How to move modulation magnet with ease in CIMFSM

[petersone]

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

[gyulasun]

....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

[petersone]

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

[Paul-R]

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.

[petersone]

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