User:Brian P. Josey/Notebook/2010/04/02

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Comparison of Complex Neodymium to Iron Yoke

I analyzed the model from Wednesday, and unsurprisingly, it works just the way the I expected. Here is the magnetic field intensity, left, and derivative, right:

Complexneo field 4-2.pngComplexneo derv 4-2.png

Here are the differences between the iron yoke and the neodymium magnet. In both problems, it is set up so that a positive value indicates a higher value for the neodymium yoke.

Steve Koch 08:34, 3 April 2010 (EDT): Cool! Definitely want to look at this with you soon. How many times stronger is the field gradient for the neodymium? At first I thought 300x, but that can't be right. Not sure how to interpret your graph.
Brian P. Josey 12:33, 5 April 2010 (EDT) The graph shows the difference, so a value of 300 means that the gradient of the neodymium at that point is the gradient of the iron yoke plus 300. So it is the additional strength of the neodymium and not the magnitude difference. I'll see what I can do about a program that will measure how many times more powerful the field is.

Complexneo fielddif 4-2.pngComplexneo dervdif 4-2.png

The red lines in both represent a zero difference for reference.

Magnets

The ninety degree bends came in today. They are very powerful, with a rating of 45 MGOe, with an outer radius of 2" and inner radius of 1" that translates to a lot of magnetic force coming off of them. I set them down in a box to store them, and they ripped through a large piece of Styrofoam without mercy. I'm still trying to come up with a good way to hold them all together without risking them snapping together, or clumping together.