2023 Volume 58 Issue 1 Pages 11-18
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.
