[Lowfer] Triflier Core Winding

[Ed Phillips]

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.

> This technique is new for me. I've seen
> it where the three comprised both input and output windings, however.
> 
> I don't think it's to increase current cap., as the ref. I have is for
> receiving apps. Then could it be for flexibility for winging on a small
> core? Don't think that's it. Stumped.
> 
> Does anyone know of a forum better able to answer this question?

	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