Re: SSTC, induction heating papers?

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

Original poster: "David Sharpe by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sccr4us-at-erols-dot-com>

Jan
There if not much out there.  I've done some work in this area with micro-IH
(<100W, 16-24VDC input).  The only way to auto tune is by monitoring
phase angle of I to V and adjust Fo accordingly.  If the load is relatively
fixed
(i.e. resistive of 1ohm or less without reactive components), the control is
relatively straightforward.  Trying to drive a reactive load, and
"impedance matching"
to such a widely varying load will be an exercise is futilelity.  This is
why I'm
researching the IDR concept; reduce to source impedance as low as possible,
then the load impedance variation will have minimal or no impact on power flow
to source.

Regards
Dave Sharpe, TCBOR
Chesterfield, Va. USA

Tesla list wrote:

> Original poster: "Jan Florian Wagner by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <jwagner-at-cc.hut.fi>
>
> Hi,
>
> just a short but probably odd question: does anyone happen to know of any
> _good_ papers on resonant induction heaters? Or on resonant freq tracking
> high power piezo drivers? (especially piezo drivers would be interesting)
>
> With "good" I mean that it would contain info on _how_ the resonant freq
> tracking in a multiresonant system is actually achieved, and not just high
> flying theory and maths... I've been looking on IEEExplore and the local
> library and other places, but somehow all papers fail to tell how the
> driver circuitry might be implemented - it's always just the high power
> parts considered in detail...
> So, anyone happen to have stumbled over such a paper by accident at some
> time?
>
> cheers,
>  - Jan
>
> --
> *************************************************
>  high voltage at http://www.hut.fi/~jwagner/tesla