Transmission Characteristic and AC Losses of a Novel Multi-Module HTS Suspension Power Supply System

High temperature superconducting (HTS) coated conductor (CC) coils capable of carrying high current and extremely low resistance could be introduced into the wireless power transfer (WPT) devices to improve the transmission efficiency and transmission power. In this paper, A Novel Multi-Module HTS Suspension Power Supply System has been constructed to achieve both WPT and suspension functions. One HTS bulk and four permanent magnets are installed in the transmitting module and receiving module of the system to execute stable suspension by utilizing the strong pinning ability of the HTS bulk. Through experimental testing, the variations in receiving voltages of the HTS suspension power supply system were summarized under different number and arrangements of receiving modules, aiming to identify the optimal operating conditions for the system. Additionally, a mathematical model of the HTS coil under this structure was constructed using the finite-element method (FEM) based on the H-formulation. At the operating frequency of 35 kHz, the ac loss of the superconducting coil reached 0.08 J, and it is minimally affected by the permanent magnets within the suspension structure.