Eddy (or Foucault) currents: The principle is that an electric charge is induced into a conductor by changes in magnetic flux cutting through it. Such changes in magnetic flux can be achieved by rotating permanent magnets past an electrical conductor. The effect of such currents is to induce a secondary magnetic field around the non-ferrous particle. This field reacts with the magnetic field of the rotor, resulting in a combined driving and repelling force which literally ejects the conducted particle from the stream of mixed materials. This repulsion force in combination with the product belt speed and the optimization of the product splitter plate provides the means for an effective separation.