超電導磁気浮上鉄道の磁気シールドの一設計手法 [in Japanese] A Design Method of Magnetic Shielding for a Superconducting Magnetically Levitated Train [in Japanese]
Access this Article
Search this Article
For EDS-type magnetically levitated trains, magnetic shielding of stray fields produced by superconducting magnets is an important task. We seek the 'optimal' thickness distribution (configuration) of magnetic material, which is the lightest and keeps the magnetic field at tolerable levels in the vehicle. In many cases, trial and error metohds have been adopted for this purpose. In this paper, we propose a new method for a preliminary design of the magnetic shielding. In this method, we simplify the magnetic shielding problem, assuming the infinite permeability of the magnetic material, and calculate the magnetic flux going into or out of the shield surface. In this case, we can design an optimal magnetic shield (distribution and configuration of the magnetic material) and know the minimum weight of the magnetic shielding. We finally show an example of the magnetic shielding designed by this method and investigate its characteristics in a magnetically levitated train.
- IEEJ Transactions on Sensors and Micromachines
IEEJ Transactions on Sensors and Micromachines 117(6), 733-742, 1997-06
The Institute of Electrical Engineers of Japan