Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control
Reexamination Certificate
2008-12-04
2009-10-13
Ip, Paul (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Brushless motor closed-loop control
C318S254100, C318S268000, C318S276000, C360S073030, C360S075000
Reexamination Certificate
active
07602131
ABSTRACT:
A system includes a current control module that supplies current to a voice coil motor during a first period to rotate an actuator arm in a first rotational direction, that discharges the current from the voice coil motor after the first period, and that generates a control signal a predetermined period after the current is discharged. A back electromagnetic force (bemf) module generates a bemf signal in response to the control signal. A speed control module determines a speed of the actuator arm based on the bemf signal.
REFERENCES:
patent: 5965992 (1999-10-01), Goretzki et al.
patent: 6232758 (2001-05-01), Konda et al.
patent: 6600618 (2003-07-01), Schlager
patent: 6631045 (2003-10-01), Pedrazzini
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: 7012391 (2006-03-01), DuLaney
patent: 7062160 (2006-06-01), Heydt et al.
patent: 7079350 (2006-07-01), Vertemara et al.
patent: 7106546 (2006-09-01), Galbiati
patent: 7145743 (2006-12-01), Park et al.
patent: 7333286 (2008-02-01), Jung et al.
patent: 7369346 (2008-05-01), Yamamoto
patent: 7432677 (2008-10-01), Heydt et al.
patent: 2002/0071199 (2002-06-01), Kokami et al.
patent: 2002/0141098 (2002-10-01), Schlager
patent: 2002/0196575 (2002-12-01), Harmer
patent: 2004/0036436 (2004-02-01), Tieu
patent: 2004/0245950 (2004-12-01), Ang et al.
patent: 2005/0117245 (2005-06-01), Park et al.
patent: 2005/0157418 (2005-07-01), Galbiati
patent: 2007/0230027 (2007-10-01), Kawabe
USPTO Non-Final Office Action mailed Apr. 2, 2008 for U.S. Appl. No. 11/455,476, filed Jun. 19, 2006.
Amendment filed Jul. 1, 2008 in response to USPTO Non-Final Office Action mailed Apr. 2, 2008 for U.S. Appl. No. 11/455,476, filed Jun. 19, 2006.
Ip Paul
Marvell International Ltd.
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