I am working on a project which is in relation to electromagnets, however I have a very mediocre understanding of electromagnetism. Below is a poorly constructed sketch of my design: Please Register or Log in to view the hidden image! I would like to know if anyone could explain, or diagram how the magnetic field of this design would function. As a side note: Is there a way to control the field, as to make it dynamic throughout the different parts of the core? This of course would take more than is shown in the sketch.
Specially.... https://en.m.wikipedia.org/wiki/Right-hand_rule And you can look up http://www.google.co.in/url?q=https...ggTMAE&usg=AFQjCNHlPfRC__BjRFeiV1Aze_ew1DmF3g http://www.google.co.in/url?q=https...ggXMAI&usg=AFQjCNFM3xWPWLkQo6Mw8dJofiw1UQaymg
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I think you should ask to have this moved to Physics. Although it looks like Engineering, I think it needs physics input. It looks like a transformer core. This, so far as I understand, has no stray flux outside the core, so all the flux will stay inside the core. As least, it would if you close the ends. Is that what you intend? I am not sure what you mean by making it dynamic - can you elaborate with an example? P.S. Here is the physics of this device, I think: http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/indtor.html And here is a description of an inductor coil, using this principle, with some pictures: https://en.wikipedia.org/wiki/Inductor
It's a very straightforward solenoidal field bent in a circle. It is a common configuration for wound toroidal inductors. Sure. Increase and decrease the current. That will make the field dynamic.
After searching the site for a while I came across this: Please Register or Log in to view the hidden image! I believe that this is the kind of thing that I am looking to create. When I said "dynamic" I meant that I could control the magnetic power of different parts of the electromagnet. Please Register or Log in to view the hidden image! Perhaps (if you can make sense of my poorly drawn diagram) a system in which each of the different inputs are hooked up to their respective plugs on a central chip. Allowing the power going to each of these sections to be different. Would this work to create a sort of 'warped' magnetic field?
OK. You have drawn two different things here. The first is a wire loop forming a basic solenoid with a single turn, creating an external field in space, as shown by the blue field lines. The second is like your original, i.e. a toroidal coil, in which the magnetic field forms a closed loop within the core. Perhaps what you mean is that the second case can be regarded as composed of lots of loops like the first, all working on creating a field inside the common toroidal core. Is that right? And do we take it that the black circle in your second diagram is indeed a magnetically conductive core? If so then the first observation is that this now looks like a series of transformer windings. Any change in the current flowing through one circuit will induce a current in the others. So they will affect one another. I do not think you can get different flux in different parts of the core. The flux in the core will be a sum of the effects from all the coils. But I'm open to correction as I'm not an electrical expert.
No. You have just drawn a transformer; a common electrical component that couples several windings to the same magnetic field.
Yes, I think if the current is AC then the induce affect one another is so important but if it is DC so the affect is not important... Is it ?
Yes, but that is why I said any change in current.Please Register or Log in to view the hidden image! AC is continually changing, whereas DC doesn't, apart from when you switch it on or off.
Yes, it's still important. (And you did say "As a side note: Is there a way to control the field, as to make it dynamic throughout the different parts of the core?" - which means you are talking about AC.)
Sorry for the lack of activity, I've been busy. I see where the problem is, and I had a thought on what I could do about it: Instead of working with a ring, I could potentially work with multiple rods placed into a ring shape; like so: Please Register or Log in to view the hidden image! This would allow me to control the magnetic power of each of the individual rods, correct?
Not unless the air gaps between them were very significant. If they were, then although the fields created by each segment would influence the others, it would not solely determine what the field would be. In transformer terms, your K would go down.
Thank you to everyone who has replied. I believe that I have enough information to continue with my project. Again thank you for your help.
