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Low-profile spindle motor for 5-mm-height PCMCIA disk drive

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4 Author(s)
Y. Kuroba ; Fujitsu Labs. Ltd., Atsugi, Japan ; T. Yamada ; K. Aruga ; Y. Mizoshita

We developed a new spindle motor with a unique structure for PCMCIA Type-II magnetic disk drives. The motor has extremely small dimensions and has to be highly efficient. The magnetic circuit has radial gaps, axial cores, and a pole-anisotropic ring magnet. We found that the core material and the joints of the core and yoke strongly influenced the motor efficiency and the torque constant. We achieved a motor efficiency 5 times greater than the conventional axial gap motor

Published in:

IEEE Transactions on Magnetics  (Volume:32 ,  Issue: 3 )