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US 2011/0235206 A1Published application
Method and apparatus for controlling a motor in a disk drive
AssigneeSamsung Electronics Co., Ltd.
InventorDa-woon Chung
Life of this patent
Estimating the term…
Abstract
A method and apparatus for adaptively controlling a motor considering a state of disturbance applied to a system. The method includes changing a frequency bandwidth of a frequency response characteristic in a motor control system according to a state of disturbance applied to the motor control system, and controlling a speed of the motor by applying the changed frequency bandwidth to the motor control system.
Claims19
A method of controlling a motor, comprising:
- changing a frequency bandwidth of a frequency response characteristic in a motor control system according to a state of a disturbance applied to the motor control system;
- and
- controlling a speed of the motor by applying the changed frequency bandwidth to the motor control system.
An apparatus for controlling a motor, comprising:
- a speed detector for detecting a speed of the motor;
- a plurality of motor controllers, each for generating a speed control signal to reach a target speed based on the detected speed of the motor, according to frequency response characteristics of different frequency bandwidths;
- a selector for selecting one of the plurality of motor controllers based on a disturbance that generates a load variation of the motor;
- and
- a motor driver for generating a driving current based on the speed control signal generated by the motor controller selected by the selector, and applying the generated driving current to the motor.
2 more elements
An apparatus for controlling a motor, comprising:
- a speed detector for detecting a speed of the motor;
- a subtractor for subtracting a speed error corresponding to a difference between the detected speed of the motor and a target speed;
- a speed controller for generating a speed control signal corresponding to the speed error;
- a filter for changing a frequency bandwidth based on a disturbance generating a load variation of the motor, and for filtering and outputting the speed control signal according to a frequency response characteristic of the changed frequency bandwidth;
- and
- a motor driving unit for generating a driving current corresponding to the speed control signal filtered and output by the filter, and for supplying the driving current to the motor.
3 more elements
A disk drive comprising:
- a disk for storing information;
- a spindle motor for rotating the disk;
- a spindle motor controller for changing a frequency bandwidth based on a disturbance condition generating a load variation of the spindle motor, and generating a speed control signal based on a difference between a speed of the spindle motor and a target speed by applying a frequency response characteristic of the changed frequency bandwidth;
- and
- a spindle motor driving unit for generating a driving current corresponding to the speed control signal and applying the generated driving current to the spindle motor.
2 more elements
Dependencies are inferred from the claim text.