Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shuyu Cao0
KeXiu Liu0
KianKeong Ooi0
MingZhong Ding0
Date of Patent
August 18, 2009
0Patent Application Number
119405210
Date Filed
November 15, 2007
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A terminal voltage of an actuator motor is measured while the actuator motor is in a high impedance state. An internal voltage of the actuator motor is measured, and a back-EMF voltage of the actuator motor is estimated in response to the terminal voltage of the actuator motor and the internal voltage of the actuator motor. A drive current supplied to the actuator motor is controlled in response to the estimated back-EMF.
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