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Author Topic: Mechanical Resonance (Projects)  (Read 29269 times)

Offline MagnaProp

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Re: Mechanical Resonance (Projects)
« Reply #75 on: April 19, 2016, 01:26:45 AM »
Below is a video demo I did 7 years ago demonstrating that a magnet vibrating or oscillating at the same frequency as the coil will cause a reduction in power consumption...
Nicely done.

I recall this video by woopy. What happens if we get your magnet and throw some metal chunks in there to vibrate around as well?

Fast forward to 2:22 in the video...
https://youtu.be/mLK1VG8h2Wc
« Last Edit: April 19, 2016, 06:03:31 AM by MagnaProp »

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Re: Mechanical Resonance (Projects)
« Reply #75 on: April 19, 2016, 01:26:45 AM »

Offline Magluvin

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Re: Mechanical Resonance (Projects)
« Reply #76 on: April 19, 2016, 03:10:55 AM »
This test was carried out to see if it is actually the oscillating magnet that is creating most of the current flow in the secondary,or the field distorting the field of the primary.

I added a diode in series with the FG output and primary coil to chop the bottom half of the AC.
The schematic below--not sure of dot convention,or how the common ground between my FG and scope will affect the seen results--but they are clear.

The first scope shot is with out the magnetic oscillator in play,and the second scope shot is with the magnetic oscillator in play.
As we can see,it is the oscillating magnet that is inducing the bulk of the EMF across the secondary/resistor combo.

My next goal is to get the 1:1 transformer wound,and also to set up the laser timing to see where the magnet is in relation to the primaries current flow.


Brad


Excellent test. ;)

Does loading the sec affect the primary with the magnet in play? Just wondering as it may play out differently if the primary and sec were not wound over each other, as in putting the sec on the other side of the magnet to isolate its affect on the pri.  If winding the sec over the pri and loading the sec further reduces the primary input, then it is good as is. ;D

Thanks for all your time with this Brad. ;)

Mags


Offline Magluvin

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Re: Mechanical Resonance (Projects)
« Reply #77 on: April 19, 2016, 03:18:28 AM »
Below is a video demo I did 7 years ago demonstrating that a magnet vibrating or oscillating at the same frequency as the coil will cause a reduction in power consumption. In my case 3 times less power at the maximum frequency of 160Hz.
There is a limit to how far you can increase the frequency, which I think is caused by the friction or losses the magnet experiences while in oscillation.

Quite sure this is part of what is going on in Brad's tests as far as input power reduction.

Link to video: https://www.youtube.com/watch?v=J2qVcwJN9hY

Luc

Hey Luc

Nice vid. It seems to be conclusive that if we power a coil with ac, that introducing a magnetic motoring portion that the coil drives, that the input seems to be reduced, whether it is a rotor, a vibrating magnet or as you have shown.  ;)

So as we go along this is something we should expect and strive to improve on as part of increasing efficiency. ;)

Thanks for bringing it here.  ;D

Mags


Offline telecom

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Re: Mechanical Resonance (Projects)
« Reply #78 on: April 19, 2016, 09:49:04 AM »
This test was carried out to see if it is actually the oscillating magnet that is creating most of the current flow in the secondary,or the field distorting the field of the primary.

I added a diode in series with the FG output and primary coil to chop the bottom half of the AC.
The schematic below--not sure of dot convention,or how the common ground between my FG and scope will affect the seen results--but they are clear.

The first scope shot is with out the magnetic oscillator in play,and the second scope shot is with the magnetic oscillator in play.
As we can see,it is the oscillating magnet that is inducing the bulk of the EMF across the secondary/resistor combo.

My next goal is to get the 1:1 transformer wound,and also to set up the laser timing to see where the magnet is in relation to the primaries current flow.


Brad

Hi, can you further decrease the input by making a pulse instead of a sine wave?


Offline tinman

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Re: Mechanical Resonance (Projects)
« Reply #79 on: April 19, 2016, 02:43:27 PM »
Hi, can you further decrease the input by making a pulse instead of a sine wave?

That is my very next experiment.


Brad

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Re: Mechanical Resonance (Projects)
« Reply #79 on: April 19, 2016, 02:43:27 PM »
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Offline Johan_1955

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Re: Mechanical Resonance (Projects)
« Reply #80 on: April 19, 2016, 05:56:38 PM »
Maybe the travel will not be enough?
Maybe a magnet on a wine glass :o lol
Sorry,couldnt resist that one.
Brad

Brad, but that is maybe the classe difference, this is a nice satire!

Tired, mine Grammar is ............

---------------

Maybe you're I stick and driven like you do, is perfect!

And 6 pcs more left beside the I stick, and also 6 pcs more Right beside your first I stick.

North-Poles on all 13 sticks UP, related to diameter, bit to close together, so magnets FIELDS bounce, figure from the eagle view is a non-triggered flat wave sinus moving, serpent?

The middle one I stick, is driven like done and the rest follows.

Bit like out of mine example: With the protective people surroundings from the BAD actor Royal-BBC, when they follow resonance, than let them also help to drive 13 coils above the N or South pole.

Regards, Johan

Offline diegra

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Re: Mechanical Resonance (Projects)
« Reply #81 on: April 20, 2016, 12:16:29 AM »
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Offline Magluvin

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Re: Mechanical Resonance (Projects)
« Reply #82 on: April 20, 2016, 01:43:29 AM »
https://www.youtube.com/watch?v=PGLkwymPqEE

Hi Diegra

Very nice video!!  ;D ;)   Thanks for showing.   ;)   Nice place to work also. ;)


Mags

Offline Magluvin

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Re: Mechanical Resonance (Projects)
« Reply #83 on: April 20, 2016, 04:00:33 AM »
Here is scope shots of repositioning the coils closer to the magnets. The first is what was in the last video going almost full swing, limited to 1v ac in. The Yel trace is the drive coil and the blue trace is the pickup coil on the left. The second pic is using 3/4x1/2 in n52. The blue trace voltage is the same as the input, just a little thinner. Not bad for an inefficient path for the magnets flux to the coil. ;) The blue trace is pretty low with the coils out where they were. The big mags help some, and removed one of the 3/8 from each side also.

Gotta work on a better mag/coil config. ;D

Mags

Offline massive

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Re: Mechanical Resonance (Projects)
« Reply #84 on: April 20, 2016, 10:07:33 PM »
modern speakers are moving coil type over stationary core/magnet,
previous speakers were moving armature like shown in above pic

celestion , moving iron balanced armature patent  : #230,552 = 1925 ,  #245,704 = 1926

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Re: Mechanical Resonance (Projects)
« Reply #84 on: April 20, 2016, 10:07:33 PM »
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Offline Johan_1955

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Offline tinman

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Re: Mechanical Resonance (Projects)
« Reply #86 on: April 21, 2016, 02:59:28 PM »
Well it's throw out week around our area,and i managed to pick up 3 more smart drive washing machines.
Now have all the copper wire i need for up and coming experiments :)



Brad


Offline tinman

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Re: Mechanical Resonance (Projects)
« Reply #87 on: April 21, 2016, 03:17:43 PM »
Speaking of resonant wave's,here is a little circuit i was fooling around with many years ago

Check out the wave form lol.

https://www.youtube.com/watch?v=AmR_Sqw7wv0

Brad

Offline Magluvin

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Re: Mechanical Resonance (Projects)
« Reply #88 on: April 21, 2016, 07:04:03 PM »
Im here at lunch break and adjusting positioning of the coils.  Still more positions to fiddle with, but Im finding it to be getting better as I go. The 2 coils are both 4ohm.

Im getting to where it is exceeding expectations between the in and the out.  If it were just the 2 coils face to face, I would expect less voltage from the pickup coil with simple induction. Very inefficient coupling. And even if the coupling were very good, I would expect only as much voltage on the pickup/secondary as I put in the primary drive coil. But here the pickup is kicking butt.  No loads yet. But I want to see how far I can get with this to see how much more voltage I can get out of the pickup vs the drive voltage. So far, 2 identical coils with just straight AC input, we are seeing it as a step up voltage converter.  I am very happy with that. ;) ;D

Mags


Offline Magluvin

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Re: Mechanical Resonance (Projects)
« Reply #89 on: April 21, 2016, 11:15:53 PM »
One good reason I am happy with todays results is the fact that we know the eff of use of the mags and coils is low.  So now, if I just worked on improving the input eff on the magnetic interaction, at the same input, my output will be more. That test above is 40mw input.  Then improve the pickup side eff, i think it will be a good thing. ;)

The other day when I had gotten near equal voltage on the output was encouraging with the low eff setup. I was thinking, it has to get better due to just the thought of low eff of the magnetic couplings. Soo there it is. ;)

Moving forward....

Mags

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Re: Mechanical Resonance (Projects)
« Reply #89 on: April 21, 2016, 11:15:53 PM »

 

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