ABSTRACT Induction heating (IH) systems are widely adopted in household appliances thanks to their energy efficiency and inherently safe operation. To maximize performance, resonant inverter circuits are frequently employed in IH applications due to their capability for soft‐switching and high efficiency. Among the various resonant inverter topologies, the single‐switch quasi‐resonant (SSQR) inverter stands out as a cost‐effective solution, particularly in systems with lower power requirements. However, this topology has a relatively limited soft‐switching range, and its stability can be affected by variations in the electrical characteristics of the load and the resonant circuit components. For optimal design and reliable performance, it is essential to precisely determine the values of the resonant capacitor and the induction coil, which are central components of SSQR‐based IH cookers. These parameters significantly influence the interaction between load behavior, resonant circuit characteristics, and safe operation boundaries. Moreover, in systems with closed‐loop control for power regulation and safety management, careful selection of resonant elements is fundamental to achieving both efficiency and reliability. This study introduces a refined design approach for SSQR inverters used in residential IH devices. The method's effectiveness is analyzed theoretically and validated through both simulations and prototype testing.
Gonullu et al. (Fri,) studied this question.
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