Two-switch boost-half bridge and boost active clamped ZVS-PWM AC-AC converters for consumer high frequency induction heater

This paper presents a two-switch boost-half bridge one stage power conversion circuit topology of commercial single-phase utility frequency AC fed ZVS-PWM power converter with harmonic current suppression and unity power factor correction functions. This cost effective utility frequency AC (UFAC) to high frequency AC (HFAC) power converter is developed for consumer induction heating (IH) appliances. This two-switch boost-half bridge one stage UFAC to HFAC power converter includes some advantages as simple configuration and control scheme, low cost, utility AC side harmonic current reduction with unity power factor, and constant frequency ZVS-PWM for power regulation. Its operating principle is described and discussed herein. In addition to this, its operating performances are illustrated and estimated on the basis of simulation and experimental results. An active voltage clamped ZVS-PWM high frequency inverter with boost function and its characteristics are also evaluated as compared with two-switch boost-half bridge power converter treated here