Introduction of Induction Heating Process and Power Control with PDM tecnique.

My thesis deals with the phenomenon of induction heating in an industrial context. This type of phenomenon is complex to study because it depends on many factors such as the type of heating to be carried out (core heating or surface heating), the geometry and properties of the load to be heated (many construction parameters of the body vary as the temperature increases). We will see how, starting from the definition of a magnetic field, physical parameters can be linked to electrical parameters. Thanks to this link, we can control the heating we wish to apply to the load. After having studied in depth how the phenomenon occurs analytically, my paper proposes the study of the power electronics of the induction furnace, how the power is controlled and what are the ideal conditions to be able to achieve efficient heating with minimum losses. In particular, we focus on the pulse density modulation (PDM) technique, which is the ideal technique for high-frequency applications due to its ease of control and ability to minimise switching losses in semiconductors.

Introduzione al processo di riscaldamento a induzione e controllo di potenza con tecnica PDM.