| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact static pressure magnetic combined bearing combining superior dynamic rigidity and high rotating accuracy of a static pressure gas bearing and superior static rigidity of a magnetic bearing, allowing the setting of the optimum bearing gap by designing the material quality of a rotor and actualizing higher accuracy and more compactness of the static pressure gas bearing and the magnetic bearing, no heating due to a reduction in core loss and higher speed rotation. SOLUTION: The magnetic bearing and the static pressure gas bearing 9 having a restrictor 15 in a bearing stator 12 of the magnetic bearing are provided side by side for supporting the rotor 4 in non-contact. The magnetic bearing has a displacement measuring means for measuring the displacement of the rotor 4 and generates electromagnetic force in accordance with a measured value for the displacement measuring means. A laminated silicon steel plate is used for the rotor 4 and a ceramics coating layer 33 of a thickness of 1 mm or less is applied onto the laminated silicon steel plate. COPYRIGHT: (C)2005,JPO&NCIPI
|
