Magnet motor idea - again.

[Low-Q]

Vidar,
Placing the color in the slot only shows what you already have.  You need to view this as field lines not as colors or poles.
If you put the end view of the slotted magnet in FEMM you will see the field in the slot flowing in the magnets direction, where the field outside the magnet flows around to the back of the magnet (opposite direction of whats in the slot)

What this makes is a far reaching field and a strong local field in the opposite direction. The problem is going to be moving from the far reaching attract, into the far reaching repel, because the repel influence will be there before you reach the neturalizing slot.

So it will likely repel the junction befor you get to it. I think you can avoid this by making the slot a bit wider and use a smaller magnet that can further hide in the slot from the far reaching repel area.

Or using a diametrically polarized cylinder magnet, where after the attraction when it reaches the neutral point in the slot, you could rotate the magnet 180 and have it repel out another attraction side. It should rotate with no force at the netural point. This will avoid the far reaching repel problem because it does not exist!
This is what you are showing?

Something like that, yes. For example, when the moving magnet is far out, it will be "seen" as a normal magnet that is attracted by the stationary magnet, and the far reaching field will dominate the force between them. And vica versa. As the moving magnet is forced into the slot, the attracting forces will gradually decrease, and finally be zero when the magnets are meshed together.
The far reaching field will still attract to the larger diameter, but the strong local field will repel the smaller diameter. The last field want the magnet to turn 180 degrees due to the repulsive force, but the far reaching field will not due to the attraction.
However, the diameter of the outside part of the moving magnet is larger, so probably the torque required to turn the magnet 180 degrees will probably be greater than the torque inside the local strong field. At the same time, the local force is stronger, and hopefully will compensate for the smaller diameter and its torque.


Vidar

[Low-Q]

True it never hurts to try.
Good luck.

When it doesn't work out as hoped, and you are looking for a new and more promising direction just let me know.

"When it doesn't work..."; Yes, then I will try something new. By experience I know it's hard to trick nature ;-))


However, IF it works, the motor should cool down and require heat from the surroundings to keep going. Maybe this is a new approach to a efficient heat engine with magnets? But then this will not be a selfrunner as I want it to be 


Vidar

[truesearch]

@Vidar:


Sounds like promising experiments    I'm looking forward to what you discover and share with us.


truesearch

[lumen]

Vidar,

I am to busy to work on this at this time but I couldn't resist doing some modeling on this setup. This is what I have found to be the main problem and it should be able to be compensated for.

The field in the gap is very strong and works at close distances which results in a non linear effect where the field outside the gap is large and has a linear effect on a rotating diametrically polarized cylinder magnet.

During rotation at the netural position, the outer field provides nearly constant torque. The inner field's torque drops off quickly during rotation because the poles move from the close tolerance netural position to the center of the gap at the 90 deg. rotation. This loss lets the outer field again dominate the rotation and resist rotation.

I think at this point the solution will end up being the shape of the magnet entering the gap to correct for the loss during rotation. This will probably perform better using a square or an oval magnet, at least for the shape entering the gap.
Once this is corrected for, I see no other problems in it's operation.

I was testing the action as a simple piston configuration with the magnet entering as being pulled into position, then rotated, then pushed away.

[Low-Q]

Vidar,

I am to busy to work on this at this time but I couldn't resist doing some modeling on this setup. This is what I have found to be the main problem and it should be able to be compensated for.

The field in the gap is very strong and works at close distances which results in a non linear effect where the field outside the gap is large and has a linear effect on a rotating diametrically polarized cylinder magnet.

During rotation at the netural position, the outer field provides nearly constant torque. The inner field's torque drops off quickly during rotation because the poles move from the close tolerance netural position to the center of the gap at the 90 deg. rotation. This loss lets the outer field again dominate the rotation and resist rotation.

I think at this point the solution will end up being the shape of the magnet entering the gap to correct for the loss during rotation. This will probably perform better using a square or an oval magnet, at least for the shape entering the gap.
Once this is corrected for, I see no other problems in it's operation.

I was testing the action as a simple piston configuration with the magnet entering as being pulled into position, then rotated, then pushed away.

Thanks for working a bit on this when you have time :-)
I try to experiment with the initial setup - the sliding magnets. Not easy to come to any conclusion yet. I will post a new video of this test this weekend or the first days next week. First I must go buy more of these ferrite magnets (Those you find inside magnetic locks for cabinet doors). They are cheap to experiment with :-)