| 摘要 |
PURPOSE:To obtain a magnetic circuit which can transmit almost all the generated magnetic flux without an iron loss, by accommodating a magnetism-generating coil inside a loop-shaped hollow container formed of a superconductor, so that a loop direction axis and the central axis are in the same direction. CONSTITUTION:In a loop-shaped hollow container 1 made of a superconductor, which is provided with a gap 1a for forming a high resistance part over the full length in a loop direction, a coil 2 for generating a magnetic flux is accommodated so that the loop direction axis A thereof and the central axis B are positioned in the same direction, and a magnetic shielding space 3 formed by the container 1 is used as a magnetic circuit. Thereby almost all the magnetic flux generated by the coil 2 can be transmitted through the space 3 surrounded by the loop-shaped hollow container 1 made of the superconductor. Accordingly, an alternating-current magnetic flux having a much higher magnetic flux density than the one in the case of an iron core being employed, and in addition, no iron loss is caused. Due to the linkage of the coil 2 to a generated magnetic field, an alternating current I being reverse in phase to a current (i) of the coil 2 flowing through the loop-shaped container 1 made of the superconductor is checked by the gap 1a, and therefore the amount of transmission of the magnetic flux is not lessened. |
