HOG01 Hartmann Orthogonal Generator

[fleebell]

Stefan,
I have a suggestion. Get some marble shaped magnets and wind your gen coils on forms just a little bigger than the magnets so they can't really bounce but basically just spin around inside instead and try it that way... it works alot better that way in my bobble coils.  My coils with the sphere magnets tend to put out 2-3 times as much as the ones with the flat disks of the same diameter and they make much less noise!  I normally squirt a small bit of dry graphic lubricant inside the coil forms with the magnets before I seal the magnets inside. It makes it easier for the magnets to move/spin around. I use pvc tubing for coil forms.

I don't understand why your magnets don't bounce around at the higher osc freqs.   I know the gen coil magnets can bounce around that fast as mine do it without a problem.  The only thing I can think of is that your bounce coils are not strong enough.  But thats a battle there as you want them using as low a current as possible.  I guess your stuck with the low freq.

Lee

[hartiberlin]

Hi,
no there was no diode.
Just a 0.47 uF cap parallel with the first coil
driven by a 50-50 % duty cycle symmetrical square wave.
so the pusitive pulse is + 5 Volts
and the negative pulse is - 5 volts.

The function generator does not put out  Zero and + 5 Volts,
but - 5 Volts and + 5 Volts.

The first coil is wound onto the plastic baker in
the front, where you can see the magnet jumping inside.
it has brown plastic tape wound around it, so you can?t see the
coil wire.

The second coil is in the back, where you can see the copper wire.

Hope this helps.

Regards, Stefan.

P.S: Yes, could have also been 7.8 Hz,
where the magnets jumped the most,
I did not count it on the scope and the dial scale of the function
generator is not very precise....

[hartiberlin]

Hi Lee,
yes,good idea with the sphere ball shaped magnets.
Have to get a few.

Will try this then again.

Yes, this can be optimized in many ways.
One way would be to wind the driver and
output coil onto the same case,
but also 90 degrees rotated, so you just only need ONE
magnet not two !

Did it work better for you at around 80 to 100 Hz ?

How did you get so high frequencies with your

bobble generator ?

Many thanks.

Regards, Stefan.

[fleebell]

It's easy to get them there, you have to remember my setup has the flipper magnets on a shaft and spin past the coils.  Say rpm instead of hertz and you can what I mean.   The little pic attached shows one of my setups and the rotor between the coils. That rotor has 6 magnets on it so at 60 rpm I'm getting 240 passes on the magnets per minute... thats about max on that particular generator, going faster just causes the output to go down (not enough flip time)

(Well I tried to attach it I don't know what happened there ...this is a link to it though.

http://www.leebell.net/workshop/pics/TPROTO2.GIF

[hartiberlin]

Okay, I just found a bigger  picture
on your site about it:




Well, if you would rotate all coils by 90 degrees, the passing magnets
on the rotor would have less drag, so it would be much easier
to turn the rotor with less force.

What kind of power level do you get out of it with your
latest design ?
Many thanks.

Regards, Stefan.