It might simply be because resolvers are analog which considered to be old technology. It is useful to have some extra resolution above the accuracy for the control loop and I think resolvers usually have higher resolution.
I read many times digital control loops are faster but quite a lot of digital control loops are a lot slower than the cheapest available operational operational. On Sun, 1 Feb 2015 17:49:41 +0000 andy pugh <[email protected]> wrote: > On 1 February 2015 at 17:05, Kirk Wallace <[email protected]> wrote: > > I know very little about resolvers, but I think it means that resolvers > > are analog so one needs to determine what the 100% and 0% signal values > > are, and values in between (to deal with linearity) to convert to data. > > The reader takes the ratio of the sin and cos voltages, so the > absolute voltage is vaguely irrelevant. > > I think what I am saying is that the tendency of folk to immediately > remove a $1000 resolver and fit a $100 encoder when doing a retrofit > might be a mistake. > > -- > atp > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto > > ------------------------------------------------------------------------------ > Dive into the World of Parallel Programming. The Go Parallel Website, > sponsored by Intel and developed in partnership with Slashdot Media, is your > hub for all things parallel software development, from weekly thought > leadership blogs to news, videos, case studies, tutorials and more. Take a > look and join the conversation now. http://goparallel.sourceforge.net/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
