Steady-State Analysis Of The Parallel Resonant Converter With Llcc-Type Commutation Network

By using a proper transformation of state variables, a steady-state analysis for the 4th order high frequency LLCC-type parallel resonant converter (PRC-LLCC) operating in the continuous conduction mode is presented. The method makes use of the twodimensional state-plane diagram which has been used successfully to analyze resonant converters of lower order. Based on this analysis, a set of control characteristic curves have been derived from which a comparison between this converter and the conventional PRC is presented. Our theoretical results are verified by computer simulations. A design procedure with a specific design example will be also given. © 1991 IEE