Resonance Circuits and Resonance Systems

[Magluvin]

Springs are not linear. Their tension increase with amplitude.
If you pluck a gitar string very hard, you can hear that the pitch start high, then it pitch down as the amplitude decrease.

Ah ok. Well its really noticeable with the magnets.

Mags

[Low-Q]

The magnets are attached to a very short suspension. If you use a coil spring, the length of the steel is much longer, and the ratio between excursion and total length of the spring material is very small. Then you will notice much less difference in resoance frequency vs amplitude.
That's one of the reasons why guitars with longer necks sounds better. Less pitch distortion and longer sustain.


You will notice that the amplitude decrease when you load the second coil. At the same time, it is required more current to run the driver coil because back emf is less. There are actually no gain in a resonance. It's just a "standing wave" that occurs in low loss systems. The wave will be weaken as you introduce any form of damping or load. A load of the second coil is acting like a shock absorber which limits the amplitude - and the very reason why cars with damaged absorbers are like playing with life while driving.
However, the shock absorber also take energy from the engine when driving on bumpy roads because the suspension is not a low loss resonance system that could bounce the car in all directions while driving.


Vidar

Ah ok. Well its really noticeable with the magnets.

Mags

[lancaIV]

guitar strings :
The Windbelt is a wind power harvesting device invented by Shawn Frayn in 2004 for converting wind power to electricity.^[1][2] It consists of a flexible polymer ribbon stretched between supports transverse to the wind direction, with magnets glued to it. When the wind blows across it, the ribbon vibrates due to aeroelastic flutter, similar to the action of an aeolian harp. The vibrating movement of the magnets induces current in nearby pickup coils by electromagnetic inductio

shock absorber :   http://www.idtechex.com/electric-vehicles-europe/show/en/

[Magluvin]

Here is another advantage that can be had by adding more drivers to increase efficiency and does this apply elsewhere with other devices, motors, etc....

When we measure the output of a speaker, by the standard db @1meter, then we double the power in, we increase 3db.
96db@1w
99db@2W
102db@4w
105db@8w
And so on up to the limits of the speaker. ex  126db@1024w

The first pic shows this in a graph.

Next we increase the number of speakers and we increase the power accordingly. We increase 6db when we double the number of speakers and power accordingly

1 speaker 96db@1w
2 speakers 102db@2w   1w each speaker
4 speakers 108db@4w   1w each speaker
8 speakers 114db@8w   1w each speaker

Shown in second graph depicting 100w up to 400w. Same increase for doubling speakers and power for each.

Notice the difference between the examples above. In both situations the power was gradually increased, but by also adding more drivers we get another increase of 3db more for each doubling of total power. Where did this increase come from?

The last graph shows just a doubling in the number of drivers. With only 1w total going in, we increase 3db by increasing the drivers while redistributing the 1w total power divided between the drivers.

1 speaker @1w 96db
2 speakers @1w 99db  .5w per driver
4 speakers @1w 102db  .25w per driver
8 speakers @1w 105db  .125w per driver

   Its real.   

So just by increasing the number of drivers with the same total input, output is increased. So Im in the belief that more coils and magnets on a pulse motor should increase eff, not just increased output per input. This is something that needs to be seriously looked at.  Like if we had 1 electric motor driving only 1 wheel of a car, would adding another motor to another wheel not only increase go power but also increase eff??  Add an electric motor to all 4 wheels, would it be more eff than just 1 motor or just 2 motors?  As of yet before testing it, Id say there is a good chance it may be possible and nobody has really tried it in tests for eff. And if there are some here that object to that possibility, then explain why the gain in eff I have shown here only apply to speakers and not anything else.

Mags

[Belfior]

couple days ago they announced the finally succeeded in converting light signals to sound, storing it and then converting them back to light. Easier to manipulate sound than light.

It seems this is a major break through in communications http://www.iflscience.com/technology/scientists-have-managed-to-store-light-as-sound-for-the-first-time/

I think they are trying to steal my light-electricity-sound valves!

Last time I had a good idea I didn't follow through and now it got sold to Germany for 5 million This idea was paying for pizzas with SMS. At that time only thing SMS was used to pay for was background images for mobile phones and ring tones.