Electricity: motive power systems – Plural diverse motor controls – Running-speed control
Reexamination Certificate
2008-05-27
2008-05-27
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Plural diverse motor controls
Running-speed control
C318S254100, C318S560000, C318S255000, C318S300000, C318S445000, C388S800000, C388S803000, C388S823000, C388S825000, C388S834000
Reexamination Certificate
active
07378810
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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Richgels Jerry
Sutardja Pantas
Leykin Rita
Marvell International Ltd.
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