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Registered Member #4074
Joined: Mon Aug 29 2011, 06:58AM
Location: Australia
Posts: 335
Avi wrote ...
any option for one with 12v in (10A max), with at least 10kv output?
They seem to be capable of much more than 10kV, and winding a primary coil for a 12V driver isn't an issue. There seems to be a nice large winding window, so its easy to change primaries quickly.
Fiddy, I'm interested in getting two transformers (kizmo's video of the extreme power-arcs persuaded me). I guess postage will be rather cheap since I'm in Melbourne.
Registered Member #8817
Joined: Mon Dec 17 2012, 05:16AM
Location: Australia
Posts: 110
Avi wrote ...
any option for one with 12v in (10A max), with at least 10kv output?
As GrantX said, they run on 12V no worries and develop more than 10kV.
Shal i put your name down for one? two? 27? :P
GrantX wrote ...
Avi wrote ...
any option for one with 12v in (10A max), with at least 10kv output?
They seem to be capable of much more than 10kV, and winding a primary coil for a 12V driver isn't an issue. There seems to be a nice large winding window, so its easy to change primaries quickly.
Fiddy, I'm interested in getting two transformers (kizmo's video of the extreme power-arcs persuaded me). I guess postage will be rather cheap since I'm in Melbourne.
Sweet GrantX ill add you to the OP, yeah would be $10 express id say
Registered Member #3414
Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245
Yuri_Ivanov wrote ...
I am the person Erlend mentioned before,and we are the manufactures of AC,DC,HV transformers,if you are interesting in bulding,we can discuss together
The only criticism I have of Fiddy's flybacks is that there is not much room to fit a primary UNDER the secondary. There is some room there and I'll see if I can fit a foil primary in there.
I think there is a market for AC flybacks with sufficient room for the primary UNDER the secondary. I'd buy some myself if they were available.
This SHOULD improve the characteristics of these flybacks considerably.
(Maybe there is sufficient insulation in Fiddy's flybacks to open up the hole in the secondary? Maybe ream it out a bit, but I've not tried this yet. Has anyone sawn one of Fiddy's secondaries in half yet?)
Registered Member #8817
Joined: Mon Dec 17 2012, 05:16AM
Location: Australia
Posts: 110
Ash Small wrote ...
The only criticism I have of Fiddy's flybacks is that there is not much room to fit a primary UNDER the secondary. There is some room there and I'll see if I can fit a foil primary in there.
I think there is a market for AC flybacks with sufficient room for the primary UNDER the secondary. I'd buy some myself if they were available.
This SHOULD improve the characteristics of these flybacks considerably.
(Maybe there is sufficient insulation in Fiddy's flybacks to open up the hole in the secondary? Maybe ream it out a bit, but I've not tried this yet. Has anyone sawn one of Fiddy's secondaries in half yet?)
My flybacks were designed for winding a primary underneath the secondary. I have a blown one here that i will cut in half soon.
Registered Member #580
Joined: Mon Mar 12 2007, 03:17PM
Location: Melbourne, Australia
Posts: 410
GrantX wrote ...
Avi wrote ...
any option for one with 12v in (10A max), with at least 10kv output?
They seem to be capable of much more than 10kV, and winding a primary coil for a 12V driver isn't an issue. There seems to be a nice large winding window, so its easy to change primaries quickly
what is the maximum rated output voltage?
Fiddy wrote ...
As GrantX said, they run on 12V no worries and develop more than 10kV.
but
Fiddy wrote ...
With a 10 turn primary, 22VDC loaded @ 17A it was putting out 13.2kVAC RMS @ 28mA and has capacity for more!
(10/13.2)*17=12.88 amps required for 10kv
Fiddy wrote ...
Shal i put your name down for one? two? 27? :P
27?! no! somewhere between 0 and 1, depending on answers and things.
Registered Member #8817
Joined: Mon Dec 17 2012, 05:16AM
Location: Australia
Posts: 110
Avi wrote ...
GrantX wrote ...
Avi wrote ...
any option for one with 12v in (10A max), with at least 10kv output?
They seem to be capable of much more than 10kV, and winding a primary coil for a 12V driver isn't an issue. There seems to be a nice large winding window, so its easy to change primaries quickly
what is the maximum rated output voltage?
Fiddy wrote ...
As GrantX said, they run on 12V no worries and develop more than 10kV.
but
Fiddy wrote ...
With a 10 turn primary, 22VDC loaded @ 17A it was putting out 13.2kVAC RMS @ 28mA and has capacity for more!
(10/13.2)*17=12.88 amps required for 10kv
Fiddy wrote ...
Shal i put your name down for one? two? 27? :P
27?! no! somewhere between 0 and 1, depending on answers and things.
Registered Member #4074
Joined: Mon Aug 29 2011, 06:58AM
Location: Australia
Posts: 335
Avi, I believe the manufacturer stated a breakdown voltage of approx 80kV. Should be able to squeeze 20-30kV safely.
In your example you showed that it takes 17A at 22V on a 10 turn primary to create an ouput of 13.2kV and 28mA (approx 370VA), so a 5 turn primary would be a good starting point. Input current will vary, depending on switching frequency and the topology of your driver. You wanted an input of 12V at 10A, or 120VA, so you would be getting a short circuit current of 12mA with an open circuit voltage of 10kV.
These transformers should easily handle 120W at 10kV for hours, and Kizmo stuffed several kilowatts into his. What circuit do you intend to use as a driver? Do you have any specific frequency range in mind?
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
i worry about claims of 120 watts and above based on some few mA at the short circuit voltage. I really wonder if the "real" voltage sags more than 10kv. I suppose im the one in a position to confirm or reject my suspicions.
I have the high voltage probe. a similar flyback, and would just need a load resistor that could handle 100+ watts for a few seconds.
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Modern AC Flyback Transformers
no!