Magnetic bearing spindle

Details Magnetic bearing spindle Magnetic bearing spindle

2007-05-29

2007-05-29

Tamai, Karl Imayoshi (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S058000

Reexamination Certificate

active

10486984

ABSTRACT:
A magnetic bearing spindle includes a radial magnetic bearing rotor fabricated by laminating a ring-like plate made of electromagnetic steel sheet, an axial magnetic bearing rotor made of magnetic material, and a main shaft motor rotor. A rotation shaft is fit rotatably in these rotors and a plurality of electromagnets are disposed around the rotation shaft. A bracket is provided with a cooling air supply port, and an air passage is provided in a frame. An outer peripheral portion of the axial magnetic bearing rotor is provided with a triangular portion. An outer peripheral portion of an axial direction positioning collar of an axial magnetic bearing stator is provided with through holes. Cooling air is supplied from the through holes.

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Masahiro Ohtani et al. Ultrahigh Speed Processing by Magnetic Bearing Main Shaft and Application of the Same, Mitsubishi Denki Giho, Oct. 2001.

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