Converting mechanical energy into thermal energy
Permanent magnets - Applications and prospects

The conversion of mechanical energy into thermal energy using induced currents has become widespread with the introduction of induction ovens and hobs. However, many other applications, often less well known to the general public, use these same currents, which sometimes generate unwanted heating.

Consider the diagram in figure 24 , where the driven part no longer consists of a magnet as in figure 22 a, but of a non-magnetic circular disk D, a good electrical...