Electromagnetic Induction -- Insane Idea

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Discussion Overview

The discussion revolves around the concept of transferring current through rings of conductive and paramagnetic materials using electromagnetic induction. Participants explore the theoretical implications of inducing current through magnetic fields, particularly in the context of a research project for the First Lego League (FLL).

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant inquires whether a current can be transferred through rings of conductive and paramagnetic material, suggesting a mechanism involving magnetic fields and induced currents.
  • Another participant questions the use of quotes around "current," seeking clarification on whether the discussion pertains to transformers or inductive coupling.
  • Some participants express curiosity about the acronym FLL, with explanations provided about its meaning related to an international robotics competition.
  • A participant mentions the limitations of coupled lines in electromagnetic applications, noting that they can be imperfect and lossy.
  • There is a suggestion that passing an AC current through a wire loop connected to an iron chain link could induce a current in subsequent links, though concerns about high losses are raised.
  • Another participant proposes that the concept might relate to metamaterials, emphasizing the challenges of efficiency and the emerging nature of this research area.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and interest in the original question, with some seeking clarification while others provide insights into related concepts. There is no consensus on the feasibility or implications of the proposed idea, and multiple viewpoints remain present.

Contextual Notes

Participants note that the original question lacks sufficient detail, which may hinder the discussion. There are also references to unresolved issues regarding the efficiency of the proposed methods and the characteristics of the materials involved.

Who May Find This Useful

This discussion may be of interest to those involved in electromagnetic research, robotics competitions, or students exploring concepts of inductive coupling and electromagnetic induction.

TateTheL
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TL;DR
TL;DNR Can you use electromagnetic induction to transfer a current?
Engineering news on Phys.org
Your link requires permission. Why do you put current in quotes? Are you asking about transformers?
 
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Welcome to the PF.
TateTheL said:
this is a research project for FLL
What's FLL?
 
berkeman said:
Welcome to the PF.

What's FLL?
Yeah, I don't think he's talking about the Broward County Airport (Florida) :smile:
 
I'm curious to know what FLL is too, and I'd like to know what's insane about this.

I once had lots of fun ideas about coupled lines. There's always a caveat: They are often imperfect and lossy, and this creates huge limitations.
 
Well, TL:DNR means Too Late: Do Not Resuscitate
 
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@TateTheL you obviously are not going get any answers unless you clarify your question.
 
phinds said:
Your link requires permission. Why do you put current in quotes? Are you asking about transformers?

Current is in quotes because it wouldn't be just a current, it would theoretically be switching from magnetic field to current and back, so its like a current, but not actually a continuous current.
 
berkeman said:
Welcome to the PF.

What's FLL?

FLL is First Lego League, an international robotics competition that also has a research project. This year, the topic is "problems in cities", so we researched them and tried to make a solution
 
  • #10
TateTheL said:
Current is in quotes because it wouldn't be just a current, it would theoretically be switching from magnetic field to current and back.
Yes, that's how it works to cause current in one object to induce current in anther object, there's a moving magnetic field between the two, so your caveat is unnecessary (but I now understand why you thought it was needed).
 
  • #11
TateTheL said:
FLL is First Lego League, an international robotics competition that also has a research project. This year, the topic is "problems in cities", so we researched them and tried to make a solution
And what does your still not very well described device have to do with solutions for cities? I don't mean that I doubt that there IS one, just that you have not given us any information. What is it that you are trying to do?

Just so you know, when it starts to feel like pulling teeth to get information from someone asking a question, people lose interest pretty quickly.
 
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  • #12
Are you talking about inductive coupling for wireless charging or power transfer?

Cheers
 
  • #13
It is very interesting because it is an unusual transmission line. But we need a bit more, as people have asked.
 
  • #15
Maybe if you pass an AC current through a wire loop that passes through an iron chain link, a magnetic field will be induced in the first chain link. That first link will then induce a current in the next link, and so on up the chain. A light globe hanging from odd links will light, but from even links will not.

Surrounding two linked links with a separate link will generate a current and a flux in every link of the chain. Then a light would light when hanging from any link.

But the losses will be very high unless you can make links with the optimum magnetic characteristics. I do not know how to make those dual function transforming links.
 
  • #16
Kind of metamaterial, then.
Sure, you can. The efficiency, however, is a very different question: together with the wavelength/frequency and such.

Fresh, emerging area of research: nice to post but not likely to get useful answers :sorry:
 

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