I have attached a drawing for proof of concept CIMFSM moving magnet assembly.
I show 1/16" in the drawing as a gap, but 1/32" would be much better if you can get it that close.
If the gap is the exact same at both ends of the magnet, then the pull is equal but opposite on the magnet and it will "float" and move with ease.
3D animation of full circle design coming soon.
Thanks,
Butch LaFonte
Hi Butch
I don't know it everybody is watching this,if not they should be,IMHO.
The idea is to get some juice without lenz effect,right?
To draw the wood/plastic up and down the coil,right?
Don't understand why the pm. is shown round in the bottom drawing and square in the top drawing,I must be getting something wrong!!
Look forward to the next chapter.
happy hunting.
peter
Hi Peter,
A cylinder-shaped magnet looks like rectangular from sideviews and looks a circle from top or bottom view?
(And the wood also covers the cylinder sideview a little, making it appear a bit smaller.)
rgds, Gyula
Hi Gyula
I must give this game up!!,if the top pic. is side view of disc mag.then end view would show 180 degrees one pole and 180 degrees another,and why is the wood/plastic not shown end view?
Thanks for your help.
happy hunting
peter
Hi Peter,
I disagree, once the cylinder magnet shown in sideview has its poles lengthwise, then its top view should be totally one of the poles and its bottom view is fully the other pole, no way of half circle for one pole...?
What you think is when a cylinder magnet is magnetized through its diameter but here it is magnetized lengthwise as I can see from Butch's drawing.
I do not get your last question on the end view of the wood/plastic, sorry.
The animation will surely help make all this more understandable.
rgds, Gyula
Hi Gyula
I realized as soon as I posted,it is the wood/plastic rotated 45 degrees,thus showing the end of the mag.not the end of the whole thing,I will write out a 100 times,"must think before I write"
So basically it's the moving mag.going up and down the keeper,if the flux stays in the keeper I can't see much happening,but we wait for more info.
Thanks Gyula.
happy hunting.
peter
Quote from: petersone on June 15, 2008, 06:46:52 AM
....So basically it's the moving mag.going up and down the keeper,if the flux stays in the keeper I can't see much happening,but we wait for more info.
Hi Peter,
OK, now you can step further on to understand how the flux induces voltage in the outside coils when the moving magnet(s) go up and down as you say (or in Butch's drawing to the left and to the right), see these pictures and video listed here: http://www.fdp.nu/shared/manager.asp?d=files\ButchLaFonte\
So whenever you shift the wood rod with the embedded magnet(s), the lenght of the closed magnetic path continuously changes and this changing flux inside the keeper (soft iron) appears as normally changing flux for the coils. Because there is always a closed magnetic circuit established between the fix magnets and the sliding magnets, across the upper and lower keepers, and through the very small air gaps, ok? And it is only the lenght of this closed flux circuit what changes alongside the keepers, and the changing flux cutting the coil wires whenever they pass by.
rgds, Gyula
Hi Gyula
Still not thinking before I write,I meant 90 degrees,not 45.
Studying pics. now,if it helps with lenz it's a winner!!!
happy hunting.
peter
I am puzzled. Is the drawing above part of the CMFSM4 drawing listed
on the FDP site? You mention coils. How does the slider drawing fit in with
other components?
Paul.
Hi Gyula
That's fine what you say,but,if the pm is to move with ease up and down,the flux has to be contained in the iron,yes? It so it will have little effect on the coil,and even if in did,can't see any anti-lenz taking place.
Probably got something badly wrong, as usual
happy hunting.
peter
Quote from: petersone on June 16, 2008, 01:40:26 PM
That's fine what you say,but,if the pm is to move with ease up and down,the flux has to be contained in the iron,yes? It so it will have little effect on the coil,and even if in did,can't see any anti-lenz taking place.
Probably got something badly wrong, as usual
Hi Peter,
No problem, the coil should still pick up the flux change. In a toroid transformer the flux is completely contains in the core, but it is still highly efficient as a transformer.
Larry
Hi Larry
I stand corrected,what about anti-lenz,thats the big one.
happy hunting.
peter
Quote from: petersone on June 16, 2008, 04:26:27 PM
I stand corrected,what about anti-lenz,thats the big one.
Don't know, one can only hope, looking forward to Butch's testing.
Larry