This example is taken from Cornell University’s ANSYS AIM Learning Modules

Learning Goals

In this tutorial, you will learn to:

• Determine magnetic field and electromagnetic force using Electromagnetics capabilities in Discovery AIM
• Perform parametric study

Problem Specification

The yoke and center pole shown directly below are made of Steel 1010. The stranded copper coil is excited by a DC current. The coil ampere-turns are 1000, 3000, 4500 and 5000 which is sufficient to saturate the steel.

Pre-Analysis 

Governing Equation: Magnetostatics is the study of magnetic fields in devices where the magnetic field is generated from DC (steady) currents and/or permanent magnets.  Magnetostatics is a special case of Maxwell’s equations, which form the basis of electromagnetism.

For magnetostatics the electric field inside of a current carrying coil is completely decoupled from the magnetic field, and the following Maxwell’s equations are solved for magnetostatics –

Where ∇ denotes divergence, H is the magnetic field intensity, J is the current density and B is the magnetic flux density.

Geometry

Download the file here

The following video shows how to import the geometry in Discovery AIM

Physics Setup

The following video shows how to assign materials and boundary conditions.

Results Evaluation

The following video shows how to compute magnetic field and electromagnetic force. It also shows how to perform parametric study and compute forces for different values of current.