Muller Dynamo

[Rawbush]

I agree the BH curve might not be 100% exact about at what specific point the reversal is taking place. This is Romero's graph he maybe copied it from somewhere just to get the idea I guess. But to reach saturation the right limit must go even more to the right. Even more as in your sketch. You have to cross the saturation level. This is above the asymptotical top-right.

Then flux density goes down to zero, magnet escapes, core saturation is below saturation again, that means there is flux again, until next magnet is approaching again and saturation occurs again and so on.

I think high voltages occur with the fast switching on/off of magnetic flux generating displacement current.

BH curve is not about polarity. Just about saturation, field strength and flux density. Think about it - if rotor magnet is in attraction is pulled to core at this moment saturation and what we then need is a flip from pull to push. Where should the push come from? Rotor magnet polarizes core to attraction and stator magnets the guys experienced must be in attraction to the rotor magnet. So they are same polarity. In the moment the saturation is lost, the stronger magnets "wins" about the polarity of the core. But how can they flip if they don't oppose? This is controversal. Can you ask "RS" (that's not Romero himself, is it? ) to please draw some sketches what exactly happens each step when the rotor magnet is passing by?

@all who experienced speed up, can you confirm the stator magnets being in attraction to rotor magnets?

On the other hand side - Romero's image shows the rotor and the stator magnets opposing indeed.

Yes, the speed up I get is with bias magnets in attraction. The coils are mounted as close as I can safely (2mm or so). Also this is on a set of gen coils (not drive coils, don't help there). The bigger or more magnets placed would increase speed more, to a point, I have not been able to get it to a no load speed with the magnets.
Peace
rawbush

[scratchrobot]

This is true only if the coils are regular generator coils. If setup in a matter where it is possible to extract energy by displacement current there will be no speed decline and you get extra power out. Your mind is limited to a certain extent unfortunately that is why you are referencing a conventional generator which is not what we want to achieve.

Exactly, I tried also conventional way and then I get mayor drag and my rotor almost stops, I'm trying to position the coil so I get the best charging and less drag. I'm using only small rotor magnets and I think with bigger magnets I get better results.

My advice for anyone who has a complete generator is:

Put all the coils for example bottom coils in place and then one by one tune the top coils in bukking so you get the best output with load and less drag. Then start playing with the extra magnets on the coils.

[mondrasek]

Max RPM (w/ ~62 Ohm load) w/ ~80 cm "antenna" on Vin to drive motor circuit = 1802.
Max RPM without "antenna" = 1830.
Max RPM with all unnecessary test leads on Vin side removed = 1901.
Oh, yeah, those DC lines grab noise.  Shorten them up and/or shield them.

I also tried attaching an antenna to the Vout side and did see an RPM increase at one length and then a smaller increase at a longer length.  I may test that better after cleaning up the rest of my wiring.

Testing with the old radio was inconclusive.  No interference on the FM band while at full RPM.  And the AM did not appear to be working properly as I could not find any stations.  It threw static all the time and I thought I had bursts of louder static as the rotor was allowed to spin up and down through certain RPM bands by removing and reinstating drive motor power.  But I didn't test thoroughly.  Way too hot in the garage to work for more than a minute or two at a time.

Also noticed that the radio had solid state tuner.  Only the amp is tube.  Bummer.

M.

[neptune]

@Mondrasek .I am not sure where you are , but in Europe , the FM band covers 88 to 108 Mhz . It is unlikely your will radiate at these higher freqencies . Try to borrow another radio that covers Medium and Long wavebands . It does not matter if it is tube or solid state . Long waveband is the lowest frequency band , which is probably still much too high frequency , but you may still hear the harmonics . If the output is due to parasitic oscillation , it could radiate at any frequency .

[mondrasek]

@Mondrasek .I am not sure where you are , but in Europe , the FM band covers 88 to 108 Mhz . It is unlikely your will radiate at these higher freqencies . Try to borrow another radio that covers Medium and Long wavebands . It does not matter if it is tube or solid state . Long waveband is the lowest frequency band , which is probably still much too high frequency , but you may still hear the harmonics . If the output is due to parasitic oscillation , it could radiate at any frequency .

Thanks for the feedback and advice.  I'm not sure where I would come up with a radio like you describe.  If you have any specific ideas let me know.

The whole radio and even antenna test was just a side track to check out something unusual while still aiming to replicate RomeroUK's self looper.  And I am glad I did this since it shows how important the shortest DC input lead lengths are to minimize noise entering there.

I plan to get back to testing RPM vs. the low resistance load relationships once I get my circuit lead lengths tightened up.  But I may still investigate how the "antenna" lead seems to help if on the Vout side and at what lengths the effect is maximized.

I'm in the middle of the heat wave moving across the Midwest US.  On my trip I saw temps of 107F while passing through Cincinnati Ohio!  The heat wave will not break until after the weekend so testing will be limited to short outings in the garage.  Taking an RPM reading and then cutting off some antenna or moving the alegator clip on the resistor wires takes about as long as I can stand in this heat.

BTW, for those who are interested, Dr. Turtur posted his design (with drawings) for a device to test as a ZPEC he has derived from theory and experiments.  It shows striking similarities to the R-ZPEC from a concept point of view, if not physically identical.  It was posted here: http://philica.com/display_article.php?article_id=239 only just July 12!

Hopefully someone here will drill down through all the variables and replicate the selfrunner before Turtur does.  It just seems fitting.  But his testing and data should quickly lead to more optimized designs, imho.