Muller Dynamo

[konehead]

Hi Chalamadad

OK thanks - not sure what to do exactly from your description:
"I shorted from one AC leg to inbetween the two series coils"

so do you have a FWBR across both sereis coils (the two AC legs of it at the IN and the OUT of the two series coils connected together)

and then you "short" from just one of those AC legs of the FWBR to the point "in between" where coil A and coilB intersect? (out of coil and IN of coil B so right in between as you say)

So if this is right, you wll be short circuiting just one of the coils, either A or B, and it is done with "half bridge" - so using just two diodes of the FWBR, since you are using just one AC leg connecting to that center-point in between, and the other coil sill nto be shorted, but the FWBR will still be across both?

THis is what I get from it - is this right?
Does the "pure sinewave" happen at only the time you short circuit one of those coils?
Or is it a pure sinewave only when there is no shorting going on?
Or does it make pure sinewave with either short or no shorting going on,
or did you mean that you really didnt short anythign at all, it makes a pure sinewave, but if you were to short somewhere, or put load on it, that part of circuit between AC leg and center point is where it would go...

also where did you put the scope leads to see this pure sinewave happen?

My plans for this are to do a swtiched-short both at pos and neg peaks of this pure sinewave.

thanks

[xenomorphlabs]

Hmm, pure sinewave sounds a lot like a resonant condition
Chalamadad did you use any series caps?

[chalamadad]

Hi Chalamadad

OK thanks - not sure what to do exactly from your description:
"I shorted from one AC leg to inbetween the two series coils"

so do you have a FWBR across both sereis coils (the two AC legs of it at the IN and the OUT of the two series coils connected together)

and then you "short" from just one of those AC legs of the FWBR to the point "in between" where coil A and coilB intersect? (out of coil and IN of coil B so right in between as you say)

So if this is right, you wll be short circuiting just one of the coils, either A or B, and it is done with "half bridge" - so using just two diodes of the FWBR, since you are using just one AC leg connecting to that center-point in between, and the other coil sill nto be shorted, but the FWBR will still be across both?

THis is what I get from it - is this right?
Does the "pure sinewave" happen at only the time you short circuit one of those coils?
Or is it a pure sinewave only when there is no shorting going on?
Or does it make pure sinewave with either short or no shorting going on,
or did you mean that you really didnt short anythign at all, it makes a pure sinewave, but if you were to short somewhere, or put load on it, that part of circuit between AC leg and center point is where it would go...

also where did you put the scope leads to see this pure sinewave happen?

My plans for this are to do a swtiched-short both at pos and neg peaks of this pure sinewave.

thanks

Hi kone, thought you had peak shorting in mind. ;-) I measured current. See the sketch below. The connection might have been to the other AC leg, don't remember for sure.


Another thing about this: I reread the documents where all the info was collected when Romero disappeared.
Here is what is interesting. Somone was recalling that it was the goal to activate the generator coils at TDC and made a good observation. He noticed that there were just two hall sensors. He asked the following (good) question:

"Quote from: void109 on Today at 06:56:56 PM
Which of those two statements are incorrect? Or both? With a 9/8 ratio of magnets to coils, and
only two hall sensors to set trigger points, I don't see how it is possible for each of the coils to
activate at the same relative position to the nearest approaching magnet. [...]
Wouldn't it be the case that each coil would need its own hall sensor?"


Here is was Romero answered:

"The 2 driving coils are running independently, not activating at the same time, that is what I need, to
have the second coil activating when the other one is completely off."


NOW, when comparing this statement to the actual build (see image below) you will notice that the halls are mounted exactly at the opposite sides to each other. Rotor magnets are symmetrically mounted, this means the halls are firing simultaneously and his statement is not correct. Maybe he thought he would need independently activating the coils for something else. At this stage of development I consider this is key information. What would he need two independent pulses for? Remember this is in the context of TDC coil-shorting. Romero said he found another way of shorting the coils. If you take another look at the top driver circuit you will notice that there is a connection from ground to the FWBR of it's neighbouring coilpair. Question: Is it possible he is using the driver hall sensor in such a way that he can use it for generator shorting as well? Maybe forwarding the BEMF to another coilpair like this? Wonder why the cable goes to the coilpair next to the driving circuits coilpair, TDC at this point would be the coilpair below. Or is he simply grounding the DC side?

[xenomorphlabs]

I thought that's what he had the tiny magnets pointing outward away from the axle and glued into the rotor thickness for in the beginning to use them for coil-shorting, but for some reason abandoned.
Not 100% sure, but i think also Romero mentioned that he did not use coil-shorting at all in this device...
Nonetheless is coil-shorting a very viable approach.

[chalamadad]

I thought that's what he had the tiny magnets pointing outward away from the axle and glued into the rotor thickness for in the beginning to use them for coil-shorting, but for some reason abandoned.

Raises another question. Why mounting them in line with the big rotor magnets if - at that time - he thought he would need distinct pulses?

Edit: Okay, this question is bullshit. You can of course choose different reference positions with this setup.