Muller Dynamo

[mondrasek]

Data for one "backing magnet tuned" gen coil pair (running in normal gen series mode) with a small incandescent lamp load while sweeping RPM via Vin control to the drive motor circuit.

Check out the sweet natural resonance frequencies (of the mechanicals)!  I am very pleased with this graph!

Now to add a second coil pair.

I still had problems taking readings of Vin and Iin when the RPM was high (>1800 RPM) and still think this is due to the DMM probes acting like antennas for RF being tossed by the collapsing coil EM field.  Hopefully this induced "noise" appears only at those higher RPM frequencies and does not appear in lower frequencies as the additional coil pairs are introduced.

[mondrasek]

The single coil pair in the previous testing was "tuned" via the addition of backing magnets at the best distance to maximize Pout vs. RPM drop that I could find easily (waaaay more exact testing would be needed in this area).

The unloaded Vout of this single pair into the Dump Cap reads 16.63 V.

Attaching the next "un-tuned" pair in parallel caused no significant improvement in Vout or Pout.  Why?  Because the second "un-tuned" pair was giving out only 13.55V and so would never overcome the Vout provided by coil set number one to the Dump Cap.  If it does not match or exceed the same Vout of the other coil pairs, it can never provide current to the Dump Cap.

So I am trying to tune coil pair No. 2 up to the same 16.63V range.  Unfortunately I am now out of the same types of backing magnets used on the first coil pair.  But I am improvising (as Engineers do) and should be able to get at least some results, if not fully optimized results.

Milehigh has been giving Sage advice via his youtube account route to my email.  He seems to be a very knowledgeable individual who has the understandable (at least to me) frustration of seeing too much mis-measured and misrepresented data presented.  I too have that frustration and that is the reason why I began building this project:  I was not getting the accurate data that I wanted in order to understand this system.

So I think Milehigh and I are at least in agreement that we all need to measure and present data accurately, including testing methodology.  And if we are challenged by others who disagree with our methods and/or findings, we must present more supporting data or agree to correct our erroneous methods.

Edited to add:  With no bruised Egos!  This ain't about you! (kill the Id)

M.

[mondrasek]

First attempt at getting the second coil pair up to the same Vout as the first (16.63 V) was not successful.  I was only able to reach 16.03 V on the second pair, no matter what I tried, with the backing magnets that I have on hand.

So I either need to drop ~$80 on backing mags (and wait for delivery), or figure something out. 

I am thinking to de-tune coil pair No. 1 from 16.63V down to the 16.03V range just to compare results.

Capeesh?

M.

[wattsup]

First attempt at getting the second coil pair up to the same Vout as the first (16.63 V) was not successful.  I was only able to reach 16.03 V on the second pair, no matter what I tried, with the backing magnets that I have on hand.
So I either need to drop ~$80 on backing mags (and wait for delivery), or figure something out. 
I am thinking to de-tune coil pair No. 1 from 16.63V down to the 16.03V range just to compare results.
Capeesh?
M.

@M

Even though the second coil does not have the same or higher Vout, it is still adding to the available Iout.

Anyways, maybe try this with your gen coils. No more reasons will be given because the result will say it all either good or bad.

Connect top gen coil1 with bottom coil2 to make pair A. Connect bottom gen coil 1 with top coil 2 to make pair B.

Connect pair A to your dump cap. Connect pair B together in a closed loop. Try it. Then change wires over on pair B. Try it. Then add a diode in the line of pair B. Then turn the diode the other way. Then put the diode on the other wires of pair B. Then turn the diode around. Try all those variables to see if something is out of the ordinary. Could be RPM, could be output.

You can also try this with top coils as Pair A and bottom coils as Pair B. Maybe even add a capacitor on Pair B.

Your set-up is not the classic Romero wheel so it is a little difficult to find experiments that will be relative to other builders. 

You should not worry about how much feed energy is supplied. It does not matter if your device is OU or not. What matters is how much and what you can learn from your trials.

But keep in mind that since your wheel is driven with a dc motor on the shaft, (if I remember correctly) you will never have OU. The laws of leverage will kill it way before any OU will be evident simply because you are turning a wheel from the shaft and breaking it on the rotor edge. A break force of 1 on the wheel edge will feel like 20 on the shaft. That's why having the drive coils on the edge where the gen coils are is a minimal requirement to have a chance. The ideal would be drive on edge and gen coils closer to the shaft. This way leverage will advantage the drive coils. The only natural force that can overcome drag is leverage. One way to electronically fight drag is to pulse the output closed.

You could experiment with this if your dc motor could be used as a generator and your outer coils could be used as drive coils, but then you would need a drive coil circuit.

wattsup

[plengo]

Good.  That was the intent (actually I was aiming for "coffee all over keyboard", but not maliciously).

I decided to go ahead and put my 1 Ohm precision resistor in series with the tiny incandescent bulb load.  At full RPM the bulb resistance was calculated at ~118 Ohms, so I think it will do for now.

I'm finding interesting results in running this "backing magnet tuned" single generator pair (normal gen mode) through an RPM sweep with the same tiny lamp load.  If what I am measuring is correct, I have a Pout to Pin ratio of ~1.33 through the entire RPM range.  So output V is then simply a function of RPM and can be set wherever you want by changing RPM. 

If this is scalable, then with a total of 9 coil pairs it would bring me to OU of ~1.2. 

I am looking forward to adding the second pair of coils and tuning magnets to test if this scales 1:1.  It might scale even better than that since having only one coil set creates more cogging than having more equally spaced sets I guess.  But the drag on RPM for the increased output from more pairs is still a major concern.

Thanks for the input.  Always appreciated.

M.

Great work mondrasek, could you post a picture of your setup so that we can see the distance of your coils, rotor and the backing magnets?

I am able to get to 1300RPM now under same old input power and get 6v and 100ma output one pair of coils. All only by changing the distance of coils to rotor magnets and playing with the backing magnets.

One more observation. With one pair generator coil once I had 80ma output but with 2 pairs I had 130ma. If I used coil pair A only it would be 80ma, the other B pair only also only around 80ma and both A and B pairs a total of 130ma. This made me think why the current was not actually adding up? Very strange.

Fausto.