Title:
【発明の名称】磁気軸受装置及びこれを備えた真空ポンプ
Document Type and Number:
Japanese Patent JP3349679
Kind Code:
B2
Abstract:
To facilitate the fabrication work of a stator column assembly and improve full and wise use of resources, as well as to prevent contact accident between a mold portion of a stator column and a rotor shaft due to the thermal inflation. A first electromagnet unit (30), a stator coil unit (20), and a second electromagnet unit (40) are engaged to and arranged in a cylindrical stator column (11) in the order stated, the first electromagnet unit (30) comprising an electromagnet (31) of a first active radial magnetic bearing and a radial displacement sensor (32) for the electromagnet (31) which are attached in a first circular holding member (30c) to be coated and molded with a resin mold (30d), the stator coil unit (20) comprising a stator coil (21a) that is attached in a circular yoke member (20c) to be coated and molded with a resin mold (20d), the second electromagnet unit (40) comprising an electromagnet (41) of a second active radial magnetic bearing and a radial displacement sensor (42) for the electromagnet (41) which are attached in a second circular holding member (40c) to be coated and molded with a resin mold (40d).
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Inventors:
Yasushi Maeshima
Application Number:
JP9204999A
Publication Date:
November 25, 2002
Filing Date:
March 31, 1999
Export Citation:
Assignee:
BOC Edwards Technologies, Inc.
International Classes:
F04D19/04; F04D29/04; F04D29/058; F16C32/04; F16C39/06; (IPC1-7): F16C32/04; F04D19/04
Domestic Patent References:
| JP9291832A | ||||
| JP893687A | ||||
| JP719244A | ||||
| JP854020A | ||||
| JP8140305A | ||||
| JP1061584A |
Attorney, Agent or Firm:
Yoshiharu Matsushita