Re: [CAD_CAM_EDM_DRO] Unipolar/Bipolar Parallel/Series?!?!?

From: <JanRwl@...>

> > Heyyyyyyy...I think I'm finally starting to get this stuff... So, I
> > *don't* have a four phase bipolar motor. I have a two phase motor that

can

> > be configured as either
> > a heavy duty bipolar one, or as a versatile unipolar one. Izzat

correct?

> >
> Leave out the one word, "versatile", and I would agree with your

assessment.

>
> > So figuring this is correct, and given the ratings of my motors (3.5A
> > uni/5.0A bi),
> > The 3.5A rating is for using them series wired and the 5.0A rating is

using

> > them parallel wired. Is that correct?
>
> Yes, but know: The 3.5 amp is NOT intended to flow through BOTH halves of
> the center-tapped winding at one time! Only "alternately". Why 5.0 A and
> not 2*3.5A? The dissipation of the "whole coil" is the concern, not the
> "total V-A at any instant".
>
> > So this kinda answers one of my other questions. I could go ahead and

put a

> >
> Yes, at least in this example. It is almost always "safe" to add a

capacitor

> of appropriate "working voltage rating" across D.C. supply-terminals
> "anywhere". There are instances, however, when such a capacitor,

especially

> if very large in terms of farads, can so-horribly-load the power-supply

upon

> turn-on, that it can do damage, or impair longevity, but not in this case,
> anyway!

Thanks for clearing those questions up, Jan~!

Weyland