Can someone confirm this in FEMM?

[robbie47]

Robbie,
I took your script and figured out how to work it, at least well enough to make the changes. It seems to work good, so I will try to graph some results later tomorrow.
Thanks for the help with FEMM scripting.

Hi Lumen,
Good to hear you started to play with scripting.
If you need help, just let me know.
Yes, we would be curious about your desired results, so please post them here.

One remark: in my script at the end the magnets are set to their original position, but there is a small bug. For some reason Femm not always performs the last step when using the 'for do end' commands.

[lumen]

Well, according to FEMM 4.2, this procedure is all gain. There must be some problem somewhere in this that I missed so I am posting the FEMM setup and the script to make the moves and write the data. (Thanks to Robbie's help with the script)

The picture shows the starting position and these are the moves.
1: The lower small magnet rotates into position and pulls itself in.
2: The large magnet slides to the right .55" and does this by itself.
3: The lower small magnet rotates away from its position and is now pushed away.

If at this point the lower magnet's polarity was changed, it would again pull itself in and the process would reverse all in a gain direction.

The original concept was to have the the lower small magnet slide into position in the in/out screen direction but this cannot be confirmed in the 2D software so the insertion was changed to a rotate which also seems to work.
The rotate makes it harder to build a device to test the process.

[broli]

I will ask again. Make a visual presentation of the whole process. I have no clue what you are showing or saying.

[lumen]

I agree, the concept is a bit difficult to follow in the previous posts.
These pictures indicate the operation steps in the FEMM script posted and should also help in understanding the posted data.

[the_big_m_in_ok]

broli said:

I now want to confirm it's not the software giving me wrong results by having someone else confirm the data in FEMM.

You remember the old fashioned steam locomotives more that 100-125 years ago?

Go back to your drawing, take away one of the stationary magnets and place the other with the red end poing to the red end of the moving magnet.
The moving magnet should be inside a lubricated conduit so it can slide back and forth.
As it's pushed toward the other magnet's identical end, magnetic repulsion forces it away, until a spring arrangement along the centerline of movement pushes it back---just like a steam locomotive axle drive.
It's OU and it should beat Lenz law limitations, since there's no coil(s) to deal with.

Your software is correct in determining OU---it is OU.

--Lee