Normal Transition Simulation on Toroidal HTS-SMES Considering Electromagnetic and Thermal Characteristics

Abstract

We previously investigated the stability of toroidal HTS-SMES magnets by simulation. The simulation took an electric circuit and a magnetic field phenomenon into account. However, a thermal condition is an important factor in investigating the behavior of an HTS-SMES magnet. Therefore, we have improved the previously developed simulation code to consider the thermal phenomenon. With the newly developed numerical simulation, we have investigated a time transition of a coil current, a critical current, and a temperature in the toroidal HTS-SMES magnets. As a result, it was confirmed that the temperature of all the HTS coils rose up quickly one after another, after the temperature at a certain local area of one HTS coil was increased.

Overturning Force Simulation on Normal-State Transition of Toroidal HTS-SMES Taking Into Account an Electromagnetic and Thermal Condition

“…Table I and II show the specifications of the designed toroidal HTS-SMES magnet. Please refer to [9] in order to know more detail.…”

“…However, it becomes obvious that the thermal behavior affects the behavior of the overturning force during the chain of normalstate transitions [9]. Therefore, we coupled the thermal analysis with the previously developed electromagnetic and circuit simulation.…”