An approximate steady state and small signal analysis of the parallel resonant converter running above resonance

A half bridge parallel resonant converter (PRC) running above resonance in the constant output voltage mode is analysed. The steady state analysis the small signal analysis, and the regulation of the power converter are reviewed. An approximated steady state analysis for the constant output voltage mode is reviewed. This analysis is based on an AC equivalent circuit using the fundamental wave of the rectangular input voltage of the resonant tank. Although approximated, the AC equivalent circuit provides physical insight into the behaviour of the PRC since the higher order harmonics of the resonant voltage across the resonant converter are negligible, if the converter operates above resonance. After steady state analysis, design considerations for the PRC running above resonances are given.<
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