Accurate tracking of coil resistance based on current, voltage and angular velocity
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United States of America Patent
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Jul 25, 2006
Grant Date -
Aug 19, 2004
app pub date -
Feb 19, 2003
filing date -
Feb 19, 2003
priority date (Note) -
In Force
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Abstract
Methods and computer program products for determining accurate estimates of coil resistance are provided. Current differences between pairs of current values are determined. Additionally, voltage differences between pairs of actuator coil voltages (corresponding to the current values) and angular velocity differences between pairs of angular velocities are determined. Coil resistance is estimated based on the current differences, the voltage differences and the angular velocity differences. These coil resistance estimates can be useful for accurately estimating actuator coil, actuator arm and/or head velocity.
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