Eddy-Current Losses

Cause and Avoidance

When the coupling's magnetic field rotates relative to a conductive containment-shell wall, eddy currents are induced in that wall and lost as heat. The losses increase with speed, field strength and the conductivity or wall thickness of the material. They can be reduced by non-conductive materials (ceramic, PEEK, plastic) or thinner walls — with metallic shells, adequate heat dissipation must be planned.