A Node Role Dynamic Change Method Among Repeater, Receiver, and Decoupling Using Topology Switching in Multinode WPT System

In the multidevice application of wireless power transfer (WPT) technology, classical method cannot balance power transfer efficiency, transfer distance, and dynamic power variation requirements. For multinode WPT system, this article proposes a flexible repeater power transmission mode characterized by node role change function. Each node role can be flexibly switched among repeater, receiver, and decoupling by using a topology switching method to satisfy dynamical repeater power transmission requirements, which is realized by a reusing topology and without additional circuit. Furthermore, the topology switching method is studied to verify that the transition is smooth in dynamic switching. Besides, this article also analyzes the system performances in different operation modes. The experimental results verify the effectiveness of the proposed method.