[17a-D221-1~10] 11.4 Analog applications and their related technologies

△ [17a-D221-9] Development of High Transfer Efficiency Wireless Power Transfer system using High Q Factor Superconducting Solenoidal Coil for small coil

〇(M1)Kai Ebihara¹, Takanori Uchida¹, Keita Sakuma¹, Naoto Sekiya¹ (1.Yamanashi Univ.)

Keywords:High Temperature Superconductor, Wireless Power Transfer

To provide stable and highly efficient wireless power transmission to a moving small coil, we fabricated a superconducting solenoidal coil. The fabricated superconducting solenoidal coil has a high Q-value that is about 13 times higher than that of copper coil by measurement. Transmission efficiency was improved by approximately 275% compared to the copper coil at the point where the coupling between the coils is weakest. In addition, the rate of decrease for the strongest coupling point relative to the weakest coupling point was smaller for the superconducting coil, We achieved stable and highly efficient wireless power transmission.