The new version corrects a bunch of the glaring mechanical deficiencies of
the original. We've also added noise protection for the driver and
overvoltage protection on the IGBT's, but the current limiting is still
"passive" and determined by the primary configuration and tuning point. I
did some fairly extensive testing on the new coils and even during severe
fault conditions (such as internal tracking on the secondary causing the
streamer to disappear altogether, which has of course been fixed for the
production coils) the current stayed well under 300A.
On Sat, Jul 19, 2014 at 10:32 AM, Edward Wingate <ewing7@xxxxxxxxxxxxxxxx>
wrote:
> Bayley,
>
> Do you have any plans to correct the glaring deficiencies in the original
> One Tesla design before moving on to new projects? The lack of a current
> limiting circuit, for instance.
>
> Ed Wingate RATCB
>
> On 7/18/2014 4:30 PM, Bayley Wang wrote:
>
>> Hey all,
>>
>> We (oneTesla <http://onetesla.com/about>) have just launched a
>> Kickstarter
>> campaign
>> <https://www.kickstarter.com/projects/onetesla/tinytesla-
>> the-little-singing-tesla-coil-anyone-can>
>>
>> for a pair of coil kits that might interest you - tinyTesla, a small MIDI
>> SSTC, and oneTeslaTS, a desktop DRSSTC.
>>
>> There's a lot of info on the Kickstarter page, but here's a summary of the
>> cool features the coils have:
>>
>>
>> - Both kits are MIDI controlled; oneTeslaTS is controlled via the
>>
>> traditional computer->MIDI Adapter->Interrupter pathway, while
>> tinyTesla's
>> interrupter connects via USB and shows up as a USB-MIDI adapter. Both
>> interrupters are fiber-optically isolated.
>> - Zero tuning required. In particular, TS's secondaries are all
>>
>> identical down to the last turn, and the primaries are spirals on a
>> 4oz
>> PCB, so each and every coil should perform identically.
>> - Both coils are super-compact, mostly thanks to the fact that our
>>
>> coil-winding partner can wind very high fill factor secondaries TS
>> has a
>> 6.5" secondary and 6"x1.5" topload that resonates at 250KHz, and tiny
>> has a
>> 3.5"x3" secondary that runs at around 450KHz unloaded.
>> - We tried hard to keep the primary current down on TS; it sits at
>>
>> around 200A right now, which is not too hard on the 180A-rated
>> IGBT's. This
>> should give a longer lasting coil.
>>
>> Thanks in advance for your support, and feel free to ask questions!
>> _______________________________________________
>> Tesla mailing list
>> Tesla@xxxxxxxxxx
>> http://www.pupman.com/mailman/listinfo/tesla
>>
>>
>>
> _______________________________________________
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> http://www.pupman.com/mailman/listinfo/tesla
>
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