HOG01 Hartmann Orthogonal Generator

[fleebell]

The last one I made was the little windmill one.
http://www.leebell.net/workshop/pics/PHOTOP4.JPG
It has 8 coils. Each coil has a 1/2 sperical supermagnet in it and I think it was 1500 turns of #28 wire.  It will put out almost 1/2 an amp at 6+ volts if turned about 60 rpm-70 rpm.  It puts out almost as much at the bobble gen in that pic that uses 3/4 by 1/8 disk magnets and twice as many coils.  It really didn't matter which way I mounted the magnets as they are far enough away from the coils you notice almost no drag anyway.  Thats the whole key, just close enough to flip the magnet but not enough to really affect the coilds themselves.  The rotor magnets don't face the coils the n/s ends are inline with the rotor disk instead. I get much more flipping action that way.

Lee

[hartiberlin]

Hi Lee,
about 3 Watts is pretty good output !

Did you ever try to use a small efficient DC motor
to turn the rotor from the 3 Watts output ?
Maybe it is enough to close the loop ?

Many thanks for all the infos.

[hartiberlin]

One other idea to power the first coil in my HOG is
also to use a bigger many thousands winding primary
coil and attach to the magnet a string and if the magnet falls down
the string will close a mechanical switch and this energizes the coil
from a NiMH or Lead acid accumulator.
If you use the right contact materials for the switch
there will be lots of sparks and RF bursts on the
switch contact points and your battery will never discharge,
if you tune the spark right.

Maybe the secondary coil is then able to power via a greatz bridge rectifier
some supercaps and use a supercap instead of the battery to power
again the frist driver coil.

Then we might have closed the loop.

Regards, Stefan.

[fleebell]

I don't think it would be able to run a motor very well. The current averaged out about 1/2 an amp on both analog and digital meters but looking at it with a scope showed a really messy hash. Maybe feeding the output into supercap would help but the bobble gens work alot better at charging batteries (what I designed them for).  The messy output seems to work really well for that purpose. I have no idea why, although there is probably someone on here that can explain it.  My original aim was to build a big bobble gen operated by a planned water wheel in my back yard at the end of my shop. It will be charging a battery bank.  The thing about the design is you can keep adding coils and magnets as you (meaning me living on disability) can afford them.  I want to build one with a 6 foot rotor with ALOT of coils operated by a 10 ft wheel.  It will in turn be operated by a solar hot water panel (rankine engine) pump system.   Yup, it will be a real rube-goldburg type setup but all my designs are expandable on purpose due to this plan. Eventually my shop will be self powered.

I wish you luck on you project there, I might experiment a little bit in that area since I've got some coils already made, just need to add the extra coils. It's a very interesting idea to me. I wonder if a "basic stamp" micro could be setup to operate with some feedback that would pulse the flipper magnet at the most efficient speed to generate maximum current/voltage depending on load?. I know my bobble gens seem to have a preference for a particular speed depending on what I have hooked up as a load. If you spin it faster than that the output goes down not up.

Lee

[tomas]

hey

you can get the magnets in resonance by pulsing them with the 7.8 Hz signal, but the magnets movement itself is variating due to the mass of the field.

T.