| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor integrated magnetic bearing device for improving the long-time durability of a rolling bearing to a thrust load while enabling the high-speed rotation of a spindle. SOLUTION: The motor integrated magnetic bearing device uses a combination of rolling bearings 15, 16 and a magnetic bearing. An electromagnet 17 as part of the magnetic bearing is mounted to a spindle housing 14 so as to be opposed to thrust plates 13a, 13b provided on the spindle 13 in no contact. Each of the thrust plates 13a, 13b has an electromagnet target formed on the single side and a permanent magnet 28aa arranged on the other face for a motor rotor 28a. A motor stator 28b is arranged so as to be held around the permanent magnet 28aa. A motor 28 is an axial gap type coreless motor whose motor stator 28b has a plurality of concentrated winding type coils 28ba. The coils 28ba are divided into a plurality of peripheral modules integrated with one another. COPYRIGHT: (C)2008,JPO&INPIT
|
