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

In a message dated 23-Sep-01 15:27:20 Central Daylight Time,
weyland@... writes:

>
> 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!





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