Title :
Low-profile spindle motor for 5-mm-height PCMCIA disk drive
Author :
Kuroba, Y. ; Yamada, T. ; Aruga, K. ; Mizoshita, Y.
Author_Institution :
Fujitsu Labs. Ltd., Atsugi, Japan
fDate :
5/1/1996 12:00:00 AM
Abstract :
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
Keywords :
hard discs; magnetic circuits; magnetic cores; magnetic flux; permanent magnet motors; small electric machines; torque; 5 mm; PCMCIA Type-II magnetic disk drives; axial cores; core joints; core material; extremely small dimensions; low-profile spindle motor; magnetic circuit; magnetic flux paths; motor efficiency; pole-anisotropic ring magnet; radial gaps; torque constant; yoke joints; Coils; Disk drives; Iron; Magnetic circuits; Magnetic cores; Magnetic flux; Magnetic materials; Rotors; Stator cores; Torque;
Journal_Title :
Magnetics, IEEE Transactions on
