Abstract
This paper presents a novel type of voltage-fed quasi-load resonant half-bridge IGBT inverter operating at constant frequency variable power regulation scheme which is more suitable and acceptable for new high-frequency high-power induction-heated (IH) cooking appliances in domestic and business uses. This application-specific high-frequency inverter using a new generation specially-designed IGBTs can be efficiently operated under the principle of ZVS-PWM control strategy. The operating principle of a new inverter circuit is presented together with its power regulation characteristics on the basis of its computer simulation analysis and experimental results. The steady-state characteristics of the cost effective quasi-resonant inverter developed for high-frequency IH cooking appliances, such as IH rice cooker/warmer and IH hot water heater, are discussed from a practical point of view.
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