Abstract

International audience; In this paper, an improved bidirectional resonant converter for wide battery voltage applications is proposed. The topology has a symmetrical resonant circuit which guarantees an identical behaviour for both energy transfer directions. The proposed converter has the capability to achieve soft switching for both bridges and the ability to operate under wide input/output voltage with narrow switching frequency variation. That increases the efficiency for both energy transfer directions. First harmonic approximation method (FHA) is used to define the equivalent circuit and to analyse the gain characteristics of the converter. Performances of the proposed converter for wide battery voltage application are evaluated through some simulations using Matlab/Simulink software.

Abstract

This article deals with the description of topology configuration of wireless energy transfer system. Wireless energy transfer systems are used in several applications areas as is wireless charging accumulators in electric vehicles, charging batteries in mobiles, in lighting applications and other. This article is focused on wireless charging accumulators in electric vehicles, which the main quality indicators are high transmitted power, high efficiency and the transmission distance in range of the ground clearance of standard vehicles. There are described two topologies, first is series - series compensated system and second is series - parallel compensated system.