An Instantly Reconfigurable 2-D Wireless Power Transfer System

Wireless charging pads such as Qi are rapidly gaining ground, but its limited power supply range still requires precise placement on a specific point. 2-D wireless power transfer (WPT) sheets consisting of coil arrays are one well-known solution for this issue. However, these approaches require custom-made designs by experts; what we need is a system that can be reconfigured by simply placing ready-made modules on the intended surface. To solve these issue, we present a reconfigurable 2-D wireless charging system which enables such simple construction of wireless charging surfaces. Our system can instantly and interactively form wireless charging surface on everyday objects (e.g. floor, wall, table, etc.) only by placing resonator modules.


  1. K. Sumiya, T. Sasatani, Y. Nishizawa, Y. Narusue, K. Tsushio, Y. Kawahara, “Demo: A Reconfigurable 2-D Wireless Charging System,” Adjunct Proc. of ACM Ubicomp 2018, Singapore, Oct. 2018.

  2. Y. Narusue, A. Hashizume, T. Sasatani, X. Shi, Y. Mizutani, Y. Kawahara, and T. Asami, “Indoor Wireless Power Transfer,” TECO Green Tech Contest 2016, Taipei, Taiwan, Aug. 2016.

  3. 角谷和宣,西澤勇輝,笹谷拓也,橋詰新,成末義哲,川原圭博,“二次元共振器アレイを用いた給電領域を自由に変更可能な無線給電システムの構成,” 電子情報通信学会 総合大会,B-18-15,March 2018.