A series-resonant inverter with extended topology and pulse-density-modulation control for induction heating applications

Pavlo Herasymenko, Volodymyr Pavlovskyi, Oleg Yurchenko

Abstract


This paper presents a series-resonant inverter (SRI) with an extended topology using a pulse-density modulation (PDM) control method. Theoretical analysis shows that the use of the SRI with extended topology and the PDM control (extended PDM-SRI) allows reducing the fluctuation of the SRI output current by more than 40% at the quality factor of 5 compared to a conventional SRI with the traditional PDM control. To eliminate drawbacks of the extended PDM-SRI, specificities of PDM switching sequences to ensure the ZVS operation are discussed in detail, and a solution to the voltage imbalance across the capacitors of the extended topology is proposed. Simulation analysis of the extended PDM-SRI confirmed the effectiveness of using the proposed solutions to eliminate the drawbacks. The feasibility of the proposed SRI is confirmed by testing on a 2.2 kW experimental setup.

Keywords


control method; current fluctuation; induction heating; pulse-density modulation; series-resonant inverter



DOI: http://doi.org/10.11591/ijpeds.v13.i1.pp%25p

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