Single Three-Phase Inverter for Dual-Frequency Induction Heating

Krystian Frania (), Kamil Kierepka, Marcin Kasprzak and Piotr Zimoch
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Krystian Frania: Department of Power Electronics, Electrical Drivers and Robotics, Silesian University of Technology, 44-100 Gliwice, Poland
Kamil Kierepka: TRUMPF Huettinger, 05-220 Zielonka, Poland
Marcin Kasprzak: Department of Power Electronics, Electrical Drivers and Robotics, Silesian University of Technology, 44-100 Gliwice, Poland
Piotr Zimoch: TechFirm Industrie AG, 8001 Zürich, Switzerland

Energies, 2024, vol. 17, issue 11, 1-17

Abstract: This paper presents new resonant inverter topologies for dual-frequency induction heating (IH). These 2T1C and 3T topologies combine the advantageous features of two- and one-inverter solutions. An analytical description of the load impedance of a dual-frequency series-parallel circuit has been made. Using manufacturer datasheets and LTspice models of selected transistors, a MATLAB model was parameterized. Based on it, power losses are determined as a function of the following parameters: nominal power, frequency and DC bus voltage. The obtained results allowed for determining the data necessary in the design process. The research has been experimentally verified. Tests were carried out for pulsing and simultaneous operation. Power control characteristics as a function of frequency are determined. The possibility of operating the inverter with high efficiency (>97%) in the proposed 2T1C and 3T systems at nominal power is demonstrated.

Keywords: gear hardening; frequency modulation (FM); SiC power MOSFETs; resonant power conversion (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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