Contactless Power and Data Transfer for Electric Vehicle Applications

This paper discusses the use of contactless power and data transfer (CPDT) for charging electric vehicles (EV). The main contribution of this paper spans the analysis and development of the contactless power transfer (CPT) design, along with the practical implementation of the system prototype. The CPT system consists mainly of two parts; the transmitter and the receiver part. At the transmitter part there is a DC supply to supply power to the system. Then this DC will be converted to AC of high frequency through an inverter. Single-phase full bridge inverter is employed for this application. The AC voltage resulting from the inverter will be transferred through a coil from the transmitter side to the receiver side. This is achieved through a series resonant circuit in the transmitter and the receiver ends. After transferring the power to the secondary side of the system, it is used to charge the battery of the electric vehicle. Therefore a rectifier is needed to convert the AC to DC voltage. Data also is transferred wirelessly with the power in order to control the charging process for the electric vehicles with different proposed scenarios. A scaled down prototype has been tested experimentally for the CPDT. Despite tested for different air gaps, the implemented CPT system results are presented for an air gap of 1 cm.