Recent content by rayjbryant

I also found this paper, I might try implementing the model of eddy current forces formulated there. https://aapt.scitation.org/doi/abs/10.1119/1.4933295

Hello vanhees, I've looked at this paper before. Something I tried to do was treat each wrap of the coil as an individual segment and integrate to get its contribution. I wasn't sure if my results were reasonable. I get a very small terminal velocity. clc clear all close all % magnet...

So I'm familiar with the magnet falling through a copper tube demonstration that shows the induced magnetic fields slowing the magnet down. I know that this experiment is also possible with a conducting coil as long as the coil forms a closed circuit. I'm trying to find a way to calculate the...

Okay, I get it now, thank you very much.

I read the article over, I believe the wedge example somehow pertains to my issue, but I'm not sure I get it yet.

Thanks for the reply, The force acts perpendicular to the slender rod because tangents and radii are always perpendicular. The rod wants to move in a circular arc around point N, and therefore is resisted by a tangent force at point O. The force at the wall is vertical if the coordinate axis is...

So basically, I got close to a zero for my solution to this problem. I'm guessing based on the posted solutions that I wasn't able to get partial credit due to the fact that my coordinate axis was aligned with the slender bar and not in its usual perpendicular position. This resulted in...

an example I believe the performance will be improved because rather than wasting magnetic flux on the outer facing poles, it is redirected towards the middle where it will push back harder against the solenoid field, which according to Newtons third law will cause a greater force.

The cylindrical halbach arrays I'm finding have their poles oriented so that they point upward and not into the page. This poses a problem because a sideways cylinder will not fit in the coil. I need cylindrical halbach arrays that behave similar to a cylindrical magnet, with their pole facing...

For this to work properly the arrangement is (NSbatterySN) since one of the poles must be exposed to more flux to create a net force. at 3:50 it is explained

The strong side would be where the greatest magnetic flux density from the coil is which would create a net force. The fact that the halbach array can be more compact and deliver twice the magnetic field strength would make this a more efficient machine.

So I guess what I am asking is if I could make the desired halbach array simply by wrapping a planar array.

worlds simplest electric train I'd like to try this experiment but with a halbach array to see if I can increase the speed without increasing weight. The doubled strength of a halbach array, along with the fact that the magnetic field is already unbalanced means I can have a lighter more...