Practical evaluations of single-ended load-resonant inverter using application-specific IGBT and driver IC for induction-heating appliance

This paper presents an efficient single-ended type high-frequency induction-heating quasi-resonant inverter circuit using a single advanced 2nd generation IGBT for soft-switching and its specially-designed driver IC, which operates at a zero-voltage soft-switching (ZVS) mode under PFM-based power regulation strategy. The generic voltage-fed and current-fed circuit versions of single-ended resonant inverters for home power electronics appliances are systematically proposed and classified on the basis of the soft-switched PFM mode inverter family. The advanced IGBT designed for the application-specific soft-switching and its driver IC are shown for a new induction-heating rice cooker including cooking vessel and evaluated from an experimental point of view. These new technologies are especially developed for quasi-resonant ZVS high-frequency inverter with working coil-linked induction-heating loads. This high-efficiency high-frequency quasi-resonant inverter system with high-power factor correction and sinewave line current shaping functions is practically demonstrated including a high-frequency IGBT with reduced saturation voltage characteristics, and discussed on the basis of high-power density home-power electronic appliances in the next generation