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US 12,597,440 B2Granted
Magnetic disk device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorMasafumi Iwashiro
Life of this patent
Estimating the term…
Abstract
According to an embodiment, in a magnetic disk device, a current detection circuit detects an amount of a first current that is generated by a drive circuit and drives a motor. In a seek operation, a controller acquires a commanded value based on a deviation amount of the amount of the first current detected by the current detection circuit from the commanded value. Then, the controller inputs the acquired commanded value to the drive circuit.
Claims16
A magnetic disk device comprising:
- a magnetic disk;
- an arm provided with a magnetic head configured to access the magnetic disk;
- a motor configured to move the arm to move the magnetic head in a radial direction of the magnetic disk;
- a drive circuit configured to generate a motor current that drives the motor according to a commanded value of an amount of the motor current, and supply the generated motor current to the motor;
- a current detection circuit configured to detect an amount of the motor current generated by the drive circuit;
- and
- a controller configured to input, in a seek operation, a first value as the commanded value to the drive circuit, acquire a second value based on a deviation amount that is a difference between the first value and a first amount, the first amount being an amount of the motor current that is generated by the drive circuit according to the first value, and detected by the current detection circuit, and input the second value as the commanded value to the drive circuit after inputting the first value to the drive circuit.
4 more elements
Dependencies are inferred from the claim text.