Re: [CAD_CAM_EDM_DRO] Re: steppers

jmkasunich wrote:

> Series has 4x the inductance of single winding, but parallel
> has the same inductance as single. Think of parallel as if
> it was a bifilar (sp?) winding.

Ah, right, it is, indeed, a bifilar winding, so that unipolar drives
can energize all the poles with just one winding.

> Parallel has lower copper loss due the the lower DC

> resistance, but the inductance is the same.
>
> That still means that single or parallel is 4 times faster than
> series, and 4x is nothing to sneeze at. It's just not 16x faster.

Thanks for the correction. Yes, a 4:1 loss of speed would be a radical
drop in performance in most systems.

Jon