A magnetic brake consists of a permanent magnet, which induces currents in a rotating copper disk. The resulting eddy currents interact with the magnetic flux to produce Lorentz forces and subsequently a braking torque.
This 3D problem is solved using a stationary formulation for the electromagnetic field coupled to an ordinary differential equation for the rotational rigid body dynamics.
The model also illustrates the proper use of a Lorentz type induced current density term. Furthermore, an ungauged A-V formulation is used to solve the electromagnetic part in a fast and memory-efficient way.

A magnetic brake consists of a permanent magnet, which induces currents in a rotating copper disk. The resulting eddy currents interact with the magnetic flux to produce Lorentz forces and subsequently a braking torque.
This 3D problem is solved using a stationary formulation for the electromagnetic field coupled to an ordinary differential equation for the rotational rigid body dynamics.
The model also illustrates the proper use of a Lorentz type induced current density term. Furthermore, an ungauged A-V formulation is used to solve the electromagnetic part in a fast and memory-efficient way.