Abstract
In this paper, the design procedure of an electric vehicle (EV) wireless charger is presented. Unlike most of the systems available in the literature, the proposed charging system is regulated from the vehicle side. The on-board electrical circuit automatically adapts the resonant compensation to guarantee compatibility with the primary inverter characteristics and achieve high transmission efficiency without communication between sides. Moreover, the proposed control strategy, used to regulate the secondary full active rectifier (FAR), allows the supply of the the EV battery, maximizing the efficiency during the whole charging process.
Highlights
Over the last few years, wireless power transfer (WPT) has attracted increasing interest from academia and industry for its promising application to electric vehicle charging
When the secondary side consists of an active rectifier coordinated with the primary side through a communication channel, the system is called a dual side controlled system (DSCS)
As mentioned in the previous section, this paper aims to design an electric vehicle (EV) system able to charge a battery with Po = 3.7 kW, ensuring the maximum transmission efficiency ηmax during the whole charging process
Summary
Over the last few years, wireless power transfer (WPT) has attracted increasing interest from academia and industry for its promising application to electric vehicle charging. The large air gap between coils leads to operation with low coupling coefficients [2,3,4] For this reason, compensation networks are usually used to increase the power and transmission efficiency. The coils of these systems are operated at high magnetic fields, which can interfere with data communication [9] Even if this solution exhibits these disadvantages, the adoption of a communication channel represents the most used solution when the charging process is controlled by the primary inverter. When the secondary side consists of an active rectifier coordinated with the primary side through a communication channel, the system is called a dual side controlled system (DSCS) These systems have a greater number of degrees of freedom, allow the achievement of high conversion efficiencies, and entail high costs, and their operating reliability is closely connected to the communication link between the two sides [15,16].
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