Superconducting magnets used in particle accelerators produce magnetic fields of high precision and uniformity to bend or focus the particle beam. For such magnets, the development of accurate and efficient numerical methods for the evaluation of the magnetic fields is of high importance. This work presents a hybrid Finite/Boundary Element Method (FEM/BEM) scalar potential formulation,...
The No-insulation (NI) REBCO as an insert magnet has been applied to overcome the field limitation of LTS NMRs. So far, NI REBCO pancake coils have shown a “self-protecting” characteristic in experiments and, consequently, basic mechanism of self-protecting from thermal runaway has been widely studied by analyses under a low magnetic field or cooled by liquid nitrogen. However, several HTS...
Due to the extensive application of soft magnetic materials in transformers, motors, reactors and other electrical equipment, the research of accurate iron loss prediction method becomes an indispensable part to ensure the safe operation of power system and to realize the optimal design of electrical equipment. However, the development of appropriate methods for predicting iron loss is...
The magnetic system comprising all the superconducting poloidal coils is an important part of the Divertor Tokamak Test facility (DTT). It is composed of several parts mutually coupled among them: six Central Solenoid (CS) modules, six Poloidal Field (PF) coils, the passive structures and the plasma. This implies that a current variation in any poloidal coil can cause a significant current or...
To get an understanding of the magnetic field distribution in a superconducting magnet, computer simulations are needed which take into account the actual geometry of the magnet and the magnetic saturation in different materials. It is a further advantage that the software efficiently tackles the large number of unknowns needed for accurate 3D simulations and also allows the coupling of...
Compared with conventional power cables, high-temperature superconducting cables (HTS) have the advantages of large current capacity, low loss, compact structure, and no electromagnetic radiation. With the continuous improvement of electricity consumption in all of the world, HTS cables are of great significance to improving the transmission capacity of power systems. Because the HTS cable has...
An advanced hybrid numerical method for the solution of nonlinear magnetostatic problems in superconducting accelerator magnets is proposed. The methodology is implemented in PITHIA-EM software and couples the Fragile Points Method (FPM) with the Boundary Element Method (BEM). The FPM is a Galerkin-type meshless method, based on a Discontinuous Galerkin weak form where simple, local, and...
The enhancement of the acceleration performance of a superconducting linear acceleration (SLA) system to inject the pellet container to supply fuel to the fusion reactor has been investigated numerically. To this end, a numerical code used in the finite element method has been developed for analyzing the shielding current density in a high-temperature superconducting film. In addition, the...
Several ultra-high magnetic field (>20 T) REBCO magnets are under development for fundamental research or practical applications. A few quench protection techniques, such as a no-insulation winding technique and a temperature rise technique by heaters, were proposed to protect REBCO magnets from thermal runaway and burning-out. Meanwhile, it was reported that REBCO tapes were plastically...
Bearingless switched reluctance motor (BSRM) has the advantages of simple structure, no winding and permanent magnet on rotor, low cost, good robustness, strong fault tolerance and strong environmental adaptability. Therefore, the BSRM has broad application prospects in the field of high-speed direct drive system, such as aerospace, high-speed flywheel and turbo molecular pump.
The levitation...
