Method and apparatus for spindle motor control
First Claim
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1. A method comprising:
- receiving timing information associated with a first stator winding and a second stator winding of a spindle motor, the timing information being generated based on a rotational speed of the spindle motor;
determining position information including physical positions of the first and second windings relative to each other;
comparing the received timing information with reference information; and
adjusting the rotational speed of the spindle motor based on the comparison and the position information.
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Abstract
Information indicative of the placement of spindle motor components may be obtained and used to provide a correction to one or more BEMF-derived attributes used to control the spindle speed. In some implementations, first and second signals indicative of BEMF of different stator windings may be used to determine a speed-related characteristic. The speed related characteristic may be used to determine an error amount, which may be used to determine a correction factor to control the speed of the spindle motor.
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Citations
20 Claims
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1. A method comprising:
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receiving timing information associated with a first stator winding and a second stator winding of a spindle motor, the timing information being generated based on a rotational speed of the spindle motor; determining position information including physical positions of the first and second windings relative to each other; comparing the received timing information with reference information; and adjusting the rotational speed of the spindle motor based on the comparison and the position information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A spindle motor controller comprising:
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one or more inputs configured to receive timing information from a spindle motor, the timing information including timing information associated with a first stator winding and a second stator winding of the spindle motor, the timing information being generated based on a rotational speed of the spindle motor; and a module configured to; determine position information including physical positions of the first and second windings relative to each other; compare the received timing information with reference information; and adjust the rotational speed of the spindle motor based on the comparison and the position information. - View Dependent Claims (18, 19, 20)
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Specification