高温超電導コイルを用いた大容量かつ高効率な非接触給電システム

―鉄道用非接触給電システムの急速充電化を目指して―

抄録

We have been investigating a Wireless Power Transmission (WPT) system for railway vehicles as a tool to reduce the greenhouse gas emissions in diesel vehicles. Since the WPT system for railway vehicles is required to transmit electric power of several hundred kW in a short time, it is difficult to suppress heat generation by the internal resistance of a copper coil. Therefore, we have investigated the WPT system using a high-temperature superconducting (HTS) coil for railway vehicles. This paper describes the Q values of the HTS coil and the copper coil, a low-loss HTS coil structure with a gap between layers suitable for the WPT system, and the design guidelines for the WPT system of railway vehicles using HTS coils.