Re: [TCML] solid state varaic

[Henry Hallam <henry@xxxxxxxxxxxxxxxx>]

Steve,
Any more details or references on the hysteretic control scheme?
Sounds interesting.

Thanks
Henry

On Tue, Jul 27, 2010 at 8:38 PM, Steve Ward <steve.ward@xxxxxxxxx> wrote:
> Scott,
>
> Yes, what you describe can be known as a synchronous-buck converter, which
> are popularized by class-D audio amplifiers.  Basically a half or
> full-bridge configuration of switches, and a LC output filter.  The PWM
> control can come from a variety of techniques from classic controls theory
> and standard PWM generating chips, or to something more clever like
> hysteretic control laws, or "one cycle control" techniques.  Each control
> scheme has advantages, the hysteresis one is my favorite due to the
> simplicity and robustness and almost guaranteed stability, the disadvantage
> (and lack of presence in industry) is possibly due to the shift in switching
> frequency of these control schemes, which can possibly increase the cost of
> the EMI filter at the front end to pass emissions, but for us tesla coilers,
> we dont care about minor EMI problems so its a good solution.
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla