Generalized Design Methodology for PSM LCC Resonant DC‐DC Converters With Tank Circuit Peak Voltage and Current Minimization

ABSTRACT Reducing the losses thereby increasing the efficiency of the converter and increasing the power density are the primal focus points of the designer while designing most of the converters. In this paper, a generalized design methodology for a phase shift modulated (PSM) DC‐DC LCC resonant converter is proposed. The converter's AC equivalent circuit is analyzed using the first harmonic approximation (FHA) method to derive the tank circuit's various current, voltage, and power equations. These equations are generalized in terms of quality factor, frequency, and gain. Design curves are plotted with the help of these equations. Based on the designer's requirements and the availability of the components, these design curves are used for finalizing the generalized values. This paper focuses on designing the PSM DC‐DC LCC resonant converter for minimal voltage and current peaks on the tank circuit. Another important factor for designing the converter while using passive elements in the topology is reactive power. The analysis provided in the paper accounts for a minimal reactive‐to‐active power ratio. The designed converter's properties are verified by simulation and experimental results from a 200‐W prototype achieving an experimental maximum efficiency of 96.22%.