Theoretical analysis of the efficiency of a V2G wireless charger for Electric Vehicles

Abstract

V2G (Vehicle-to-grid) technology will report important benefits for the operation and safety of the grid. In order to facilitate the expansion of the V2G technology in a future, it is recommended to offer the drivers with easy to use methods to charge and discharge their EV batteries. In this sense, wireless chargers are expected to play a relevant role in the future electrical networks as it reduces the users intervention. The development of this kind of system is still open to improve them in terms of their operation, their compliance and their control. An important issue for the evaluation of these systems is the efficiency, which measures the power losses occurring in the system. This paper addresses a deep study about the losses in a bidirectional wireless charger. Then, it provides with a mathematical model to characterize them. This model is validated by means of experimental results conducted in a 3.7-kW prototype.

Review on Control Techniques for EV Bidirectional Wireless Chargers

“…In this approach, the flow of the active power is easily adjusted, and the expected efficiency can be computed as in [58]. There must be coordination between the power converters to set the configuration in both controllers.…”

Overview and Advancements in Electric Vehicle WPT Systems Architecture

“…Some of the prospects of the study is the optimization of the system to allow load balancing, filling and peak shaving [10,11]. A mathematical model for the estimation of the charge and discharge efficiency in an EV bidirectional ICPT wireless charger was presented [12]; the WPT system was characterized and validated experimentally using a 3.7 kW prototype. It was suggested that V2G systems need improvement in operational mechanism, compliance and control.…”