A Reconfigurable Magnetic Integrated Transmitter-Based Multimode WPT System for Electric Bicycle Charging
Lin Yang, Shujia Xu, Yilin Wang, Jianbo Jiang, Yanyan Shi, Meng Wang, Changsong Cai
Abstract
Since electric bicycles (EBs) of different specifications are equipped with different numbers of batteries, it is crucial that the wireless power transfer (WPT) system can output voltages of different specifications to charge the EBs. This paper proposes a reconfigurable magnetic integrated transmitter based multi-mode WPT system that enables charging of different EBs. The transmitter consists of two coupling coils integrated together to change the operating mode of the proposed system. By reconstructing the coupling circuit on the transmitter, the proposed system can selectively operate in two-coil structure for constant current (CC) mode and two three-coil structures for two constant voltage (CV) modes. Two three-coil structures can output two different voltage specifications, meeting the charging needs of two different specifications of EBs. Therefore, the proposed system is highly versatile. An experimental prototype with 2.2A/66V/78V charging configuration is built to verify the feasibility and practicality of the proposed system.