Cooling effects in Steorn eOrbo

[k4zep]

That scope shot was actually taken before I hand adjusted the magnets. I was able to get the coil output down a lot more, but still not perfect, lol.  So in the video the magnets were better situated such that it had less interaction with the toroid coil.


lol, I won't change a thing, but there was no current in the toroid coil during that video footage. The dremel motor was rotating it, but weird thing is that a lot of time all of a sudden the dremel motor rpm would drop or increase by magnitudes. Very strange effect by itself.

I still don't know if the temperature dropped below ambient. That's what the IR gun showed, but this still needs lots of careful repeats to make sure.

Hi Paul,

Several things come to mind. 

Ol Dremels are actually DC motors with brushes, at low speeds, the will jump around a bit if the brushes are "Hoppin" in the guides or getting near the end of their life.  You might want to clean the brush area and replace the brushes.

The series, non powered circuit actually has some protection diodes in it.  Who knows what the impedance around the loop was.

Magnetic fields might have been changing bias in the IR meter analog section.....  I have had magnetic fields muck with electronics near them.

I hope this doesn't fall into the "unreproducible results category".....yes, I have been there too, especially with Bedini circuits.....

Get a good nights sleep, keep it cool, keep building and keep uploading to YouTube, good bad or ugly.  Sometimes for every step forward,
we go two steps backwards.......RPM sounded in the 2-3K rpm, at the low end range for the Dremel.

Hang in there,

Respectfully
Ben

[lumen]

Paul,

Using two magnets on such a tiny diameter, it is possible to force the toroid to act as two separate sections and induce a voltage in each section and the same direction.
Something like if the toroid was cut in half and two spinning magnets were placed in the gaps where it was cut.

It's the same effect as two small coils placed around opposing quadrants and energized to force a circular field through the toroid.

Try using a single magnet and see if you can achieve the same results.

[hartiberlin]

Hi Paul,
you have had locked yourself the other thread either accidently
or somebody logged into your account.

Did you now change your password ?

I was wondering, why you still had connected the power supply in
off state to your coil ?
Output capacitors in the power supply then can still influence your output wave.
Better disconnect the coil from anything other than the scope.

Also what Ben says is correct, it could be, that your magnet on each side of the rotor
are misaligned.

Regards, Stefan.

[PaulLowrance]

Well here's some interesting news. It turns out that I had a 0.1uF capacitor connected to the scope input. Far prior to this experiment my scope probe broke, so lately I've been using a connector with two clip leads. Anyhow, the dremel drill was putting out some noise so that's the reason for the .1uF capacitor.

The toroid say 1.03 HY. Since it has a lot of windings, it could be 1.03 henry. Not sure if that would be from center tap to an end or the entire coil. The resonance of 0.1uF & 1H is 500 Hz. So the spinning setup was not terribly far away from resonance if the toroid is close to 1H. Remember there are magnets on each side, so if the dremel was spinning at say 3600rpm (60Hz), then that's 120Hz.

Also the toroid is a tad over 100 ohms from either end to center tap. Not sure how much capacitance.

Later on I connect everything to see what the resonance is.

The resistance from the power supplies is 600 ohms, and when the DMM is in diode mode it shows 0.570V. The scope itself shows 1Mohm.

Furthermore, I just looked at the rest of the video (not shown on youtube because it's way too long).  Into the video I disconnected all of the wires to the toroid, and I swear the temperature immediately began increasing!  Let me take a look at the video to see how high it went.

[PaulLowrance]

Okay, here are the readouts:

* Immediately after removing all of the clip leads to the toroid (took maybe 10 seconds) the temperature read 65.3F. It was 64.8F when all wires were connected. This is at 12:25 time mark (12 minutes & 25 seconds into video).

* At 12:52 (12 minutes & 52 minutes into video) it read 65.5F.

* At 13:14 it read 66.2F.

* At 13:47 it read 66.6F. I recall reading in the IR gun manual that it has a 0.2F resolution. Don't know the details, but I've seen it show 0.1 resolution. At this point I hear the rpms going down considerably, almost a stop.

* At 14:16 it read 66.9F.
 
(Removed IR-gun & began measuring temperature of the dremel, which showed up to 84F on the outer plastic casing.

* At 16:17 it read 67.9F.
   
 
Also, it's important to note that the IR gun was not pointed at the magnets, but the toroid. If memory holds true, this IR gun as a 12degree angle. So all of these temperature measurements are scaled down because a lot of what the IR gun was seeing was the wooden desk. So it's probably a lot more than a 3 degree F drop. Hopefully today we can find out with the tiny 402 SMD thermistors.