Quote from: neptune on July 18, 2011, 12:30:52 PM
Re the antenna effect , there are two possibilities here . The wire just might be acting as one plate of a capacitor . with the "cyclic " effect , it is more likely to be acting as an antenna
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Does this form a simple ratio to your RPM , or RPMx number of magnets ? This might give us some clues as to what is happening .

good call on the antenna possibility, neptune!

i'm not sure if the following info has been posted before wrt the MD design...

you might be interested to take a look at the details about the Alexanderson Alternator on Wikipedia

it was a motor generator used to create some of the first AM radio transmissions

it's a reluctance motor-gen, with high number of stator poles, and  a slotted rotor disc (instead of mags) which 'chop' the reluctance of pairs of stator coils as the slots pass between the stator coils

the output was formed by paralleling up all the stator o/ps (sound familiar yet?)

iirc max speed was approx 20,000 RPM and the transmitted frequency was given by RPM * No. stator pairs (so high-end LW, low-end MW bands)

apparently there is still one system operational, in Sweden, which is turned on for an anniversary  transmission (Alexanderson's birthday?)


hmmm - maybe Romero was just picking up a radio transmission from his device's soulmate! 


this has been a public-service announcement on behalf of the Swedish Broadcasting Corporation
np


http://docsfreelunch.blogspot.com

This one is for the RF guys.

These are the preliminary results.  Please note that the "Length" entered for the antenna wire is not absolute!  I did not measure the length of the antenna wire initially (I don't have a tape that long).  I will adjust that number to a specific value once I am done cutting down the antenna and can count all the pieces.

This is WAY out of my realm of "expertise".

So talk to me, Goose.

M.

About bucking coils - a FCC engineer told me long ago that if you have two magnetic fields collide or clash, the "big fish" will swallow the "llittle fish" and there will not be two magnetic fields anymore, just the one that overwhelms the other.
So for bucking fields, making hte coils and cores exactly the same is important for instance if you are making a motor that runs on coils vs coils and you want a repulsive smash of the coils and cores to trun the rotor.
If one coil/core is not matched, then what you get is ATTRACTIVE power, not repulsive power...this is interesting since with coil vs manget you have a rotationl-point to pulse coil attractive (leading edge of magnet) and a repulsive (trailing edge of magent)
So, what you can do is pulse coil repulsive point, (talking motor coils now) take out power from JUST ONE coil of the two bucking coils at the attractive point, and during the extraction of power from that single coil there will be a speed-up of rotor, since when you take out power from coil to load, it also adds an attraction-power stroke to the rotor's spin. 
Also with bucking coils, there is "compressed-flux" that shoots out sides of arigap at 90 degrees from the smashing of the two coils/cores togheter...this is wasted power that can be a gain. ("splatter coils" - whole other subject)

In Romero mahicnes I think MAYBE it is important in the gernator coils to match up the smash of fieds of the lower and upper coils and cores to the magnet perfectly with the fields of equal strength (via airgap adjsut) so that you can get the "repulsive" effect in generator coils to happen - and the backing magnets also is an addional push-away too...so the only lenz-lugging to occur is at the approach of magnet to coil and core...core saturates to jsut right level of magnetisim so you get push-away, and then the backing magnet further accelerates the push away and pretty much neutralizes the len-lug of the atracion and if you get it all right there will be acceleration under load.
htis is complate opposite of last lame brain theory to adjsut airgaps so the airgaps jam coils into resonance in place of series caps when you have serei-cancelling mode to coils...but that is "opposite direction" of ways to do it. and why it does it...mabye the two opposites collide so doesnt matter?
Seems to be jsut adjsut tune adjsut tune experiment try not to go crazy or quit before you see it happen.

Great to see Fausto getting twice the amountof power output from the coils with bakcing magnet compared to none at all - this confirms the importance of those...

Quote from: poynt99 on July 18, 2011, 11:29:18 AM
You're getting about 14V @~300mA (4.2W) out with bias magnets, vs. about 2.1W without bias magnets?

I am curious what the difference in INPUT power is for both cases?

Thanks,
.99

Irrelevant now what is the i/p ration .99. I see you drove the questions so that the conclusion is obvious, no OU, YET!!!

I need help here. With your skills I would love to "know" why I have those spikes. Do you? There is nothing special on the circuit or the output circuit. Just magnets passing by a coil with bias magnets behind. One should NEVER have those spikes there, correct?

Now it would be a great moment for us to speculate what could be the reason behind those spikes and ways to test the hypothesis speculated. I still have the motor so good timing now.

Fausto.

ps: .99 forgot to say, thank you for your comments and your inquisitiveness

Quote from: konehead on July 18, 2011, 01:34:13 PM
In Romero mahicnes I think MAYBE it is important in the gernator coils to match up the smash of fieds of the lower and upper coils and cores to the magnet perfectly with the fields of equal strength

@Kone, I am sorry that I truncated your post.  But what you said here is exactly what I am finding to be true.

If you have a top and bottom coil that is not exactly matched wrt o/p power then the coil with the greatest o/p power will "win/rule" and push the appropriate conventional current to the load.

If the individual coils in each pair are matched, the conventional current CANNOT FLOW!  This is because each coil will be pushing equal and opposite currents (which = ZERO current).  So the currents from each coil in a pair will effectively cancel themselves.

But (please, please, please) match the individual coils in each pair exactly.  Do this by wrapping the same length of wire into each coil (NOT NUMBER OF TURNS!  Do it by measuring the length).  Do this by inserting the same type of core material into each coil until they read exactly the same on an inductance meter.

And then notice this:  Even though your set up should not be able to provide current (both coils in series, bucking, right?) it WILL provide current.  And that current must come from somewhere other than our EM theory has taught us.

M.