Method, medium, and apparatus controlling current gain change of a spindle motor driver
AssigneeSamsung Electronics Co., Ltd.
InventorsKyoung-whan Oh, Cheol-hoon Park, Sang-hoon Chu
Life of this patent
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Abstract
A method, medium, and apparatus for controlling a spindle motor of a disk drive. Particularly provided is a method, medium, and apparatus changing a current gain of a spindle motor driver according to the operating environment of the spindle motor. The method of controlling the spindle motor, using the current gain change of the spindle motor driver, includes monitoring a spindle drive control signal indicating the operating environment of the spindle motor and changing a current gain of the spindle motor driver based on the indicated operating environment.
Claims24
A method of controlling a spindle motor, comprising:
- monitoring a spindle drive control signal indicating an operating environment of the spindle motor;
- and
- controlling a current gain for a spindle motor driver based on the indicated operating environment of the spindle drive control signal.
An apparatus controlling a current gain change of a spindle motor driver, the apparatus comprising:
- a spindle drive controller to generate a spindle drive control signal corresponding to a difference between a spindle motor target speed and a detected spindle motor speed;
- a comparator to compare the spindle drive control signal with first and second critical values and to generate a gain switching control signal corresponding to a result of the comparison;
- and
- a spindle driver to control a current gain of the spindle motor driver according to the gain switching control signal, to amplify a detected spindle current using the changed current gain, and to generate a spindle drive current corresponding to a difference between the spindle drive control signal and the amplified detected spindle current.
A hard disk drive, comprising:
- a read/write transducer to read and/or write data from/to a disk;
- a spindle motor to rotate the disk at a predetermined speed for the reading and/or writing of data;
- and
- spindle motor driver, to control a speed of the spindle motor, comprising a means for controlling a current gain for the spindle motor driver based on a detected operating environment of the hard disk drive.
An apparatus controlling a current gain change of a spindle motor driver, the apparatus comprising:
- a spindle drive controller to generate a spindle drive control signal corresponding to a difference between a spindle motor target speed and a detected spindle motor speed;
- and
- a spindle driver to control a current gain of the spindle motor driver according to a gain switching control signal and to generate a spindle drive current corresponding to a difference between the spindle drive control signal and the detected spindle current.
Dependencies are inferred from the claim text.