Curie Effect and Magneto-Caloric Material
The Curie point defines the temperature, where a reversible phase change of magnetic properties of magneto-caloric materials occurs. The magneto-caloric material behaves paramagnetic above its Curie point (i.e. behavior in a magnetic field comparable to plastics) and ferromagnetic below its Curie point (i.e. behavior in a magnetic field comparable to iron). This behavior is named Curie Effect.
Energy Conversion and Fast Thermal Switch
At a temperature below the Curie point the magneto-caloric material is attracted by the magnetic field of a permanent magnet (ferromagnetic properties). With a temperature above the Curie point, the magneto-caloric material passes the magnetic field of a permanent magnet unhindered (paramagnetic properties). By a fast change in temperature above and below the Curie point of the magneto-caloric material (Fast Thermal Switch) combined with an accurate placement of permanent magnets, a continuous rotation of the rotor is achieved. This mechanical energy is afterwards converted in electricity.