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Magnet Formulas¶

A small web site devoted to the vanishing art of practical magnet design without FEA (Finite Element Analysis).

Experimental! Read Magnet Formulas as live IPython notebooks using binder.

The Basics¶

  • Maxwell and His Equations
  • The Law of Biot Savart

Simple Magnetic Field Formulas¶

  • Field due to electric current in an infinitely long, straight wire
  • Field inside an infinitely long, straight, air-core solenoid
  • Field inside an air-core toroid
  • On-axis field due to a current loop
  • On-axis field due to a thin shell solenoid
  • On-axis field due to a solenoid

Off-Axis Magnetic Field Formulas¶

  • Off-axis field due to a current loop
  • Off-axis field due to a magnetic dipole moment
  • Off-axis, axial field component due to a solenoid

Helmholtz Coil Formulas¶

  • Axial field of an ideal Helmholtz coil
  • Axial field of a non-ideal Helmholtz coil

Magnet Formulas, © 2018 by Eric Dennison. Source code and license on Github

This website does not host notebooks, it only renders notebooks available on other websites.

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