Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control
Reexamination Certificate
2006-06-19
2008-12-16
Ip, Paul (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Brushless motor closed-loop control
C318S254100, C318S268000, C318S276000, C360S073030, C360S075000
Reexamination Certificate
active
07466095
ABSTRACT:
A system and method for controlling an actuator includes a control module that communicates with a plurality of switching devices to generate current through a voice coil motor during a first time period so that an actuator arm rotates in a first rotational direction in response to the current. The control module controls the switching devices to discharge the current from the voice coil motor during a second time period less than the first time period so that the first rotational direction of the actuator arm is maintained after discharging the current. The control module further includes a back electromagnetic force (bemf) module for determining a bemf voltage after controlling the switching devices to discharge the current, and an actuator arm speed control module for determining an actuator arm speed in response to the bemf voltage.
REFERENCES:
patent: 5965992 (1999-10-01), Goretzki et al.
patent: 6664749 (2003-12-01), Heydt et al.
patent: 6697207 (2004-02-01), Harmer
patent: 6700344 (2004-03-01), Krishnamoorthy et al.
patent: 6765746 (2004-07-01), Kusumoto
patent: 7062160 (2006-06-01), Heydt et al.
patent: 2002/0141102 (2002-10-01), Kusumoto
patent: 2002/0196575 (2002-12-01), Harmer
patent: 2004/0036436 (2004-02-01), Tieu
patent: 2004/0245950 (2004-12-01), Ang et al.
patent: 2005/0099148 (2005-05-01), DuLaney
patent: 2005/0117245 (2005-06-01), Park et al.
patent: 2006/0132070 (2006-06-01), Heydt et al.
patent: 2006/0164749 (2006-07-01), Yamamoto
patent: 2007/0081268 (2007-04-01), Jung et al.
patent: 2007/0230027 (2007-10-01), Kawabe
Ip Paul
Marvell International Ltd.
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