A slim spindle motor for blue ray disc player applications

Liu, Chien-Sheng; Tsai, Meng‐Che; Wang, Yung-Hsing; Lin, Kun‐Wei; Chuo, Ying-Chi; Cheng, Lung-Yu; Lee, Jin-Yu; Chang, Yu-Hsiu; Horng, Ji-Bin

doi:10.1016/j.jmmm.2006.01.163

Cited by 3 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In FDB motors, the design of the herringbone groove pattern plays a crucial role in smoothing the pressure distribution within the bearing system and therefore has a direct effect upon the load bearing capacity, service life, shock resistance, and noise characteristics of the motor (Saito et al 2000;Asada et al 2001Asada et al , 2005Liu et al 2006). The literature contains various investigations into the correlation between the load capacity of FDB motors and the groove pattern parameters (e.g., the groove width ratio, the groove length ratio, the groove angle, the groove width, the groove depth, etc.)…”

Section: Design Of Fluid Dynamic Bearingsmentioning

confidence: 99%

A miniature spindle motor with fluid dynamic bearings for portable storage device applications

2009

Self Cite

View full text Add to dashboard Cite

This paper presents the design and fabrication of a miniature axial-gap spindle motor for small-formfactor optical storage applications. The motor features a fluid dynamic bearing (FDB) and is characterized by a high mechanical rigidity, excellent dynamic characteristics, and a zero cogging torque. The performance of this FDB motor is evaluated experimentally using a laboratory-built prototype. The results show that the motor has an excellent dynamic response, a small axial repeatable runout, a small tilt angle, a high rotational speed, and a low operating current. Furthermore, with overall dimensions of just 15.5 9 3.3 mm, the FDB motor is around 80% smaller than that presented by the current group in a previous study (Liu et al., J Magn Magn Mater 304:362-364, 2006). Consequently, the proposed motor represents an ideal solution for both existing and emerging miniaturized portable storage device applications.

show abstract

Section: Design Of Fluid Dynamic Bearingsmentioning

confidence: 99%

A miniature spindle motor with fluid dynamic bearings for portable storage device applications

2009

Self Cite

View full text Add to dashboard Cite

show abstract

“…On the base of this data, the torque constant K t ¼ 55:13 gÁcm/A can be obtained by the finite element method to perform the electromagnetic analysis. 12) The back electromotive force E ¼ 0:565 V of the prototype motor was then measured using a torque meter (Ono Sokki MT-093) when the motor speed was 1000 rpm under the no load condition. The torque constant K t ¼ 55:055 gÁcm/A of the prototype motor can be estimated using the equation E ¼ K t !.…”

Section: Electromagnetic Designmentioning

confidence: 99%

Analysis and Validations of Fluid Dynamic Bearing for Spindle Motors of High-Density Optical Disc Players

Liu

Lin

2008

jjap

Self Cite

View full text Add to dashboard Cite

The cosmological moduli problem has been recently reconsidered. Papers [1,2] show that even heavy moduli (m φ > 10 5 GeV) can be a problem for cosmology if a branching ratio of the modulus into gravitini is large. In this paper, we discuss the tachyonic decay of moduli into the Standard Model's degrees of freedom, e.g. Higgs particles, as a resolution to the moduli-induced gravitino problem. Rough estimates on model dependent parameters set a lower bound on the allowed moduli at around 10 8 ∼ 10 9 GeV.

show abstract

Effects of the Fluid Dynamic Bearing Design on Rotational Precision of a Spindle Motor

et al. 2007

View full text Add to dashboard Cite

A slim spindle motor for blue ray disc player applications

Cited by 3 publications

References 2 publications

A miniature spindle motor with fluid dynamic bearings for portable storage device applications

A miniature spindle motor with fluid dynamic bearings for portable storage device applications

Analysis and Validations of Fluid Dynamic Bearing for Spindle Motors of High-Density Optical Disc Players

Effects of the Fluid Dynamic Bearing Design on Rotational Precision of a Spindle Motor

Contact Info

Product

Resources

About