opster
Mechanical
- Oct 3, 2006
- 20
I need a rough idea of the field strength and gradient as a function of axial distance for a disk shaped perm magnet. I found a formula on the internet ( that I don't think is right. Shouldn't the formula be corrected for the demagnetizing field ( Br*(1-Nd), where Br is the remanence and Nd the demagnetizing factor )?
I need to produce a 1Newton force at a distance of 4cm on an iron or permanent magnet object with a volume of 1.57*10^-8 meters^3. I would like the field source to be as small in size as possible. The field source should be less than a pound in weight. I don't think it's going to be possible. The formula I'm using for the force is F = J*Volume*(dH/dx), where J is the polarization of the particle, and dH/dx is the field gradient.
Thanks for any suggestions
I need to produce a 1Newton force at a distance of 4cm on an iron or permanent magnet object with a volume of 1.57*10^-8 meters^3. I would like the field source to be as small in size as possible. The field source should be less than a pound in weight. I don't think it's going to be possible. The formula I'm using for the force is F = J*Volume*(dH/dx), where J is the polarization of the particle, and dH/dx is the field gradient.
Thanks for any suggestions
