Transfer Efficiency and Cooling Cost by Thermal Loss based on Nitrogen Evaporation Method for Superconducting MAGLEV System

29th International Symposium on Superconductivity

Chung, Y.D.^1 ; Kim, D.W.^2 ; Lee, C.Y.^3

Dept. of Electrical Engineering, Suwon Science College, Kyounggi-do

18516, Korea, Republic of^1

Dept. of Electrical and Electronic Engineering, Yonsei University, Seoul

03722, Korea, Republic of^2

Korea Railroad Institute (KRRI), Kyounggi-do

16105, Korea, Republic of^3

关键词: Copper resonance;    Evaporation method;    Superconducting Maglev;    Superconducting technology;    Transfer efficiency;    Transfer ratio;    Transmission ratios;    Wireless power transfer (WPT);   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/871/1/012095/pdf
DOI  :  10.1088/1742-6596/871/1/012095

来源: IOP

【 摘 要 】

This paper presents the feasibility of technical fusion between wireless power transfer (WPT) and superconducting technology to improve the transfer efficiency and evaluate operating costs such as refrigerant consumption. Generally, in WPT technology, the various copper wires have been adopted. From this reason, the transfer efficiency is limited since the copper wires of Q value are intrinsically critical point. On the other hand, as superconducting wires keep larger current density and relatively higher Q value, the superconducting resonance coil can be expected as a reasonable option to deliver large transfer power as well as improve the transfer ratio since it exchanges energy at a much higher rate and keeps stronger magnetic fields out. However, since superconducting wires should be cooled indispensably, the cooling cost of consumed refrigerant for resonance HTS wires should be estimated. In this study, the transmission ratios using HTS resonance receiver (Rx) coil and various cooled and noncooled copper resonance Rx coils were presented under non cooled copper antenna within input power of 200 W of 370 kHz respectively. In addition, authors evaluated cooling cost of liquid nitrogen for HTS resonance coil and various cooled copper resonance coils based on nitrogen evaporation method.