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Registered Member #223
Joined: Mon Feb 20 2006, 06:42PM
Location: Ottawa, Ontario, Canada
Posts: 125
Ok i know i'm probably sounding a little ignition coil crazy... I know that Terry used an Ignition Coil with its core removed to use it in a classic tesla coil type circuit. However it would be interesting to see the other types of telsa coil implimented this way. Like building a VTITC (Vacuum Tube Ignition Tesla Coil) or a SSITC (Solid State Ignition Tesla Coil). These probably sound like really crappy acronyums.. The VTITC would probably be the hardest to build since you would have to wind an additional feed back coil. Think about it you wouldn't have to spend hour(s) winding a secondary becaause it is all ready done for you.
I guess it would be rather pointless since most ignition coils would probably fail rather quickly being used like a Telsa coil. Also calculating proper tank circuit values would be a pain but not impossible. All in all I think it would be a rather interesting project.
Registered Member #206
Joined: Sat Feb 18 2006, 03:17PM
Location:
Posts: 72
Hours for winding a coil? I've wound 1000 windings 0.05mm wire for my nanoSSTC project in less than 5min The insulation of a ignition coil would be too bad for use as tesla. Why do you want to make so much mess if you can drive the coil even better if it's potted and has a iron core?
Registered Member #229
Joined: Tue Feb 21 2006, 07:33PM
Location: Romania
Posts: 506
I tryed the tube approach for the ignition coils (with the iron core in position) with poor results. The resonant LC circuit was composed by the primary of the IC in serie with the primary of a little transformer (to get some feedback for the tube), and the primary cap. It was not worthing to make photos.
Registered Member #223
Joined: Mon Feb 20 2006, 06:42PM
Location: Ottawa, Ontario, Canada
Posts: 125
WOW 5 minutes for 1000 turns? Are you sure? That is ~3.3 turns per second. That’s fast if you are doing it by hand. The reason why you remove the core is for 3 reasons. 1. The metal of the core can saturate causing losses. 2. By removing the core you reduce the stress on the HV windings. 3. If it has a core then it wouldn't be a true Tesla Coil.
Also a I.C. is very small and compact.. I'm willing to bet that and ignition coil run as a Telsa coil will have more output than a conventional 'single layer' secondary Telsa coil of similar dimensions. That is why I propose this 'new' design.
Then agian this was only an idea..
I will attempt to make a VTITC by removing the casing and core of my ignition coil and winding a feedback coil around the original primary. ~100 turns of 30awg should do it. If I get some good resaults I will post them.
Registered Member #75
Joined: Thu Feb 09 2006, 09:30AM
Location: Montana, USA
Posts: 711
I like the idea, and I might do this to my unpottet IC. I originally planned to give it a ferrite core, but it seems to be impossible to get cores of the required dimensions. Once I figure out the inductance and capacitance of the coil (easy if you've got a function generator which I don't), I will try hooking it up to my PLL-controlled halfbridge.
Registered Member #206
Joined: Sat Feb 18 2006, 03:17PM
Location:
Posts: 72
@dan: It's the 4th nano tess in the last 3 days... I wind them with a cd player motor. The winding itself wouldn't take more than 2 minutes. I spend most time on little failures that aren't very rare, if you work with very thin wire.
I have some IC plasma globe pics:
I had better results with an AC-flyback, but if I hold a lamp near to my tiny SSTC (80W), there are some thick, very hot, yellow-orange plasma "clouds" that can melt the lamp within 30sec or so and don't look very nice to me. I like those string-like plasmas more than the "clouds".
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New type of Tesla coil.. or not
The insulation of a ignition coil would be too bad for use as tesla. Why do you want to make so much mess if you can drive the coil even better if it's potted and has a iron core?
