Reduced acoustic noise during spin-up by driving a spindle motor open loop using sinusoidal signals
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United States of America Patent
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Nov 8, 2011
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N/A
app pub date -
Jun 26, 2008
filing date -
Jun 26, 2008
priority date (Note) -
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Abstract
A disk drive is disclosed comprising a disk, a head actuated over the disk, and a spindle motor for rotating the disk, wherein the spindle motor comprises a plurality of windings. During a spin-up operation of the disk, a sinusoidal driving signal is applied to each winding of the spindle motor for a spin-up interval, wherein during at least eighty percent of the spin-up interval the sinusoidal driving signals are applied to the windings of the spindle motor open loop.
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