Team
Seasons greetings
IMHO DC resonant charging is good compromise with MOT's because
* With a single MOT using the designs published by "drilling" on Terry's
site (originally published by Steve Connors as "scopeboy" ) see
http://www.capturedlightning.org/hot-streamer/drilling/dccoil.htmlremarkable results from a single MOT, not complex and used twin level
shifters and resonant charging to get 20kV from a single MOT. When I made
this design I used two MOT's secondaries in series gapped to 0.3mm for ring
up and Primaries removed. Sadly full cct at scopeboy site not currently
posted but will be around somewhere. Best bang for buck coil design I know
of gives me reliable coil achieving 700mm spark
* I like the power control available with variable break rate simplifies
ballasting avoided all ballasting in my machines) I am suspicious of the
energy stored in the ballast causing big voltage spikes if the machine
misfires
* The ability to alter break rate without difficulty is a nice effect
acoustically
* Complexity of SRSG avoided
* Silicon is really cheap and mounting a few dozen series diodes on a piece
of acrylic for DeQ and/or FW rectifier is not a problem
* Increase in available voltage at Cp with resonant charging is IMHO a
better method and it keeps the very high voltages confined to a small part
of the machine. Even 6 MOT's is rather low voltage
* I find DC designs smoother in operation with no interaction between
mains frequency and actual break rate
* I thinks as opposed to know that the extra voltage generated by resonant
charging makes a more economical Cp considering Pk currents and voltage
ratings of MMC bits
* I believe it protects the MOT's from breakdown to the core due to DC
filtering and smooth operation, I've had problems in the past with AC
designs impacted by voltage spikes breaking down to the core but never with
DC designs
* MOT's for DC filters, primary xfrmr arrays and ring up chokes are
plentiful and cheap, heavy however.
As others say all here is lethal and care is essential 12kV 1 amp no second
chances here
Rgds to list
tedl in NZ
-----Original Message-----
From: Atomic
Sent: Friday, December 23, 2016 9:34 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Tesla coil setup using MOT
Is there a clear advantage in using the DC resonant charging approach
versus just using the MOT's AC output? It would use far less components
that way, seems quite simpler.