An Evaluation on the Non-smoothed DC-Link Stage of a New Bridgeless Boost Half-Bridge ZVS-PWM Frequency Converter for HF Induction Heating Applications

Abstract

A practical evaluation of a new bridgeless boost half-bridge zero voltage switching (ZVS) pulse-widthmodulation(PWM)-controlled utility ac (UFAC) – high frequency ac (HFAC) converter for induction heating (IH) applications is presented in this paper. The non-smoothed dc link capacitors in the frequency converter have a great relevance with power factor correction (PFC) of the source side and voltage boost ratio in the IH load side as well as ZVS range of the active switches. Theoretical and experimental analyses on the dc-link stage are described in details and the effectiveness of the frequency converter is discussed.