > by using 1 resolver and adding 3 phases of PWM to drive 3 half H-Bridges?
Possibly, and it is something I have been thinking of looking in to. I am not sure if it is possible to persuade the Arduino PWM drivers to do the complementary low-side driver signals that I think are needed. It might be easier to write a 3-phase PWM comp module for EMC2 to create the driver signals. There is already one in the Hostmot2 software, but it is not currently supported in the EMC2 has drivers. (That might change) What is possible (and I have a version of the Resolver code that already does it) is to synthesise Hall sensor signals to pass to a generic BLDC motor driver. However most BLDC drivers don't handle the voltages that servos are designed to run at. I have made my servos rotate with a generic BLDC driver, but only slowly (lack of voltage / high rotor inductance I think) and only briefly (something odd about the drives, they trip out on overload even with small BLDC motors well within their stated parameters) I am thinking of buying one of these for further experimentation: http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=6880732 Mainly as the package includes shoot-through protection and I don't trust my coding skills. -- atp ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
