Optimization of a 1 kW resonant converter operating at 2.5 MHz driving an inductively coupled plasma lamp

Konferenz: PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
07.05.2019 - 09.05.2019 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2019

Seiten: 6Sprache: EnglischTyp: PDF

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Eizaguirre, Santiago; Denk, Fabian; Simon, Christoph; Heidinger, Michael; Kling, Rainer; Heering, Wolfgang (Karlsruhe Institute of Technology (KIT), Light Technology Institute (LTI), Germany)

When designing a resonant power converter operating in the MHz range, several design parameters, as for example the exact operating frequency, the DC voltage, the snubber capacitance and the complete design of the resonant tank and matching network must be defined. In this work, we investigate the impact of those parameters on the power losses of a MHz inverter. Through circuit and FEM simulations we obtain a model of the losses of each component. Then measurements on a working system are contrasted with these, as for facing the problem of determining the parameter selection that gives the highest achievable efficiency. The results highlight the limiting factors of further efficiency improvement and provide a modeling approach of the whole optimization problem, which could be easily applicable to similar converters.