| 摘要 |
PROBLEM TO BE SOLVED: To get favorable propulsion, levitation, and guidance performance while lessening vibration of a superconducting magnet by exciting force of an 8-shaped coil for propelling, levitating, and guiding a vehicle, in a magnetic levitation movable body system. SOLUTION: To reduce the vibration of the superconducting magnet, it needs to select a coil pitch that exciting force frequency and a generated vibration mode do not match with each other. In 90°pitch in which four pieces of coils are provided for 360°of electric angle of the superconducting magnet, the exciting force of the adjacent coil comes to the same phase, and resonance frequency which causes the vibration mode of the superconducting magnet as a whole becomes large, whereas the exciting frequency is small. Accordingly, as a coil pitch for the vibration of the superconducting magnet, a pitch of 90°is advantageous. COPYRIGHT: (C)2003,JPO
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