Interesting experiment with an transformer, 2 lamps, diodes and an magnet

[PaulLowrance]

Hi Jdo300,

Thanks for the reply. The forum does not allow .FEM files so I renamed it to EM2.txt  You can rename it to EM2.FEM

It seems that if I use the "snap to grid" then the problem goes away, so far. Knock on wood!

The attached file freezes with my FEMM 4.01, but if you realign all points to the grid then it seems to work. Do you think it's just my version of FEMM?

Thanks,
Paul

[PaulLowrance]

I spoke too soon. All the dots are snapped to the grid, but it still freezes. See the attached file EM2b.txt

Paul

[MeggerMan]

Hi Markus,
I wish I had your scope, well done on the results.

So your best results so far is 42% output from 100% input.
But if you can get your circuit up to say 85 to 90% output and then introduce the magnet, then I think you may be on to a winner.

I am sorry I have no results yet, hope to do some testing Friday afternoon (finish early on a Friday).
First test will be to get to 85% using a step-up DC-DC converter and toroid then move on from there.

Just tested my dc-dc circuit at 154mA and managed 82.4% but there is very little change with the PM added.

Regards

Rob

[z_p_e]

Markus,

I have done extensive work on the design of coil pulse drive circuits for pulse motors, and have found that the cemf spike you are capturing and trying to make greater than your initial input power is only good for about a 64% return. However, you have to remember that you are also doing work with the original coil pulse, and the cemf spike is essentially free.

If you monitor the input coil current, replace the cemf bulb with a short, then monitor the cemf pulse current, you will see that the two peak currents are almost identical, however, the pulse duration of the cemf pulse will only be about 64% the length of your input pulse. This of course assumes that your input coil current has not "plateaued" and is still rising before you turn off the current.

I would suggest you try this (shorting out the load) and confirm the 64%, then apply your magnet and see if you can stretch the pulse out again to exceed the 64%. You should also see that the peak currents are equal in amplitude.

Why not do some work with the input pulse such as driving a pulse motor? Then capture the cemf spikes to step-charge a capacitor to ~40V (assuming a 12V battery), then discharge it into a second battery and repeat. Bedini claims this will re-charge a spent battery before the first battery dies, which implies you can continuously rotate the batteries and run your pulse motor for as long as you want.

z_p_e

[PaulLowrance]

Hi Paul,

I use FEMME all the time to do permanent magnet motor simulations and coils setups. If you post a copy of the .fem file, I'll be glad to take a look at it to see why you are having problems.

God Bless,
Jason O

Hi Jason,

I'm just wondering if you had a chance to try my FEMM files that I posted yesterday?

Paul