| 摘要 |
PROBLEM TO BE SOLVED: To control a gap between a rotating shaft and a magnetic bearing in correct conditions at all times by correctly detecting the gap between the rotating shaft and the magnetic bearing, and controlling on the basis of the detected value. SOLUTION: The rotating shaft 5 provided integrally with a flywheel 6 is rotatably supported by magnetic bearing units 3, 4 in a noncontact state. The magnetic bearing units 3, 4 comprises rotors 8a, 8b for bearings mounted on the periphery of the rotating shaft 5, and magnets 7a-7d and 7e-7h for the bearings which are fixed to a housing in opposition to the rotors. In recesses 30, 31 made on both ends of the rotating shaft 5, the rotors 8a, 8b for bearings, and position sensors 9, 10 are held so as to detect gaps between the bearing magnets 7a-7d and 7e-7h respectively. The position sensors 9, 10 are located at an equal height to the magnets 7a-7d and 7e-7h for bearings respectively in the axial direction (A-B) of the rotating shaft 5. COPYRIGHT: (C)2007,JPO&INPIT
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