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A new hybrid control scheme of the active-clamped class E (ACCE) inverter for an induction heating jar is presented. The proposed hybrid control scheme has characteristics that act as a class E inverter at lower switch voltages and ACCE inverter at higher switch voltages than the reference voltage of the main switch by feeding back voltage of the switch and also has advantages of conventional ACCE inverter such as zero-voltage-switching of the main switch and the reduced switch voltage due to the clamping circuit. The proposed hybrid control method using ACCE inverter also has higher output power than the conventional control scheme since the ACCE inverter is operated like a Class E inverter at low input voltage. The principles of the proposed control are explained in detail and the validity of the proposed control scheme is verified through several simulated and experimental results. [ABSTRACT FROM AUTHOR]

Abstract:A novel single-ended push pull (SEPP)soft-switching high-frequency inverter for induction-heating applications with a continuous output power regulation scheme at a .xed frequency incorporating a novel lossless snubber circuit is presented.Conventional SEPP high- frequency inverters have been .nding their home-electronic applications owing to their simpli .ed circuit constitutions.However,their soft-switching operations were restricted in a relatively narrow output power range when they were controlled by a PWM technique.The proposed high- frequency inverter topology is based on the conventional SEPP high-frequency inverter together with a novel lossless snubber circuit operated at an auxiliary resonant frequency so that it can be operated under soft-switching as well as PWM regulations.Hence,the soft-switching operation range of the proposed inverter can be widened considering accompanied by a high ef .ciency compared with the conventional SEPP inverter.Uses can include a home-cooking application with a high thermal ef .ciency and high safety at a .xed frequency of 20 kHz.The operating principle,is described and the results of computer-aided simulation analysis of the circuit operation and evaluation of the performance of the proposed inverter are given,which show its high utility. [ABSTRACT FROM AUTHOR]

Discusses a cost effective phase shifted pulse modulation soft switching high frequency inverter for induction heating applications. Theoretical equations for the soft switching operation region derived from the practical consideration of the gate pulse control strategy; Consideration given on how much the effect of soft switching can improve actual efficiency.

Introduces a single-switch parallel resonant converter for induction heating. Steady-state analysis of the converter operation; Improved modification of the single-switch AC-AC converter for induction heating applications.

Proposes a prototype of a series-load resonant and quasi-resonant hybrid-type soft-switching high frequency inverter for induction heating applications, together with its operating principle. Design procedure of circuit components to achieve a soft-switching the high frequency inverter; Reduction effect of switch peak voltage stress and its power regulation performance.