[Lowfer] Triflier Core Winding

[Peter Barick]

Ed and others,

No luck on my quest. I usually use Lycos for Web searching and this
time I used Google. Yes, I got many returns on the "trifilar" subject
query, (ha, some dead, 403s) but of those I looked at, all were
"traditional" appearing as what I'll call multi windings, series
connected.

I think Ed recognizes the issue in part when he states, "The three
windings have separate connections or any combination of connections."
Hence, one "combination" is when all starting turns (wires) are
connected together as are all ending turns. Then is this a "multi-wire
single winding"? 

Now, back to the Web search, how can one formulate a Web search
criteria for the above? What are the keys? Trifilar and ... ? Is there a
term for this connection scheme?

Thank you once again,
Vogue la galere,
Peter
---------------------------------------------------------------------------
>>> evp@pacbell.net 04/10/02 06:15PM >>>
Peter Barick wrote:
> 
> Loafers,
> 
> I'm trying in vain to find information on the practice of "trifiler"
> winding, as used on a ferrite core.
> 
> Why is it used? It seems to be a similar in style to Litz wire, the
> forming of a twisted 3-wire conductor and wrapping it on the core,
where
> all like ends are tied together. 

	Trifilar windings are used widely to reduce the leakage
inductance of
transformers (same as increasing the coupling factor).  The three
windings have separate connections or any combination of connections. 
Other common variations are the bifilar winding (most common) and the
quadrifilar winding.

	Do a Google search on trifilar and I'll bet you'll get more
information
than you want.  Most EE or Electronic Engineering handbooks will have
the information as well.

> Peter

Ed
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