A novel analysis and design assessment for series resonant converters operating above resonance

摘要

Different methods have been proposed to design Series Resonant Converters (SRC) based on the experience of designers and theoretical procedures. However, SRC either Zero Voltage Switching (ZVS) or Zero Current Switching (ZCS) states do not bring enough information about power switching losses of its circuit parameters, and have complicated tank waveforms based on geometry. This document proposes a novel design methodology applied to SRC operating above resonance frequency providing a technique to observe the switching states which affects the losses. The methodology establishes a link between the State Plane Analysis (SPA) and the converter design and also, defines the thresholds of the operation regions keeping in mind the state plane trajectories. The methodology is tested in hardware implementation demonstrating its applicability from the point of view of designer. Finally, future work and conclusions are given.