Mechanical Resonance (Projects)

[gotoluc]

Well here is my latest test on the magnetic mechanical amplifier.

Just finished putting the 13 watt amplifier together as well for the larger version of this device.
It seems the higher i can go in frequency,the better the effect.
Will keep things up to date in this thread.

https://www.youtube.com/watch?v=mlb79xSh93w

Brad

Nice demo as usual Brad

It's always interesting to see such a stiff metal bar move so freely when it hits resonance.
BTW, is the frequency you're driving it happen to be the same frequency as the bars natural ringing resonance like if you hit it with the side of your screw driver?

Thanks for sharing

Luc

[Magluvin]

 

Well here is my latest test on the magnetic mechanical amplifier.

Just finished putting the 13 watt amplifier together as well for the larger version of this device.
It seems the higher i can go in frequency,the better the effect.
Will keep things up to date in this thread.

https://www.youtube.com/watch?v=mlb79xSh93w

Brad

You are the man.     Thanks for continuing on here. I have some brackets to make for my coils and Ill be Wiggin and a waggin too. 

After watching your vid I thought of things.  Like say if we were to just use a coil to distort the field of a stationary magnet so that the magnets field, changing because of input to the first coil, induces a second coil.  We would get about as much in the second coil as if Brad were to change his input freq so the pendulum is not in resonance.  Not much efficiency there. Because the magnets field is not resonant.( or can it be???) We would be only moving its field in a lossy way.

If we look at the movement of the pendulum say at 30hz, there would be a big difference in that movement if it were not the resonant freq. So say out of resonance the pendulum moves back and forth 1/8in for example at 30hz, then we could calculate the speed of the magnet per that distance and time. Now if we have the same but at resonant freq, there is much greater distance of travel, and according to Brad, there is a savings in input when operating at resonance. So at 30 hz and in resonance, the magnet reaches end to end of throw at much greater speeds, giving faster flux cutting of the second coil thus more output than without resonance.

Like I said earlier, I sometimes dont have time for projects. And for about a week I had a lower back prob. Hard to put your socks on pain. But feeling much better today. Double dose of raw milk yesterday.

Mags

[Magluvin]

Just wrote a decent size post and hit send and Unable To Connect comes up and lost my text.    Happens a lot for me here. Then I can get back on after a few min.

Anyway, here is my coil setup. Gotta git

Mags

[Magluvin]

What Brad was saying about better efficiency at higher freq of resonance seems to hold true for switching power supplies also, from what Ive been reading lately.
Just another chunk of knowledge for the efficiency gain basket of things to think about in our builds.


Mags

[tinman]

Just wrote a decent size post and hit send and Unable To Connect comes up and lost my text.    Happens a lot for me here. Then I can get back on after a few min.

Anyway, here is my coil setup. Gotta git

Mags

Hey,nice shinny setup there Mag's

I too have the very same problem,where i hit send,and i get error 500-website not available. If i back click,it will return to my post i was writing,and so i just highlight my post,copy it,and then refresh page,and try again lol.

Yes-the higher the frequency,the better the efficiency. This is also the case without the oscillating magnet,but adding the oscillating magnet at any frequency would increase the efficiency again.

When you talk about using another coil to redirect the PM's field,the first thing that comes to my mind is the MEG,as that is exactly what it dose--uses a second coil to redirect the PMs field into a drive coil--or main coil.

Problem with that is,we use extra power in the deflection coil,where as the oscillating magnet is driven by the primary coil,and as we can clearly see in the video--it takes no energy to do this--apparently ,as the P/in go's down-not up,and the P/out go's up-not down

Out of resonance,and the P/in and P/out go back to the same values than that as if the oscillating system was not there.

Next i am going to use a laser to find out where the magnet is in relation to the primary coils magnetic field. I want to find out what kind of interaction the PMs field is having with the primaries field. I have this feeling that some how the PMs field is leading that of the primaries field,and this is how the secondaries EMF phase is able to come back into phase with the current of the primary,and not 90* out as it should be --we will see.


Brad