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Spindle motor driving method and apparatus

A technology of a spindle motor and a driving method, applied in the directions of mechanical equipment, shafts and bearings, shafts, etc., can solve problems such as increasing the manufacturing cost of hard disk drives

Inactive Publication Date: 2006-04-19
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, increasing the manufacturing cost of the hard disk drive

Method used

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  • Spindle motor driving method and apparatus
  • Spindle motor driving method and apparatus
  • Spindle motor driving method and apparatus

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Embodiment Construction

[0016] The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

[0017] figure 1 is a flowchart of a spindle motor driving method according to an exemplary embodiment of the present invention. refer to figure 1 , in operation 10, the rotational speed of the spindle motor is detected. The rotation speed of the spindle motor is detected by sensing the driving current supplied to the coil for driving the spindle motor.

[0018] Alternatively, the rotational speed of the spindle motor may be detected by sensing counter electromotive force (EMF) generated by the driving current. When driving current is applied to the coil, EMF is generated, and then the spindle motor starts to rotate due to the EMF. The rotation of the permanent magnet mounted on the spindle motor causes back EMF to be generated, and the back EMF acts as an impedance to the driving current. The back EMF is af...

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Abstract

A spindle motor driving method and apparatus are provided. The method includes detecting the rotation speed of a spindle motor and heating a hard disc drive until the spindle motor reaches normal rotation speed. Accordingly, it is possible to enable the spindle motor to quickly reach the normal rotation speed by controlling the heating of the hard disc drive without using temperature and / or viscosity measurement sensors.

Description

technical field [0001] The present invention relates to hard disk drives, and more particularly, to a method and device for driving a spindle motor, which can quickly bring the spindle motor of the hard disk drive to a normal speed by heating the hard disk drive. Background technique [0002] A hard disk drive, which is generally used as an auxiliary storage device for a computer, is a device that records data on a magnetic disk and reproduces data from the magnetic disk by moving a magnetic head on the surface of the magnetic disk while rotating the magnetic disk. [0003] Because fluid dynamic bearing-based spindle motors produce less friction and noise when being driven than ball bearing-based spindle motors, and also have Superior non-repeatable deflection (NRRO, non-repeatable runout) characteristics, so spindle motors based on hydrodynamic bearings are more frequently used than ball bearing-based spindle motors in applications such as hard disk drives that require a la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/00G11B19/20H02K5/16H02K11/25H02P29/00
CPCH02K15/125G11B19/28H02P29/005F16C17/243F16C2370/12H02P29/62
Inventor 孙荣金澈淳郭朱泳
Owner SAMSUNG ELECTRONICS CO LTD