The aim of the diploma was to make a device for contactless induction heating
and melting of aluminium. The first part of the diploma presents the importance of
induction heating, its advantages over conventional heating methods, areas of
application and basic electromagnetic phenomena that are crucial to understand the
operating principles of induction heating of conductive materials.
The second part of the diploma presents the key components of an induction
heater and their operation. This chapter describes the advantages and disadvantages
of serial and parallel LC oscillating circuit and provides the calculation of component
values for the parallel LC oscillating circuit. The starting point for component
calculations and dimensioning of the coil was determined by the graphite vessel
(crucible) in which the aluminium is melted. The operation of the parallel push-pull
resonant LC oscillating circuit that excites the resonant LC oscillating circuit is also
presented. Full bridge rectifier with thyristor-controlled DC voltage and LC filter is
in charge of powering this kind of circuit.
The third part of the diploma presents the results and the testing process of the
final product.
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