Abstract
A design strategy of the rotary moving coil actuator is presented for a computer hard disk drive. This paper puts a focus on a coil diameter of the rotary moving coil actuator for the given mechanical properties and magnetic characteristics. To achieve the criteria for the coil diameter, the seek time and power consumption are expressed in terms of the coil conductor diameter. This study shows that the seek time decreases but the power consumption increases as the coil conductor diameter increases. Therefore, the coil design makes a compromise over the seek time and power consumption. An example of the coil diameter design is given to obtain the appropriate coil diameter satisfying the specifications on the seek time and power consumption.
Similar content being viewed by others
References
Ananthanarayanan, K. S., 1982, “Third-order Theory and Bang-bang Control of Voice Coil Actuators,”IEEE Transactions of Magnetics, pp. 888–892.
Autodesk, Inc., 1993,AUTOCAD Release 12: AutoCAD User’s Manual, Sausalito, CA.
Burghes, D. N. and Graham, A., 1980,Introduction to Control Theory Including Optimal Control, Ellis Horwood.
Hiyane, M., et. al., 1972, “Development of Linear Motion Actuator,”Fujitsu Scientific and Technical Journal, pp. 59–82.
Inou, Y., et. al., 1974, “New Linear Motion Actuator for Head Positioning,”Fujitsu Scientific and Technical Journal, pp. 95–118.
Jorgensen, F., 1988,The Complete Handbook of Magnetic Recording (3rd Ed.). TAB Books, Blue Ridge Summit, PA.
Kenjo, T. and Nagamori, S., 1984,Permanent Magnet and Brushless DC Motors, Oxford University Press.
Oswald, R. K., 1980, “The IBM 3370 Headpositioning Control System,”IBM Disk Storage Technology #GA26–1665, pp. 41–48.
Shin-Etsu Chemical Co., Ltd., 1993,Shin-Etsu Rare Earth Magnets, Tokyo, Japan.
Tal, J. and Kahne, S. J., 1973, “Control and Component Selection for Incremental Motion System,”Automatics 9, pp. 501–507.
Tal, J., 1981, “The Optimal Design of Incremental Motion Servo System,”Drives and Controls International, pp. 672–674.
Totoku Electric Co. Ltd, 1993,Magnet Wires, Tokyo, Japan.
Wagner, J. A., 1983, “The Actuator in High Performance Disk Drives: Design Rules for Minimize Access Time,”IEEE Transactions of Magnetics, MAG-19, #5, pp. 1686–1688.
Wagner, J. A., 1991, “The Choice of Steel in a Moving Coil Actuator for Disk Drives,”IEEE Industry Applications Society Annual Meeting, Dearborn Michigan.
Wagner, J. A., 1992, “Access Time Minimization of a Moving Coil Actuator with Volumetric, Magnetic and Current Constraints,”IEEE Industry Applications Society Annual Meeting I, Houston Texas, pp. 148–155.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Chung, J. A design of the VCM coil diameter of a rotary actuator in a computer hard disk drive. KSME Journal 10, 22–30 (1996). https://doi.org/10.1007/BF02953940
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02953940