Muller Dynamo

[itsu]

Hi all,

just a correction on my previous post/video (http://www.overunity.com/index.php?topic=3842.3830)

i was measuring the current on the wrong place, so now i DO see the 90 degrees phase shift (current lagging behind).

Also we are still in resonance, speeding up under load/short.

New video to be seen here:  http://www.youtube.com/watch?v=yNtnLAVk9Og


New puzzle for me:  according to the theory, when in resonance, we should have NO phase shift!!

Regards Itsu

[bourne]

Borne   
Thanks again.   No hurry here also.   I am still waiting on many parts from China.. ordered thru Ebay. 
But I got very good prices and low to no shipping fees... haha. 
I also ordered a base unit from ClanZer... it may be here before my other parts at this rate.  ClanZer's rig looks to be very cool for experirments.  He may have an add-on for the Muller rotor soon. 
My rotor has bit of wobble... but I can still do some testing until I get some good quality built rotors from ClanZer.   

Bill

Bill

I ordered my halls from a Hong Kong Ebay supplier a few weeks ago, only took a few days to arrive in the UK which surprised me so hopefully you will not have long to wait.

Congratulations on getting in the queue for Clanzers rig, it looks much too useful for the price

If you have a wobbly rotor, like I did, get some plastic shaft collars (pic below). These are from http://www.ruland.com/

Cost about £3.50 each and totally sorted my small wobble problem.

all the best.

[lumen]

...however, I'm still not sure that Romero's gen is "only" a resonant tank.

I agree, with the large change in RPM that Romero has shown, it would be impossible.

[xenomorphlabs]

Hi all,

just a correction on my previous post/video (http://www.overunity.com/index.php?topic=3842.3830)

i was measuring the current on the wrong place, so now i DO see the 90 degrees phase shift (current lagging behind).

Also we are still in resonance, speeding up under load/short.

New video to be seen here:  http://www.youtube.com/watch?v=yNtnLAVk9Og


New puzzle for me:  according to the theory, when in resonance, we should have NO phase shift!!

Regards Itsu

Itsu,
please keep up your experiments and videos.
Very informative and with clear approach.

It seems you experimentally confirmed here,
that the current lag is what causes the speed up.

Did you try out series resonance as well? Would be interesting to see
how current shifts there and if the motor would also speed up.

[rogla]

I think Bolt is right in what he is trying to tell about the phase shift. This thread has been an  real eye opener for me, many good here.

I made a Maple worksheet to be able to get a feeling about how diffrent parameters affect the phase shift. The calculated values are probably not correct but the model gets me a good understanding about the big picture.

One intresting conclusion is that the phase angle between voltage and current does not depend on the coil length at all.

Another is that the operational speed has to be quite far away from resonance.

And larger dimensions on core diameter, wire diameter and coil diameter increases the phase angle.

Low values of the capacitance increases the phase shift if the operational speed is below resonance. With aircore and dimensions similar to Romeros I get in the ball park of max 50uF to be near 90 degrees at 1200 rpm. Appended is a printout as an example.

But I wounder, doesn't the coil 'see' the large cap on the other side of the FWBR?
In that case there will be no speedup.

Also, may be the coil can have to large capacitance that limits the system to operate only at a very low speed (or extremely high) with phase shift.

Also, in inductive 90 degree phase shift, as far as I can see it, it still will be drag (Lenz) between 90-180 degrees and 270-360 degrees. I think the coil should be shorted actively under these phases, but not else.

I'm ready to start a build now. I will use a RC motor and one coil only to test things out first.
Probably will use a microcontroller (I'm a software developer...).