A Reconfigurable WPT System With CC‐CV Charging and Power Extension Capabilities

Fast charging is one of the development trends in the EV industry. Based on this, a reconfigurable WPT system with CC‐CV charging and power extension capabilities is proposed in this paper. The proposed WPT system consists of a reconfigurable transmitter and two receivers, where the second receiver utilizes a SAR structure. In CC charging mode, the proposed WPT system adopts a parallel output architecture with dual receivers to extend the output power effectively. In the CV charging mode, single‐transmitter and single‐receiver operations are realized by topology switching, while the receiver with SAR structure acts as a compensation coil. It is worth noting that this paper also proposes a topology switching method without communication system to improve the reliability and practicality of the proposed WPT system. Secondly, the proposed WPT system can also realize ZVS and ZPA operation in CC and CV charging mode, respectively. Then, the current equalization of the two receivers can also be realized in the CC charging mode by a reasonable parameter design. Thus, the output power of the two receivers can be extended up to four times compared to a single receiver under the same voltage and current stress conditions. Finally, an experimental prototype was setup and the experimental results verified the effectiveness of the proposed WPT system.