The aim of this paper was to design a micromagnetic bearing (MMB) motor for small form factor optical drives. A MMB motor was developed with inner and outer magnetic-ring stack structure of high permeability. These rings were arranged on the shaft above the permanent magnet of the rotor and the stator. The magnetic force between the MMB, the permanent magnet, and the stator induced the magnetic coupling effect that generated the demon friction torque loss. However, the loss was controlled well under by the proposed approach, so that the good stable system was achieved. After suppressing the loss caused by the magnetic coupling effect, the shaft can be rotated without any frictional contacts in radial direction, the running current was around , and the maximum speed was around . It shows that the MMB demonstrates the lower friction torque loss in comparison with the conventional microball bearing (MBB). Moreover, the radial vibration of our device is 21% lower than the conventional MBB type. To verify the performance of the provided system, both the computer simulation and the experiment were performed.
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15 April 2006
Research Article|
Magnetism and Magnetic Materials|
April 18 2006
Development of micromagnetic bearing motors with suppressed magnetic coupling effect for small form factor optical drives
Chien-Chang Wang;
Chien-Chang Wang
a)
Department of Materials Science and Engineering,
National Chiao Tung University
, Hsinchu 300, Taiwan
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Y. D. Yao;
Y. D. Yao
Department of Materials Science and Engineering,
National Chiao Tung University
, Hsinchu 300, Taiwan and Institute of Physics
, Academia Sinica, Taipei 115, Taiwan
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Shyh-Jier Wang
Shyh-Jier Wang
Opto-Electronics and Systems Laboratories,
ITRI
, Hsinchu 310, Taiwan
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a)
Electronic mail: jamesccw@itri.org.tw
J. Appl. Phys. 99, 08R302 (2006)
Citation
Chien-Chang Wang, Y. D. Yao, Shyh-Jier Wang; Development of micromagnetic bearing motors with suppressed magnetic coupling effect for small form factor optical drives. J. Appl. Phys. 15 April 2006; 99 (8): 08R302. https://doi.org/10.1063/1.2150387
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