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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Hi all. Not so long ago I mentioned on #hvcomm about my idea to build a flyback array mounted on a rotating plastic or glass disk, with all the discharge points towards the centre, and the batteries in series around the perimeter.
The idea is that if you rotate the arc points it should not only look impressive (like a "pinwheel" effect) but might also encourage the plasma to rotate around the central axis. Normally you would need an enormous magnetic field to do this, but hopefully mechanical rotation will suffice.
Registered Member #19
Joined: Thu Feb 02 2006, 03:19PM
Location: Jacksonville, FL
Posts: 168
Lots of questions. How many flybacks are you planning on using and how will they be powered like driver on the board/off the board. Is this ion motor affect similar to what you are doing?
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Update for those who are curious.
I've completed the installation of the batteries (16 1Ah used NiCads) onto the glass disk, secured using epoxy. I'm going to test these to make sure they are reliable and can provide the rated current (they are pretty ancient but "new old stock") and then secure using more epoxy (wasted most of my last tube gluing a bleepety bleeping infrared headphone tx and masthead amplifier to a wall!)
Change of plan; probably not going to use flybacks but instead am going to modify some of my cold cathode drivers to run on 20V to save weight and space. This also makes balancing that much easier as the boards weigh a lot less.
Alternate idea is to wind my own flyback array, which allows more flexibility in the design (can wind several small cylindrical units).
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Again I ask: wouldnt it be far easier to make only electrodes rotating, one tapped in the middle and other one to ring-shaped slidar contact?? Later you can position them on disk as you wish, and generated arc effect is same in both situations???
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
If I understand what's planned; Somewhere in this system there will need to be a high voltage path via the rotating shaft? If so this really should be an EARTH connection for safety and simplicity.
This earthed-axis could have a set of short pointed spokes in the middle of a rotating plastic disk. This would allow the 'spark-generators' to be stationary, arranged around the disk (below/behind ?) with hv discharge points pointing to the rotating hub of pointy spokes. The hv generators would be easy to earth and power (ststionary).
Would this give the same effect? If so it would be much easier to build.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
Hi, I'm looking into this- it might be simpler to use the glass plate as a convenient insulated base and spin the output electrodes (got some glass cylinders with holes that i was going to use as a spark gap)
The basic structure could be used for several projects; putting the batteries around the frame makes it very compact and easily portable. (mobile SSTC anyone?)
Another idea I had was to put three smaller TC secondaries around the frame and have these arcing to a rotating centre electrode made of pins.
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Rotary flyback arc generator?
