Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Jerry Richgels0
Pantas Sutardja0
Date of Patent
September 20, 2011
0Patent Application Number
124948680
Date Filed
June 30, 2009
0Patent Citations Received
Patent Primary Examiner
Patent 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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