[Lowfer] Triflier Core Winding

Peter Barick [email protected]
Fri, 12 Apr 2002 09:51:05 -0500


I think I have solved this issue which now has little to do with
Trifilar windings and more at specific textual interpretation of an
article in LOWDOWN by Bill Bowers, "Ferrite Facts - Part 3"--by me.

Bowers had been discussing properties and measured losses in a series
of articles. In part 3 he talks of setting up the cores for testing,
here varying the method of winding, as, spaced turns, twisted, on top,
and side by side.

For the twisted he states, "Twisting 3 strands for the secondary and 1
for the primary together and winding this, (trifilar) group evenly
around the core." There was no schematic drawing showing the turns. I
interpreted this to mean the "3 strands for the secondary" [note
singular] implied they had to be "common" or connected as parallel, not
what I NOW understand to be in SERIES, as the term TRIFILAR implies.

Gee, I think I have it right. I tried to engage comment on the Bowers'
article first and there was none. Next I had to formulate a position on
my interpretation of that article and toss that out. Well it seems my
interpretation was rather off the mark. But prodding by some on this
list caused me to find, then see the light.

Cheers, Peter,

A Reader of LOWDOWN
http://www.lwca.org/