Motor ? for patrick

[jokerjustin]

Originally Posted by Pdelcast

Not Neo magnets, as far as I know. We've never seen a magnet that was weakened at all -- unless it was overheated. Heat is really the only enemy of Neodymium magnets. The magnets we use are rated to 200C operational, so it's pretty tough to get them too hot. :)

just wanna make sure thats not a typo... there rated for 200 Celsius!?!? thats 392 Fahrenheit!

[J57ltr]

I would really like to know some of the ins and outs of magnet zapping. When I worked at the oil field tool place the guy that designed the jig quit months before I got there and most of the guys in my unit had no interest as long as it worked. I remember that the coil was not very large maybe 70-100 turns of 12 Ga. magnet wire. Once you started the process you would see the slug jump a little about 3 times.

I saw How it's Made and they were charging some horseshoe magnets across 2- (aprox) 12" square plates that looked 1/2" thick They passed a current through the plates IIRC ~200A and ~7-10V.

I have played with some electromagnets before but I haven't really read anything indepth on this subject and there is not a lot on the net about it. I know it's not the not the original question but it would be great to get a long exciting technical explanation.

One question I have on the brushed zappers is since you still have the magnets in the can doesn't that effect the flux across the magnets or is the field so strong that it doesn't matter.

Jeff

[Pdelcast]

Originally Posted by jokerjustin

just wanna make sure thats not a typo... there rated for 200 Celsius!?!? thats 392 Fahrenheit!

Yep, that's right. 200C -- but remember, it gets hotter in the can than outside the can...