Electromagnetic-thermal coupling model of 500kJ HTS energy storage magnet

Due to the existence of pinning centers in high-temperature superconducting materials, when a changing current is applied to the superconductor, the Lorentz force must overcome the pinning force to do work and generate heat energy, that is, AC loss. AC losses are heat, which can adversely affect high temperature superconductors that need to maintain a low temperature operating environment. The AC loss will not only increase the cooling cost of the superconducting magnet, but also cause the temperature of the magnet to increase, affecting the performance and stability of the high-temperature superconducting magnet. In this paper, an electromagnetic-thermal coupling model of the AC loss of high-temperature superconducting magnets is introduced, and the loss and temperature calculation of superconducting magnets can be realized by means of direct coupling.