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Re: Wattmeters
Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
Hi,
At 09:03 AM 7/25/2005, you wrote:
hi Terry.
> Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
>>>in generally - how wide is the spectrum of the current drawing by real
>>>TCs - without mains filters, power correctors?
> I used MicroSim to do the spectrum on the AC line for my DRSSTC. It
> said that almost all of the power was at 60, 180, and 300Hz
i don`t have a MicroSim, only SwitcherCAD III (maybe it`s the problem?
If you want it, The free version of MicroSim is at:
http://hot-streamer.com/TeslaCoils/Programs/1-91pspstu.exe
http://hot-streamer.com/TeslaCoils/Programs/pspice.pdf
http://hot-streamer.com/TeslaCoils/Programs/pspcref.pdf
^_^), but here`s the spectrum from my 4fd aka "4 flyback drive" project
(freezed, like all my projects more than year ago :-EEE)
http://cis.ru/~dest/4fd.gif
3300mf, about 3.5kw and about 7kva, but i don`t care! %-)
> I do have RC filter resistors in the AC line however which may
> substantially cut down the higher harmonics too.
what`s time constant of your filter? first order?
http://drsstc.com/~terrell/schematics/PowerFilter.gif
R1 and R2 are really 1/2 ohm now.
i wonder - if the commercial line filter (say 30a) could be able to
clean the spectrum of the classic coil (say at the 5 kva) down to
100-200 hz?
Most line filters are made for far higher cutoff frequencies. They
usually have the diagram and component values on the cover.
DRSSTC have really big buss caps, so a little resistance in line with
them just softens the spikes some as needed.
Cheers,
Terry
-------
All I saw was a bright white flash, an explosion like a high-powered
gunshot, and the thick smell of ozone and electrical damage.
(c) Richard Quick 22-01-95 00:13:00