Do neodymium magnets loose energy?

[mailhiot]

Generally, most of the research I have done says that neodymium magnets do not loose their energy, even when dropped or around other magnets, and will last 400 years. But what about if the neodymium magnets are constantly in motion and interacting with each other?

Our system has a Sphere neodymium magnet moving along a "magnet track" with Cylinder neodymium magnets, similar to this Youtube video:


We need to know HOW MANY PASSES a sphere magnet can make before the cylinder magnets along the magnet track loose 10% of their energy. Our system has a sphere magnet passing at a speed of about 1.0 m/s, 3 times per second, so lots of magnetic activity. That means 94,608,000 passes a year!

Can the energy loss of energy for the Cylinder neodymium magnets along the magnet track be calculated ?

Sphere magnet:
1 1/2" diameter Grade N42 - Nickel Plated
http://www.kjmagnetics.com/proddetail.asp?prod=SX8

Track magnets:
1/2" dia. x 1/2" thick Grade N42 - Nickel Plated
http://www.kjmagnetics.com/proddetail.asp?prod=D88

The sphere magnet is moving at about 1 m/s.

The cylinder magnets along the magnet track are about 0.25 inches from the surface, so the sphere magnets are always 0.25 inches away from the cylinder magnets.

I do need a complete calculation that I can show to someone with a Ph.d. in physics who would agree with the calculation.

Can anyone help?

 

[Vailanor]

Unfortunately, calculating the exact energy loss of the cylinder magnets in this system is not possible without more information. There are too many variables to consider that would influence the rate of energy loss, such as the type and strength of the material the track is made of, the size and shape of the sphere magnet, the speed and frequency at which it is passing, the distance between the sphere and cylinder magnets, etc. However, you can make an educated estimation based on the information you have provided and your understanding of the physical principles at work. For a rough estimate, you can assume that the energy loss of the cylinder magnets will be proportional to the amount of time they spend interacting with the sphere magnet. If the sphere magnet is passing 3 times per second, then each cylinder magnet will be interacting with it for approximately 0.33 seconds. Therefore, if the sphere magnet makes 94,608,000 passes in a year, the total amount of time each cylinder magnet will spend interacting with the sphere magnet in a year is roughly 31,536,000 seconds. If the cylinder magnets lose 10% of their energy over the course of this time, then this would equate to about 3,153,600 passes of the sphere magnet for each cylinder magnet.