Wild Idea OLTC - Split core inductors

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Wall Richard Wayne by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rwall-at-ix-dot-netcom-dot-com>



> Richard wrote:
> 
> "Replace them with much smaller LC tank circuits tuned to the frequency
you
> wish to pass.  Tank R can be held really low and at resonance Z can be
made
> zero.  If you play a little with Fo you can get some really interesting
> band pass filters.  You can make these little LC filters tunable and put
in
> as much tank Z as you desire.  Disassemble a flyback core and wind your
> much smaller inductor.  Don't forget to put the shims back in."
> 
> A wild idea I need to look into :-)))

Terry,

Why are these large inductors here in the first place?  What do they do? 
They do form an LC filter on each side with Cf1 (1uF) and Cf2.  Are they
just for smoothing DC?  If so, just make CLC pi filters on both sides.  Put
Cf3 and Cf4 (like above) below the inductors on both sides.  This would
allow much, much smaller inductors.  You could use 600 VAC motor run caps
for the Cf caps.  You could use much higher cap values than 1 uF.  Run a
spice model to choose size of capacitors and inductors for CLC pi filters. 
Price should be very inexpensive.  If you really want to make it easier
make CRC pi filters and use very low R high Watt resistors to avoid loses. 
This would eliminate the inductors all together.

Keeping it VERY simple,

RWW