Magnetic strength over distance

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    Magnetic Strength
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SUMMARY

This discussion focuses on calculating the magnetic force exerted by an electromagnet on a small motor from a distance of one foot. The electromagnet in question is sourced from MPI Magnetics. Participants confirm that numerical methods, and sometimes analytical methods, can be used to determine the magnetic field distribution. For precise calculations of local forces and torques, the use of finite element software is recommended, as it often includes features for force calculation.

PREREQUISITES
  • Understanding of electromagnetism principles
  • Familiarity with magnetic field distribution
  • Knowledge of finite element analysis (FEA) software
  • Basic engineering principles related to force and torque
NEXT STEPS
  • Research the specific electromagnet model from MPI Magnetics for detailed specifications
  • Learn how to use finite element software for magnetic field analysis
  • Study the principles of magnetic force calculation in engineering contexts
  • Explore numerical methods for solving magnetic field distribution problems
USEFUL FOR

Engineers, robotics enthusiasts, and anyone involved in projects requiring the application of electromagnetism and finite element analysis for calculating magnetic forces.

magneto123
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I am working on an engineering project in which I am mounting an electromagnet onto a small RC robot. The link for the electromagnet is here http://www.mpimagnet.com/catalog.asp?prodid=670540&showprevnext=1
I was wondering if there was any way to calculate the force exerted by the magnet on a small motor from a distance of about a foot. Any ideas?
 
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magneto123 said:
I am working on an engineering project in which I am mounting an electromagnet onto a small RC robot. The link for the electromagnet is here http://www.mpimagnet.com/catalog.asp?prodid=670540&showprevnext=1
I was wondering if there was any way to calculate the force exerted by the magnet on a small motor from a distance of about a foot. Any ideas?

Yes, it's possible numerically ( in some cases analytically too). You need to know the distribution of magnetic field first. Calculating the total force applied on a body surrounded by air, in a magnetic field , is surprisingly simple even when the object has a complicated shape.
see http://www.fieldp.com/documents/stresstensor.pdf

Calculating local forces and torques are a little more challenging. You need to use a finite element software for such calculations. Calculation of the force is often one of the features of a finite element software.
 

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