tutorial

1 FEMM 4.2 Magnetostatic Tutorial David Meeker dmeeker@ieee.org January 25, 2006 1. Introduction Finite Element Method Magnetics (FEMM) is a finite element package for solving 2D planar and axisymmetric problems in low frequency magnetics and electrostatics. The program runs under runs under Windows 95, 98, ME, NT, 2000 and XP. The program can be obtained via the FEMM home page at http://femm.foster-miller.com. The package is composed of an interactive shell encompassing graphical pre- and post-processing; a mesh generator; and various solvers. A powerful scripting language, Lua 4.0, is integrated with the program. Lua allows users to create batch runs, describe geometries parametrically, perform optimizations, etc. Lua is also integrated into every edit box in the program so that formulas can be entered in lieu of numerical values, if desired. (Detailed information on Lua is available from http://www.lua.org.) There is no hard limit on problem size—maximum problem size is limited by the amount of available memory. Users commonly perform simulations with as many as a million elements. The purpose of this document is to present a step-by-step tutorial to help new users get "up and running" with FEMM. In this document, the solution for the field of an air-cored coil is considered. 2. Model Construction and Analysis This will take you through a step-by-step process to analyze the magnetic field of an air-cored solenoid sitting in open ...