Finding forces/torques on a permanent magnet from a coil

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SUMMARY

This discussion focuses on calculating the forces exerted by a current-carrying coil on a permanent magnet, specifically in the context of electrical motors. Key factors include the geometry of the coil and magnet, with neodymium magnets being a common example. The conversation highlights the importance of computational electromagnetics as a foundational tool for these calculations. Participants suggest starting with online resources to locate relevant academic papers and methodologies.

PREREQUISITES
  • Understanding of coil geometry and its impact on magnetic fields
  • Familiarity with neodymium magnets and their properties
  • Knowledge of CAD modeling for magnet design
  • Basic principles of computational electromagnetics
NEXT STEPS
  • Research "computational electromagnetics" techniques for force calculations
  • Explore methods for modeling coil and magnet geometries in CAD software
  • Investigate academic papers on the interaction between current-carrying coils and permanent magnets
  • Learn about simulation tools for electromagnetic field analysis, such as ANSYS Maxwell
USEFUL FOR

Electrical engineers, mechanical engineers, and researchers involved in motor design and electromagnetic applications will benefit from this discussion.

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I want to know what methods there are for calculating forces by a current-carrying coil on a permanent magnet (the application I have in mind is electrical motors). I.e. given a geometry (like a CAD model of the magnet), the magnet type (e.g neodymium), and wire coil geometry, how are the forces calculated?

I tried looking for some papers but had no luck. I'll appreciate any pointers. Thanks!
 
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