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Author Topic: Magnetic shield by use of a second magnet - A better way I think.  (Read 10454 times)

Offline onthecuttingedge2005

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Re: Magnetic shield by use of a second magnet - A better way I think.
« Reply #15 on: July 04, 2009, 02:01:38 AM »
I was thinking more along the lines of a stator magnet using the shielded shorter Halbach array version.

Jerry

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Offline Low-Q

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Re: Magnetic shield by use of a second magnet - A better way I think.
« Reply #16 on: July 06, 2009, 10:39:05 PM »
I see. It seems that the magnetic field we want to use will weaken if we shield it. A shield cannot destroy magnetism, so the magnetic flux is instead very densed with steep turns in order to close the magnetic loop, so less magnetism is "spread out" so we can use it...I'm not sure if I understood what I wrote right there ;D

I will, when I get time, make a drawing on how to set up the magnets, more like @broli suggested - let the magnets as little as possible affect the slide process. I think I have a good idea how to make it.

But thanks anyway for your drawing :). I think I understood the intention, but I still think you will have two poles, or else the magnetic field would have to collapse into no field at all.

I'll try to stick to my doubble-zip (|||||><|||||) lookalike magnetmotor...for now....

Vidar

Offline lumen

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Re: Magnetic shield by use of a second magnet - A better way I think.
« Reply #17 on: July 10, 2009, 05:10:27 AM »
@Vidar, If you get some extra time, try FEMM to see if the results indicate the same as indicated in the pic.

You could also flip magnets A over to test the same setup using your concept. It seems the setup works better when the hidden magnets are short and don't cross the center of the large magnet.


Free Energy | searching for free energy and discussing free energy

Re: Magnetic shield by use of a second magnet - A better way I think.
« Reply #17 on: July 10, 2009, 05:10:27 AM »
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Offline Low-Q

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Re: Magnetic shield by use of a second magnet - A better way I think.
« Reply #18 on: July 12, 2009, 10:42:51 AM »
I can do a simulation, but first i have some comments:

In the second picture, magnets A is moving left. These magnets will face a number of counterforces. The leftmost magnet A does not want to move away from magnet B, and it does not want to move away from magnet C - because N pole of the leftmost A is attracting the S pole of C as well. The rightmost magnet A does want to go to the center of magnet B, but it does not want to approach the equal N pole of C.

Magnet C is the joker here. It will in any case be the break and balance the system.

It is easier to take away magnet B, and then figure out how the magnets will behave. Magnet B does not change anything in how magnets A and C are affecting on eachother. Magnet B is just providing the extra forces that is affecting A and C, and just confuse us to think too complex, so we forget the obtacles.

It's easier to determine the forces if you take one element at the time.

Vidar


Free Energy | searching for free energy and discussing free energy

Re: Magnetic shield by use of a second magnet - A better way I think.
« Reply #19 on: July 12, 2009, 08:31:35 PM »
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Offline lumen

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Re: Magnetic shield by use of a second magnet - A better way I think.
« Reply #20 on: July 13, 2009, 03:24:58 AM »
@Vidar, If all forces are the same without magnet B, then any method to shield a magnet with another magnet would not work. It would only be the same configuration operating within a larger constant field.
I do not disagree with that line of thinking as that could be the case.

I need to learn to use FEMM myself and this could be a place to start.



Offline Low-Q

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Re: Magnetic shield by use of a second magnet - A better way I think.
« Reply #21 on: July 13, 2009, 10:32:18 PM »
@Vidar, If all forces are the same without magnet B, then any method to shield a magnet with another magnet would not work. It would only be the same configuration operating within a larger constant field.
I do not disagree with that line of thinking as that could be the case.

I need to learn to use FEMM myself and this could be a place to start.
Unfortunatly its true. Magnetic forces can be disturbed by other forces, but in the big picture, no shield or "hidden" magnets can take away the fact that magnetism will affect magnetism no matter how complex the system is. My experiment with my idea failed, because the step from being magnets to "destroyed" flux, and back into magnetism, if the intention is to benifit a forward motion, the cost of that very movement from magnetic flux to nothing, and back, cancelled out perfectly by the presence of the moving magnet. And later I said "Ofcourse. I am just thinking too complex, and still are blowing on my own sails".

Download FEMM and find the user guide, and give it an eyeball. Read it carefully and follow the examples. Try to experiment with the "stock" examples to understand how these works. How you add materials in the user library. How you point up dots where lines are suppose to be attached to - so you finally have made your first shape. It took me only a few minutes to understand the very basics of this software - I'm soon 40...that said - I still use the very basics of it, and only in the magnetic section. No need for advanced skills when using FEMM.

You can download all of it here:
http://femm.foster-miller.net/wiki/HomePage

Vidar

Free Energy | searching for free energy and discussing free energy

Re: Magnetic shield by use of a second magnet - A better way I think.
« Reply #21 on: July 13, 2009, 10:32:18 PM »
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Offline superhero

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Re: Magnetic shield by use of a second magnet - A better way I think.
« Reply #22 on: July 05, 2014, 02:45:08 AM »
I was thinking more along the lines of a stator magnet using the shielded shorter Halbach array version.

Jerry
Omg please check this video.  The best magnetic shielding is spin.  This video shows 55lbs magnet losing its attraction for e to a steel disk due to spin. Enjoy
Also Watch "The best magnetic shielding is spin" on YouTube
The best magnetic shielding is spin:http://youtu.be/8C6uyQ0bct4

 

OneLink