Muller Dynamo

[mondrasek]

Well i guess that is when you really are in series or parallel ADDING config, NOT bucking config.

When I first started testing coil pairs, I built a standard generator config.  The coils added both voltage and current.  Wired in series, with the top and bottom coils in the exact same orientation with regards to top and bottom of the system.

Then I flipped one of the coils in the pair, including how they are wired.  The results are that voltage stays adding and therefore the same as before the flip.  But the current in the flipped coil is now flowing in the opposite direction.  So maybe we need to be even clearer:  The coil pairs are in voltage adding and current bucking configuration.

I believe when changing the wiring as in the most recent testing results in a coil pair that is voltage bucking, and therefor provides nearly zero current (theoretically zero if matched 100%), yet current adding.

Please let me know if I've got this all mucked up.

M.

[xenomorphlabs]

Current flow direction is dependent on the voltage polarity, so you can't add voltages while the currents are subtracted.
I can confirm no voltage and current in perfect cancellation or minimal
in opposed bucking, because you can not get it physically perfectly cancelling.
On a transmission line you can measure at different point and will have maxima/minima of current and voltage at different points, but as i understand it you can measure at any point.
In the case of the out-of-phase generator coils, you have the cancellation at any point in the circuit with a constant phase angle.
So there is something wrong in the hypothesis.

Here a simulation of Toranorod's generator coil set-up WITHOUT the dynamic reaction of the core with an opposing field. (Limitation of used software)

[mondrasek]

So physically flipping a coil AND changing the wiring in effect results in no change?

Well I guess that makes sense.  When I initially tried to set up for bucking I had to mock up some paper coils with polarities marked on the edges so I could see which way I needed to arrange things.  This convinced me that I was currently in regular generator series adding mode and showed me that I could achieve the bucking config I wanted to test by physically flipping one coil.  It did not occur to me that by also changing the wiring I was negating the effect of the physical flip.  Hell, I didn't even need to physically flip them, just change the way they were wired.  That could have saved a bit of time.

So I guess I have not been testing a bucking config after all.  I'll have to consider what to do next.  Since others are testing that config right now, I might play around with the conventional generator set up for awhile longer.  The fact that the "virtual switch" created by the FWBR and Dump Cap appears to be "coil shorting" and results in an appearant phase shift between V and I is still something intriguing.

Sorry if I confused anyone.

M.

[neptune]

@Mondrasek .The resistance of an incandescent lamp changes with temperature, but you sould just put an ampmeter in series with it to measure current , or a multimeter switched to a suitable scale . The meter would have virtually no resistance .Despite my name I was never a seaman , but I laughed at the Semaphore quote !

[mondrasek]

Despite my name I was never a seaman , but I laughed at the Semaphore quote !

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.