I had written the previous post to Marius with the vid about 3/4 finished(waiting for it to finish download) and after, I finished the vid and I see that the rotor speeds up considerably more with no load than with the short.

Well it seems you are hitting a resonant point in freq of the coil. If it is just a lower harmonic, then higher pulse rate (more mags or higher rpm) would be needed to to get there.

So if you double the number of magnets, at the same speed, you will be near the next octave.

From what I understand, a single strand coil has low capacitance. Low.  So the freq of resonance could be much higher than what we are witnessing and we are seeing a lower harmonic.  Maybe.  ;]

Mags

Quote from: Magluvin on September 07, 2011, 06:32:24 PM
Hey Marius

Very cool on adding the second bulb and getting the increase.
;]

Here is a question most should want an answer too....

Set it up the way you have in the video, where it speeds up very high when shorted.....

Measure the starting speed (no short)

Measure the top speed (coil shorted)

Then while at high speed, and coil is shorted, physically remove the shorted coil away from the rotor.

If when you do this, the speed goes down, then you have something big.  ;]

This will show if the coil helps the rotor achieve a higher speed than when the coil is not present.

So if its faster with the shorted coil than without the coil being near the rotor, then you need to add more shorted coils around the rotor.
Will it go faster?
Will there be a point that you can remove the drive coil and the rotor goes on by itself?  ;]

Good work your doing and thanks for showing.  I have not been able to get the shorted speedup yet.  Im hitting the rpms that you guys are, but maybe I need more for my particular setup and Im missing out on all the fun.  ;]


Mags

Hi Magluvin!

In the video I short the coil witch has a load connected.

If i short the coil WITHOUT the load, the rpm goes down. It does NOT ''overspeed''

What i don't understand is why instead of decresing more the rpm, it allowes the rotor to speed up

Timing.   ;]

Like if you take a quality lead crystal wine glass and wet your finger, then rub your finger slowly on the rim of the glass, at the right speed, it will sing.   ;]  tiny vibrations(you can feel) cause the glass to vibrate at a particular freq(rpm)

So this is what you are doing to the coil. It sings its way past the magnets. The coil oscillates in time with the rotor magnet passings at these rpms(freq). So the coil is in a swing(very fast) back and forth, in time with the rotor, and allowing the rotor to rotate more efficiently(less drag).  Still we have dome drag on the rotor as compared to no load.

I had explained this earlier that the coil may only oscillate for 1 cycle with a load to kill it, but with the rotor pulsing it at the freq of the coils resonance, the coil just may be leading the magnet pass due to the rotor hasnt gotten to the freq the coil wants to vibrate at yet. So this is where I see the long range speedup. The rotor speed catching up to the coils vibration speed. I believe anyway.  ;]

Do you have an oscilloscope?

Since you are at this point, have you tried fine tuning a bias magnet on the coil? This may help.

Also, I would love to see you output the coil to a bridge rectifier, then the dc to a cap, then see if both bulbs together are brighter than the bulbs directly on the coil. I think they will be brighter.  ;]  But will the rotor be faster also.  ;]


Mags

Quote from: gotoluc on September 04, 2011, 12:37:07 PM
Thanks Gyula,

you always come through ... this is exactly what I was referring to.

What made me think of this is because of Richard's post http://www.overunity.com/index.php?topic=3842.msg299387#msg299387 of a YouTube video of a generator that has next to no cogging. Link to YT video: http://www.youtube.com/watch?v=4nf4OJJuEiQ&feature=email

If we can build a generator that has next to or no cogging, then I quite sure we have OU.

I worked with Thane Heins for some months on his generator coils and I'm quite sure he would have OU if he could of only removed the cogging from his generator coils since when the generator coils were under load or shorted they had no Lenz drag on the prime mover.

To get Thane's effect a coil must be wound with many turns like a high voltage coil. So high Inductance is the main key. Later as Thane experimented with heavier wire he got more current out of his coils but he never got to the point of removing most of the magnet to core cogging. Now if we join or efforts, experience and knowledge we may get to an OU Lenz and Cogg free Generator.

If we use YouTube user llewgnal (Gary) minimal cogging design or maybe just biassing magnets if you think it's just as good. However, the big difference would be that if we use Finemet (nanocrystaline) cores instead of Ferrite since Ferrite has Inductance losses as the magnet approach it we may have a winner!... as the Finemet core may have an Inductance increase as the magnet approaches it as Eric has found. So if we wind the coils like Thane's Lenz free style (high Inductance) then the bonus maybe that we may need much less turns (wire) as the Inductance could be boosted by the Finemet core and magnet combination. In this case we would win big time as the coils would output much more current and have no Lenz effect under load.

What do you think?

Thanks for your time

Luc

Hi everyone,

for anyone is interested, I started a topic with a video demo on testing cores that increase Inductance from a PM field.

Link to topic: http://www.overunity.com/index.php?topic=11377.new#new

Luc

Hi mariusivic

thats a great video with very dramatic speedup too -

can you convert the output of the generator coil being shorted into DC with a single diode, and also try a half-bridge (two didoes) and also a FWBR too,  then try it into a heavy resistive load simulating a shorted-conditon, and see if you can get speed up when its rectified to DC? 
also, can you try a transformer into a heavy load, both AC load and a DC load too? and see it that gives the speed up too....seem seems like looper isnt too far away if you can convert a lot of these coils to DC and fill big DC cap that runs the motor...