Development of Series Resonant Inverters for Induction Heating Applications



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Submitted Nov 11, 2018
Published Dec 12, 2018
10.24018/ejeng.2018.3.12.975

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This paper proposes a cost-effective series resonant inverter employed in applications of induction heating. The proposed inverter operates with high-frequency pulse-density modulation strategy for soft-switching. The high-frequency operation (20 kHz – 100 kHz) of this inverter results in a nearly sinusoidal output that is suitable for relatively fixed output applications such as induction heating. The series resonance circuit comprises an inductor and a capacitor that are in series with the load. The small size of resonating components is due to the high-frequency switching operation. The practical effectiveness of induction heating power supply is substantially proved by implementing a prototype series resonant inverter. To analyze the performance, comparison between the simulation and experimental results is done by using PSIM program

Keywords: Resonant inverters; Induction heating; High frequency; Switching losses; soft switching

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