Auroratek demonstration from Bill Alek at TeslaTech conference

[Nali2001]

Yes although the rotor is just steel, it carries a good amount of residual magnetism after each attraction cycle over to the next pole alignment. Making the rotor more or less act as a rotating permanent magnet.

[G4RR3ττ]

Yes although the rotor is just steel, it carries a good amount of residual magnetism after each attraction cycle over to the next pole alignment. Making the rotor more or less act as a rotating permanent magnet.

Assuming there is some small residual magnetism in the rotor, one would think that to be the result. However, experiment shows this to be incorrect. Just rotate the rotor with a voltmeter across the stator windings and see what happens. You will not observe any induced voltage with the EXACT circuit I have described and shown. I've done the experiments have you? If you hook the rotor windings up to a current source and turn the rotor by hand, you will observe that the changing inductance causes a voltage drop across the motor that is due to the path reluctance varying in time: V_drop = I_cc * dL/dt + I_cc * R_series. THIS HAS BEEN MY POINT THIS ENTIRE TIME. Why people seem to think I'm wrong, when they haven't actually done the test for themselves, is absolutely astounding.

[Nali2001]

Yes I have some commercial reluctance motors and made some as well

[G4RR3ττ]

Nail,

Well, I happily stand corrected on calling you out for not building! Thank you for the awesome pics, very good builds!

Since you have actual experience with these types of magnetic circuits, have you not seen the affects of the parametric voltage drop I * dL/dt? This was literally what MalarkE has been trying to refute, and I have been trying to point out is a real effect. Otherwise the rest of the specifics are off point.

On a side question, what's the efficiency for mechanical input to electrical output for your generator setups? I only ask as that looks to be what you were going for. My setup was made purely for mechanical work, not generator action using magnets. Also I did test the theory of hooking up a capacitor and getting parametric oscillations, which was very, very cool! It will only work at very specific frequencies, so it throws the whole residual magnetism out the window, since you would see an increasing voltage per speed of rotation which isn't present in the tests I've recorded.

Also, couldn't you have just cut your stator core on one side and placed your magnets in the cut? This seems more effective than the circuit you've shown for generator action: would produce a larger delta in flux change.

Finally, if your still into building these, the best rotor design appears to be Jim Murray's elliptical rotor:

[MarkE]

That sounds rather convenient for you, seeing as how you want me to do all the work. Quite one sided, when you think about it. In reality neither of us has any respectable "authority" on the subject of discussion, or do you claim to have written a book, be a professor, or some other position (a working scientist?) that actually possess any sense of mastery of the subject? And I don't buy "I'm a working engineer," they aren't the people who write in journals or publish books that everyone else uses as reference material. Experience is one thing, but it doesn't convey complete authority that you are above doing your own work and showing it. Also, lighten up man, your writing style is borderline Aspergers.

It should be convenient to everyone.  You have what you tested.  You have suggested that it reflects what is going on with Bill Alek's arrangement.  I suggest that it does not, and that a specific change in your arrangement to make it more like Bill Alek's physical set-up will show that the behavior changes to much more like what I contend is the behavior in Bill Alek's arrangement than you do.  You have complete control over the experiments.  And, since you are using the same materials it would be an apples vs. apples comparison.  My suggestion implies that I trust you would be honest in your measurements and reporting.  If I conduct the experiments with cores here, then to be fair, we have to start with an arrangement like yours, establish that it does or does not reproduce your results, and if not why.  Then we could move to reproducing something more like Bill Alek's three core, three winding set-up.  If there is some good reason why you don't want to take your transformer apart, then just say so.  I am interested in getting at the truth, and if that means that my expressed opinion is mistaken, it will be no skin off of my nose.

I have not attempted to argue from authority.  Reject arguments that I haven't offered to your heart's content.  If you enjoy slaying men of straw, then so be it.

I have suggested direct experiment to resolve what is real and what is not. 

I am afraid that I am not a student of Asperger's as a writing style.  If there is something that you find inappropriate about how I write, then I am afraid I will need you to be more specific and direct as to what it is before I could possibly address it.