Motor and recording disk drive device provided with the same

Details Motor and recording disk drive device provided with the same Motor and recording disk drive device provided with the same

2007-12-13

2008-11-25

Lam, Thanh (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S216055, C310S256000

Reexamination Certificate

active

07456540

ABSTRACT:
In a spindle motor, a core includes a plurality of core plates, which are laminated one on another. The core is constituted by laminating two cores, that is, a first core and a second core, which are different from each other in shape of a surface facing to a rotor magnet. At least a part of a cogging torque generated at the second core can be cancelled by a cogging torque generated at the first core.

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