|
Re: Heating in 4-1/2 turn inductor
From: tmoranwms@charter.net (Tim Williams)
"John Larkin" <jjlarkin@highNOTlandTHIStechnologyPART.com> wrote in
message news:1mmf76td42ccev3pducdiu8og8f30kdtbk@4ax.com...
<big freaking snip>
One of my engineers, a real magnetics Pictures of People">guy who used to work for Signal
Transformer, designed a push-pull forward dc/dc converter using a pot
core. This was in the power supply of a laser controller [1] where the
customer, for reasons never rationalized, wanted our +24 power to be
isolated. One center-tapped winding included a half turn on each side,
and efficiency was terrible. Going to full turns, and wasting a bit
more power in a downstream linear regulator, worked much better.
Neither of us understood why.
Well that's obvious, it's acting like two transformers. Huge LL between
halves. Imagine the full path of each turn, it's effectively a full turn
around one outer limb or the other, but not both.
Whether or not you curve it tightly around the center limb doesn't matter,
intensions are lost on inanimate objects. :)
Tim
--
Deep Friar: a very philosophical monk.
Website:
|
