Series Resonant Converter Applied to Contactless Energy Transmission

This paper presents the theoretical analysis, simulation and design optimisation of a Series Resonant Converter (SRC) working as an interface for inductive coupling. Inductive coupling is needed when the transfer of energy has to be made without any electrical contact. In this case the coupling transformer has to be separable, i.e., the transformer parameters are time varying variables, instead of constants. It is shown that, the operating region that leads to the highest efficiency can be identified. By appropriate control the SRC is insensitive to the transformer parameters’ variations and therefore, it is one of the most suitable topologies to be used in contactless energy transmission.