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Thread: Electrodynamic tethers

  1. #1 Electrodynamic tethers 
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    Hello,

    I am trying to experiment electrodynamic tethers.
    When a direct current is pumped through the tether, it exerts a force against the magnetic field. I have built a small, closed circuit using a 12 volt battery and bare copper rod. I have set two magnets with the opposite poles facing each other and have a minute particle hanging. when I move the copper rod along the magnetic field, I hope to see a force acting on the particle. I am unable to make this concept work. Can someone please help me with the following questions-

    Is my design correct?
    How should the current be passed on the tether?

    Can someone please help me to make this design work?

    Thanks.


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  3. #2  
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    Please post in only one sub-forum. I deleted the other one.

    What is the particle hanging from? How is the current flowing if you just have a rod? I cannot picture what you are trying to do.


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  4. #3  
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    Sorry, I forgot to delete the other one. Thanks for deleting the one in general section.

    Right now I have the rod connected to a closed circuit. I have a picture of the basic design that I have built. Can you please take a look at it and tell me where I am going wrong.
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    Last edited by neta; February 24th, 2012 at 03:53 PM.
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  5. #4  
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    Sorry, but I can't tell anything from that picture. What are the wires connected to? What is a "tether"? What is the particle and what is it hanging from? Where did you get this idea? Why do you expect to see a force?
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  6. #5  
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    Here I mean a 'conducting wire' as a tether. I connected a 12 volt battery to two sides of a copper rod, forming a closed circuit. I am hanging a small paint flake in between the magnetic field though a thread. I am trying to simulate electrodynamic thrust generator. It is my hope that when the electrically charged rod moves through the magnetic field, a force is exerted that pushes the paint flake hanging in the magnetic field. Please tell me if I am heading in the right direction with the design.
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  7. #6  
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    Is your paint flake ferromagnetic?

    Try running your DC current through an insulated wire, wrap the wire around your copper rod in loops as many times as possible.
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  8. #7  
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    Thanks Wintermute. That was my original design. It works now.
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