The first file show the system (really simple...)

Second file is a zip which contain 2 FEMM files like that it's possible to test.

AZ4 file show the system at start, move iron down and recover energy (the force is always down from start to end position), AZ5 show the system at end. The magnetic energy go up at final.

In fact, I don't need 2 coils only one. The result is the same, the force is down and the energy go up. Take one coil with current in it, the energy is bigger with iron around.

Could you explain in words what it is that you're showing here?
What is FEMM files?
Thanks.

Femm files are files created by GNU software FEMM: http://www.femm.info/wiki/HomePage, this software is good enough for test everything in 2D like Ansys Maxwell or others simulation software.

With one coil it's possible only with the software not in reality because if we have a positive current we have a negative current. So the first drawing with 2 concentric cylindrical coils and semi cylindrical iron can exist in reality. When I simulate I have energy from move iron and I have more energy from magnetic field. With other system when we recover energy from iron we lost energy from magnetic field, not here. I think the geometric shape is special but I don't understand exactly what happens.

You can test files if you want it's not difficult.

So this is a simulation in a program you're describing then, nothing you've build in real life?

Before test I prefer see if I'm right in theory, if there is no error I will test it. I need materials for test that I don't have. Have you ?

Quote from Fplg1 on November 8th, 2012, 04:45 AM

Before test I prefer see if I'm right in theory, if there is no error I will test it. I need materials for test that I don't have. Have you ?

Have I what?
Have I built it or have I the material for it?
If you could explain just what it is that you're about to build then maybe I could
give you some advice on it, whatever it is.
I still don't have the slightest clue as to what it is that you're looking into building.
Is it some form of transformer or what?

Just need a source of current, 2 coils in copper cylindrical (one big, one small) and a half cylindrical iron like first message show in the image (it's a cut view). It's not a transformer. It's only for test if the practice is like FEMM software say. The goal is to find the energetic efficiency, if efficiency > 1...

Cycle:
1/ Place iron like first figure show between two coils
2/ Put current in coils, measure the energy in system
3/ Move iron down and see if force is down
4/ Measure the energy in system, it must be greater than step 2 if efficiency is > 1

don't hesitate if it's not clear
thanks if you can test it ;)

Good luck!

Quote from Lynx on November 8th, 2012, 09:44 AM

Good luck!

This reminds me of my idea to make a coil diode. Presuming that the inside coilcylinder is just of the right sizes and just placed in the right position.

It grounds on the assumption that the inside coil won't react when the flux of the outside coil is like a homogene field to it. As many fieldlines inside the innercoil as outside it..so no change in flux, so no induction.

The other way round the outside coil will always react on the innercoil changings in current hight or direction.

Thus making a diode that can take a very high current for a small price.... (C)

Quote from FaradayEZ on November 21st, 2012, 12:39 PM

Quote from Lynx on November 8th, 2012, 09:44 AM

Good luck!

This reminds me of my idea to make a coil diode. Presuming that the inside coilcylinder is just of the right sizes and just placed in the right position.

It grounds on the assumption that the inside coil won't react when the flux of the outside coil is like a homogene field to it. As many fieldlines inside the innercoil as outside it..so no change in flux, so no induction.

The other way round the outside coil will always react on the innercoil changings in current hight or direction.

Thus making a diode that can take a very high current for a small price.... (C)

Is that what the OP is trying to explain here?
Sorry for the silly question but I still haven't grasped the purpose of the OP.
Thanks.

Quote from Lynx on November 22nd, 2012, 12:47 AM

Quote from FaradayEZ on November 21st, 2012, 12:39 PM

Quote from Lynx on November 8th, 2012, 09:44 AM

Good luck!

This reminds me of my idea to make a coil diode. Presuming that the inside coilcylinder is just of the right sizes and just placed in the right position.

It grounds on the assumption that the inside coil won't react when the flux of the outside coil is like a homogene field to it. As many fieldlines inside the innercoil as outside it..so no change in flux, so no induction.

The other way round the outside coil will always react on the innercoil changings in current hight or direction.

Thus making a diode that can take a very high current for a small price.... (C)

Is that what the OP is trying to explain here?
Sorry for the silly question but I still haven't grasped the purpose of the OP.
Thanks.

No i don't think so, but i agree its not so clear what is mentioned here.. that's why it made me wander to my own thoughts..lol

So please more info, patents, video an the rest to grasp what is going on... and the purpose of the device.