Design of resonant network based on power losses analysis of series resonant converter for on-board battery charger in EVs

This paper describes the process of the design of resonant network through power losses analysis of full-bridge series resonant converter in a high efficiency 3.3kW on-board battery charger application for electric vehicles. The losses of switching devices and passive components with transformer are analyzed theoretically by considering losses in the charging area of high voltage Li-ion battery. In addition, theoretical procedures based on losses analysis are possible to optimal design of resonant network in series resonant converter for on-board battery charger application. The parameters and result of the process can be used for analyzing the variation of size and losses. The proposed design process can be verified through calculations in every frequency domain by comparing with operation area.