Re: Help! My Coil Blew Up

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

Original poster: "S.Gaeta" <sgtporky-at-prodigy-dot-net> 

What is an "All-pass filter"??

Sue

*Snip*
 > There are several methods for adjusting phase shift, but I suppose you
want
 > something with a constant phase shift over a wide range of
 > frequencies.  All you need to construct is an all-pass filter with a dual
 > variable resistor (I think that'll work - just need to keep the poles and
 > zeros reciprocals).  But more likely would be something with a constant
 > time delay to compensate for switching time.  Of course, a time advance
 > can't be made, so a delay of a full cycle is the only option, but the
 > obvious problem is that the length of a full cycle changes with Fres,
which
 > is exactly what we're trying to track changes of.  So, a PLL is the best
 > thing I can think of to actually work well, but of course that is getting
 > way to complicated.  Maybe some DSP on the primary current waveform to try
 > to keep it as clean as possible by changing the switching time? :-)
 >
 > Okay, enough "good" ideas for one night . . .
 >
 > Sean
 >
 >
 >