Torque Performance Analysis of HDD Spindle Motors Based on Geometrical Interpretation

Author

Feng, Ming ; Qu, Liang

Author_Institution

Sch. of Mech. Eng., Univ. of Sci. & Technol. Beijing, Beijing, China

Volume

47

Issue

7

fYear

2011

fDate

7/1/2011 12:00:00 AM

Firstpage

1906

Lastpage

1910

Abstract

By visualizing the torque as an area enclosed by locus of magnet operating points in B-H plane, several surface mounted permanent magnet (SPM) motors with different pole/slot combinations for hard disk drive (HDD) spindle motors are analyzed to clarify their geometrical characteristics of the maximum torque area. Then, a simple and fast calculation algorithm of predicting the maximum torque is proposed based on the torque geometrical interpretation and its validity is verified through comparison with FEA results. In addition, optimum pole/slot combinations for modern HDD spindle motors are recommended from the view points of reducing vibration resource caused by cogging torque and increasing speed control accuracy.

Keywords

disc drives; finite element analysis; hard discs; permanent magnet motors; vibrations; B-H plane; FEA; HDD spindle motors; SPM motors; geometrical interpretation; hard disk drive spindle motors; speed control accuracy; surface mounted permanent magnet motors; torque performance analysis; vibration resource reduction; Brushless motors; Magnetic circuits; Magnetic recording; Permanent magnet motors; Reluctance motors; Torque; Windings; Hard disk drive; Stieltjes integral; pole/slot combination; spindle motor; torque area;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2131122

Filename

5928987