The TPU uncovered? (A PROBABLE technique.)

[innovation_station]

that's just inrush current. a common thing, but not ou.

i hope we're not talking about this? 

@pont   you make me lol

what might the inrush current be?

ist

[buzz-ard]

@poynt - I think that's the concern Paul expressed, that we're talking about inrush current, which we're not. It's the make & break events that cause the kick. On the make event, the inrush comes right after the kick. On the break event, the kick happens at the moment the circuit is broken. Tesla speaks to this also, emphasizing the importance of super-fast drop times.

[innovation_station]

and what does super fast drop times imply ??


not a cap 

ist

[poynt99]

@poynt - I think that's the concern Paul expressed, that we're talking about inrush current, which we're not. It's the make & break events that cause the kick. On the make event, the inrush comes right after the kick. On the break event, the kick happens at the moment the circuit is broken. Tesla speaks to this also, emphasizing the importance of super-fast drop times.

inrush currents, as far as my understanding goes, only happen when non-aircore cores are used. so keep it all air core and inrush current should not be present or a concern. if i'm wrong, then i'm listening.









@ist--pfo

[buzz-ard]

@poynt - On that I agree with you. Air cores have been the only ones that have given me any results worth pursuing while researching the TPU. Metal cores seem to dampen the kick effect while promoting inrush (I didn't even post my Renerator build attempt, the results were so pitiful). But the kick and some inrush happens in any circuit when power is applied. There has been much engineering devoted to bringing up power slowly to mitigate the effects of both the kick and the inrush. For instance, recall Tesla's work with DC generators, where men were getting killed when they brought them online. I've seen several solid-state examples as well. The one that stands out most in my memory employed a modified form of 0V switching, designed so that appreciable current flow was delayed until well after the switch (transistor) closed. The result was that power trickled at first then ramped up to operating level over several dozen milliseconds, and the failure rate of the application went way down. This approach is probably old hat now, but seemed novel at the time.

@Paul - You've built Tesla coils, right? (I have not.) From a safety perspective, do you power them up all at once, or bring them up incrementally?

Added after original post: I think many folks may see the initial voltage spike caused by transformer action and believe it is the kick. It is not. The kick is much faster and weaker. It shows up my scope very faintly and only in the smallest time divisions, so far. SM hinted that it's hard to see, but he's right - it is there.