| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor integrated magnetic bearing device, which simplifies the constitution of a controller for stably controlling, and enables the high-speed rotation of a main shaft even in a state where a motor operates under high load, and the excessive axial load is applied to the motor. SOLUTION: The motor integrated magnetic bearing device uses roller bearings 15 and 16 jointly with a magnetic bearing. The roller bearings 15 and 16 support the radial load. The magnetic bearing supports either axial load or bearing preload or both. Two thrust plates 13a and 13b are disposed at a distance in the axial direction. The two thrust plates 13a and 13b have an electromagnetic target in one side and a permanent magnet 28aa for a motor rotor 28a in the other side. A sensor 18 is provided to detect the axial force acting on the roller bearings 15 and 16. According to the output, the controller 19 is provided to control the magnet 17. COPYRIGHT: (C)2007,JPO&INPIT
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