Electric Vertical Takeoff and Landing (eVTOL) aircraft is attracted as a new means of transportation. The vertical takeoff consumes much amount of energy, leading the limitation of range and payload. To address this problem, we proposed a new method of takeoff by using a launch system for eVTOL with fixed wings. The eVTOL is accelerated by a linear motor mounted on the system. When the eVTOL...
Naval minesweeping is a crucial initial operation in naval warfare, ensuring safe passage for friendly forces by clearing sea lanes of mines deployed by adversaries. Current minesweeping methods utilize permanent magnets or copper cables to trigger magnetic mines. Generating stronger magnetic fields enables the clearance of deeply laid mines and the replication of larger vessels' signatures....
Aluminum die-casting requires an efficient melting technology to conserve energy, because aluminum die-casting process produces a large amount of aluminum casts and consumes huge quantity of energy. We have suggested the possibility of supplying molten aluminum to the die-cast process in a short time by DC induction heating using a superconducting magnet. In our DC induction heating equipment,...
Electromagnetic forming (EMF) is a significant application direction of pulsed high magnetic fields. As a high-speed forming technique, EMF offers typical advantages associated with high forming rates, such as enhancing the material forming limit, suppressing wrinkling and springback. Additionally, the driving force in EMF is a non-contact force, eliminating the need for a force transmission...
Bi-2212 round wire offers advantages in low screening current due to its filament structure compared to REBCO tapes among high-temperature superconductors (HTS). Additionally, established methods for creating superconducting joints are well known for Bi-2212. These characteristics have led to extensive research into its use in nuclear magnetic resonance (NMR) magnets, which require high...
Hot-dip galvanizing is a widely used method for protecting steel workpieces from corrosion, and controlling the coating thickness through wiping is crucial for ensuring both product quality and performance. Traditional gas wiping technology, though widely used, faces challenges, including air pollution, coating oxidation, uneven coating distribution, and difficulties in precise thickness...
The no-insulation (NI) technique has been widely used in the development of high temperature superconducting (HTS) magnets. The compact 23 T NI-HTS magnet consists of pocket-sized double pancake coils was developed and reported. Therefore, it has been demonstrated that NI HTS coils are suitable not only for large-scale, high-field applications but also for small-scale, high-field applications....
Electromagnetic forming (EMF), a critical application of pulsed magnetic field technology, is extensively utilized in manufacturing lightweight automotive components and high-precision aerospace structures. The process involves rapidly discharging high-energy pulsed currents from a capacitor bank into a coil, generating a transient, intense magnetic field. When a conductive workpiece is placed...
High-temperature superconducting (HTS) Maglev trains are gaining attention as a next-generation transportation technology due to their high efficiency and ultra-high-speed capabilities. However, losses occurring during operation significantly impact system stability and the maintenance of the target magnetic field. In particular, in PCS (Persistent Current Switch)-based HTS Maglev trains,...
