Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1995-03-08
1996-12-31
Evans, Jefferson
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9908, 310179, 310261, 384100, G11B 1702, H02K 300, F16C 3206
Patent
active
055900038
ABSTRACT:
A hydrodynamic bearing spindle motor for rotating at least one disc about a central axis in a data storage device comprises a base, a stationary member, a hub, and a stator. A hydrodynamic bearing interconnects the hub with the stationary member such that the hub is rotatable about the central axis. The stator is coaxial with the hub and has at least one stator winding that is distributed about its circumference. The distributed winding attenuates pure tone vibrations which become more noticeable with lower levels of background vibrations in hydrodynamic bearing spindle motors.
REFERENCES:
patent: 3678352 (1972-07-01), Bedford
patent: 4933585 (1990-06-01), Rossi
patent: 4940912 (1990-07-01), Kant et al.
patent: 4965476 (1990-10-01), Lin
patent: 5006745 (1991-04-01), Nishio et al.
patent: 5030864 (1991-07-01), Van Hout et al.
patent: 5112141 (1992-05-01), Asada et al.
patent: 5127744 (1992-07-01), White et al.
patent: 5164622 (1992-11-01), Kordik
patent: 5173651 (1992-12-01), Buckley et al.
patent: 5215385 (1993-06-01), Ide
patent: 5328270 (1994-07-01), Crawford et al.
patent: 5355043 (1994-10-01), Kaneda
patent: 5376850 (1994-12-01), Elsing et al.
patent: 5376851 (1994-12-01), Lipo et al.
patent: 5376852 (1994-12-01), Kawamura et al.
patent: 5423612 (1995-06-01), Zang et al.
patent: 5446610 (1995-08-01), Elsaesser et al.
patent: 5457588 (1995-10-01), Hattori et al.
patent: 5459005 (1995-11-01), Asama et al.
patent: 5500780 (1996-03-01), Boutaghou et al.
patent: 5508571 (1996-04-01), Shafer, Jr.
patent: 5510663 (1996-04-01), Van Loenen
DC Motors Speed Controls Servo Systems, "Brushless DC Motors", Electro-Craft Corporation, Hopkins, MN, Chapter 6, pp. 6-5-6-17 (1972) Oct. 1972.
C. Veinott, Theory and Design of Small Induction Motors, "Air-Gap MMF and Flux Waves Set Up By A Single-Phase Winding", published by McGraw-Hill Company, Inc., New York, Chapter 14, pp. 265-281 (1959).
C. Veinott, Theory and Design of Small Induction Motors, "Air-Gap MMF Waves Set Up By A Stator Winding", published by McGraw-Hill Company, Inc., New York, Chapter 15, pp. 282-290 (1959).
A. E. Fitzgerald, C. Kingsley, Jr. and S. Umans, Fourth Edition--Electric Machinery, "Rotating Machines: Basic Concepts", published by McGraw-Hill Company, Inc., New York, pp. 133-135 (1983).
T. H. Barton, J. C. Dunfield, IEEE Transactions on Power Apparatus and Systems, "Inductances of a Practical Slip-Ring Primitive", IEEE, vol. PAS-85/No. 2, pp. 140-159 (1966) Feb. 1966.
J. C. Dunfield, T. H. Barton, Proceedings of The Institution of Electrical Engineers, "Effect of m.m.f. and permeance harmonics in electrical machines--with special reference to a synchronous machine", The Inst. of Elect. Eng., Savoy Place, London WC2, vol. 114, No. 10, pp. 1443-1450 (1967) Oct. 1967.
S. Prina and C. Taft, "The Design and Analysis of Brushless DC Motors Having Smooth Rotor Back Iron," 1992 Symposium of Incremental Motion Control Systems Society, published by Incremental Motion Control Systems Society, P.O. Box 2772, Station A, Champaign, IL 61825, B. C. Kuo editor, pp. 75-100 (1992).
Dunfield John C.
Heine Gunter K.
Evans Jefferson
Seagate Technology Inc.
LandOfFree
Hydrodynamic spindle motor having distributed windings does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydrodynamic spindle motor having distributed windings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydrodynamic spindle motor having distributed windings will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1146122