Conceptual Design and Experimental Research of Fast Wireless Power Charging Units Including Supercapacitors for Superconducting Hyper Loop Train

The technology of the magnetic resonant of wireless transfer (MRCWPT) has been expected as one of reasonable options as a convenience and safety high power sources for industrial and transportation applications such as self-driving electric vehicles, trams and high speed Hyperloop trains since the conventional wire power lines (pantograph) elevates tunnel construction costs as well as degrades stability in the high speed transportations such as superconducting levitation (MAGLEV) and Hyperloop trains. In the transportations with high speed and high power, the high temperature superconducting (HTS) levitation magnets, which can keep strong levitation force, have been preferred since the strong levitation force by the HTS magnets can reduce the instability of contacting surfaces. Generally, the wireless power charging unit for HTS levitation magnet as a power supply has intrinsic hurdles towards accumulating energy storage due to inductance time constant of the magnet. As well as, the economic costs of equipment for high power RF generator and a high performance rectifiers with high current density should be considered. Recently, the use of supercapacitors (super Cs) is rapidly increasing in energy storage applications such as handheld industrial equipment, portable devices with removable batteries, industrial sensors and actuators, since the super C can deliver higher power densities with lower voltage limits. From these reasons, in this paper, authors examine feasible investigations and fundamental performances of the fast wireless power charging including super C (FWPCS) with one super C module of 58 F under 200 W 370 kHz RF generator as a wireless power charging unit for HTS magnet with high energy density.