Thane Heins Perepiteia Replications

[minde4000]

By the way, i am urged to ask you again Minde. in your heat-build coil, that you say the heat does not originate from core rather than windings, what is the current at short???
It must be a lot to do so.
Just calculate heat buildup by the current-resistance formula and tell us.

Shorted 0.55 amps. The thingy is bart that my coil heats up without any short with open circuit once I reach some 2500 rpm and up. No need to short. I increased gap this morning. "Heat index" rose from 2000 to 2500 rpm looks like but power output dropped almost in half altho it still accelerates very well.   

Minde

[baroutologos]

@ Thane
I am familiar from School days about Plato's Ideal State, but never gave a second look on it.
As i getting older, this is on my-to-do list!
Have in mind that Plato was the only to one to report Atlantis. So the Ideal state may has something to do with it. (Atlantis was the inspiration?)
......

Yes, i go with one coil to investigate output - not accelaration so much. Only the max output before drag appears, i am only concerned at the momement. And yes again, i have ordered for 10 long coils to form 5x2 closed magnetic loop pairs, wired with 24awg (1kgr each).
22 is just too much for this setup.

.........
@ Minde
So Mr T must be right. i cannot see any reason with windings could warm unshorted unless:
heated by core or internal short. short not present (as you suggest) so heated by the core. If you claim that core stays cool, then you claim something extraordinary.

* 0.55 amps? Geez, in the 50 ohms setup? That equals a 15 watts ohmic loses. 15 watts can easily warm up a coil (when shorted).
Regards,
Baroutologos

[broli]

Thane, can the transformer go beyond the milliwatt range? Or will things fall apart? What is currently holding it back from outputting 100 watt for example?

[oscar]

..... i cannot see any reason with windings could warm unshorted unless:
heated by core or internal short. short not present (as you suggest) so heated by the core. If you claim that core stays cool, then you claim something extraordinary.

I am not sure,
but yes, the whole thing is EXTRAORDINARY.
And there should be an electromagnetic signal oscillating in the windings due to the aproaching/receeding magnets. So what should keep the windings from heating up (even if not shorted , i.e. even at open circuit) ?
Lightbulbs heat up too,
even at open circuit, stimulated by wirelessly received pressure waves.

Minde's coils are just too perfect.

[Yucca]

Hi Thane and All,

Here are pics of my new BTT. Full metglass tape wound core components. Initialy I built with iron wire primaries and it did not perform very well. Then I unwound it and rewound on a full metglass core.

At the moment I have only used 50% DC pulse excitation. 0V...20V   kHz range.

I scoped over non inductive R and took a snapshot of the input transient with DSO and calculated single pulse energy, then multiplied by total pulses given in time X to calculate average power.

I connected the secondaries in series and squirted them into a 470uF electrolytic cap using a 1n4148 full wave bridge and timed how long to charge to 20V thus calculating output energy over time X and thus average power.

The thing seems to have some resonance at 80kHz and at that value I saw over 90% transformer efficiency. this suprised me because my excitation pulse is not ideal for a cored transformer, a really sharp pulse containing very high frequency components that the core can simply not pass, also field reversal is not optimum only achieved by the backspike. I knew it wasn't all passing because I tried my AM radio and it was buzzing loudly as the corners of the excitation pulse radiated as RF in the primary.

I tried passing from one secondary to the other, it is less efficient, less than ~70%. So BTT is performing better than a straight toroid of metglass on square pulses.

When my new sig genny arrives I will put it through it's paces using nice pure SIN. I bought it untested for a real good price, fingers crossed it's not a dud :

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=150358965987

I also tried a neon bulb on the secondaries in series, it lit nice and bright with less than 20mW RMS primary input power, it performs better than a Stiffler SEC unit which needs over 50mW to get the same visual brightness, again this spooked me a little.

I can't wait for my signal genny, very clean sin so I can do power factor stuff at multiple frequencies and get a better handle on this. Thanks for the concept Thane.

Yucca.