 MOT Power Dual Ignition Coil Driver
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MOT_man
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Registered Member #1127
Joined: Mon Nov 19 2007, 12:08AM
Location:
Posts: 139
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prodigy wrote ...
I will try to get some pics soon. The arcs tend not to be the longest because of insulation problems. But they are fat orange and very loud.
I estimate the frequency around 15khz.
Just last night i modified the design and made a push pull configuration (which used a separated diode bridge so 1/2 AC wave went to one capacitor bank and the other 1/2 wave went to another bank). It basically blew off layers of insulation. Melted my spark plug and generally went awol.
I think we have misunderstood Nikola Tesla with his intentions of building his coil.
Bigger is not better. We need low capacitance low inductance and high powers.
Imagine this: the capacitors charge instantly (almost), then the spark gap experience over voltage. Then the capacitors discharge in the same short time.
The short discharge period would put less stress on the spark gap and a static gap would be suitable. This would also produce a phenomenal flux collapse which would increase efficiency.
Image building a high frequency, harmonious, AC tesla coil. It may be possible with such a setup to use less windings and less copper and produce higher voltages at higher efficiencies?
Think about it. I think all tesla coils are being built incorrectly. This is my humble opinion please dont take offense. Also maths isnt my area so please no silly equations.
Cheers!
-Prodigy
I'd say that your dead wrong about the use of less copper.
You see, I've been building coils for years and I have to say that high voltages have to do with input voltage at the spark gap level + the inductance difference between the primary coil and the secondary coil.
I can tell you quite frankly that my 27 AWG wound secondary on 6.5" PVC with 1650 turns produces vastly more volts than my 18 AWG wound secondary that has 800 turns on 6.5" PVC.
The sparks are brighter, and about 35" longer on my 27 AWG wound coil at the same power level - it happens to be running at 4400 VA.
Why - inductance factor and less losses in the spark gap = greater potential for voltage rise.
Talk to the experts! Its all been measured. Have a go yourself and see.
Nikola Tesla even proved this theory true as well. He built a 3 stage coil system - also known as a magnifier - which essentially does the same thing as a 2 coil system - except it uses high inductance to further quench and raise the inductance level of the secondary coil THUS creating better efficiency - which gives longer - brighter and high voltage ARCs.
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