Analysis of a Bidirectional Resonant Converter for Wide Battery Voltage Range in Electric Vehicles Application
Résumé
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.
Mots clés
Batteries
Soft switching
Resonant converters
Bridge circuits
Voltage control
Zero voltage switching
Energy exchange
approximation theory
electric vehicles
equivalent circuits
resonant power convertors
switching convertors
zero current switching
zero voltage switching
narrow switching frequency variation
energy transfer directions
wide battery voltage application
electric vehicles application
symmetrical resonant circuit
switching frequency variation
wide input-output voltage
bidirectional resonant converter analysis
soft switching
harmonic approximation method
FHA
equivalent circuit
Matlab/Simulink software
