Implementation of a Bidirectional 400-800V Wireless EV Charging System

A non-contact isolated bidirectional symmetrical resonant converter with dual active bridge as the main structure is proposed in this study. This scheme is combined with the symmetrical resonant network and integrated into an isolated bidirectional symmetrical resonant conversion circuit. The symmet...

Full description

Saved in:
Bibliographic Details
Published in:IEEE access 2024, Vol.12, p.26667-26682
Main Authors: Wu, Sen-Tung, Chiu, Yu-Wei
Format: Article
Language:English
Subjects:
Batteries
Bidirectional control
Bidirectional resonant converter
Digital signal processors
Discharge
Electric bridges
Electric potential
Electric vehicle charging
Electromagnetic noise
Inductors
loosely coupled inductor
Microprocessors
Rectifiers
Resonant converters
RLC circuits
soft switching
Switches
Switching
symmetric resonant circuit
Vehicle-to-grid
Voltage
Voltage control
Wireless communication
Wireless power transfer
Wireless power transmission
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A non-contact isolated bidirectional symmetrical resonant converter with dual active bridge as the main structure is proposed in this study. This scheme is combined with the symmetrical resonant network and integrated into an isolated bidirectional symmetrical resonant conversion circuit. The symmetrical resonance technique is used in this work to realize the voltage regulation of a wide range of output and the function of soft switching under the appropriate operating frequency; reduce the electromagnetic noise and power loss caused by hard switching of power switches in the circuit; and improve the overall converter efficiency, voltage regulation, and hard switching from conventional bidirectional converters. In addition, a pair of non-contact loosely coupled inductors (wireless coils) is used to replace the conventional transformer to transfer the bidirectional energy wirelessly. The digital signal processor TMS320F28335 is the control core of the system in this study. The proposed converter with DC grid input voltage is set to 400 V, and the EV battery side is set to 670-800 V. The rated power capacity of the bidirectional wireless charger is 2 kW. Besides, the proposed bidirectional wireless EV charger has CC-CV charging function to achieve the EV charging requirement. Finally, the maximum efficiency of forward charging mode (grid to vehicle [G2V; 400 V charge to 800 V]) can reach 90.2% while that of reverse discharging mode (vehicle to grid [V2G; 800V discharge to 400V]) can reach 91.4%.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2024.3366997