Hi Greg and Stefan,
The combination of resistors, capacitors, and spark gaps in a Terry
filter provide a low-pass filter and protection from primary strikes.
The resistors and MOV's provide rapid damping of energy from UHF/VHF or
other over-voltage transients. But the protection comes at the expense
of significant parts count and added power losses. This filter was
designed primarily to protect fragile NST's, and it should provide
similar protection for other fragile upstream components, such as
charging inductors. However, Greg's approach is more cost-effective and
efficient.
Until Greg's last post, I was unfamiliar with his current protection
approaches. His L-diode protection scheme has the advantages of being
robust, easier to construct, and significantly more efficient - and it
has demonstrated its reliably in large systems. Stefan, I see no reason
why a similar approach shouldn't work for your system as well. I
certainly can't argue with success. :^)
Best wishes,
Bert
Teslalabor wrote:
> Hi Greg & Bert,
>
> very interesting! Regarding my 6-pulse rectifier, I now have a better
> feeling :-) Concerning my other question, it really seems to be a good
> idea, to use any form of protection circuit, for not killing the
> reactor. Greg's concept of L-diode damped filter is completely new to me
> but sounds very cool, whereas I also never have built a Terry Filter
> before in my older (not DC resonant) systems. So the question is, should
> I use a simple Terry Filter or this L-diode arrangement. A terry filter
> doesn't have any L in it....
>
> Regards,
> Stefan