Direct detection of coil resistance

Details Direct detection of coil resistance Direct detection of coil resistance

2005-07-12

2005-07-12

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078040

Reexamination Certificate

active

06917486

ABSTRACT:
Methods and computer program products for determining accurate estimates of coil resistance are provided. A voice coil voltage value and a corresponding voice coil current value are determined during a seek operation. Additionally, a velocity of the voice coil is determined based on servo information read from servo wedges of a disk during the seek operation. Coil resistance is estimated based on the voice coil voltage, the voice coil current and the velocity values.

REFERENCES:
patent: 4168457 (1979-09-01), Rose
patent: 4524398 (1985-06-01), Fujiki
patent: 4691152 (1987-09-01), Ell et al.
patent: 4697127 (1987-09-01), Stich et al.
patent: 4755892 (1988-07-01), Carteau et al.
patent: 4864437 (1989-09-01), Couse et al.
patent: 4876491 (1989-10-01), Squires et al.
patent: 4920462 (1990-04-01), Couse et al.
patent: 4933785 (1990-06-01), Morehouse et al.
patent: 4967291 (1990-10-01), Touchton et al.
patent: 5034837 (1991-07-01), Schmitz
patent: 5119250 (1992-06-01), Green et al.
patent: 5223993 (1993-06-01), Squires et al.
patent: 5231549 (1993-07-01), Morehouse et al.
patent: 5296790 (1994-03-01), Fincher
patent: 5363359 (1994-11-01), Lee
patent: 5379171 (1995-01-01), Morehouse et al.
patent: 5404636 (1995-04-01), Stefansky et al.
patent: 5426545 (1995-06-01), Sidman et al.
patent: 5485323 (1996-01-01), Anderson et al.
patent: 5510939 (1996-04-01), Lewis
patent: 5532889 (1996-07-01), Stefansky et al.
patent: 5592349 (1997-01-01), Morehouse et al.
patent: 5615064 (1997-03-01), Blank et al.
patent: 5760992 (1998-06-01), Phan et al.
patent: 5768045 (1998-06-01), Patton, III et al.
patent: 5781363 (1998-07-01), Rowan et al.
patent: 5844743 (1998-12-01), Funches
patent: 5863393 (1999-01-01), Hu
patent: 5917672 (1999-06-01), Phan et al.
patent: 5936788 (1999-08-01), Boutaghou et al.
patent: 5949608 (1999-09-01), Hunter
patent: 5982130 (1999-11-01), Male
patent: 6064539 (2000-05-01), Null et al.
patent: 6097564 (2000-08-01), Hunter
patent: 6115199 (2000-09-01), Bang
patent: 6154340 (2000-11-01), Cameron
patent: 6204629 (2001-03-01), Rote et al.
patent: 6222696 (2001-04-01), Kim
patent: 6243226 (2001-06-01), Jeong
patent: 6344942 (2002-02-01), Yarmchuk
patent: 6363214 (2002-03-01), Merello et al.
patent: 6487033 (2002-11-01), Heydt et al.
patent: 6496319 (2002-12-01), Kusumoto et al.
patent: 6512650 (2003-01-01), Tanner
patent: 6560057 (2003-05-01), Klaassen et al.
patent: 6600618 (2003-07-01), Schlager
patent: 6611118 (2003-08-01), Abe et al.
patent: 6614617 (2003-09-01), Galloway
patent: 6643088 (2003-11-01), Kawachi
patent: 6661598 (2003-12-01), Kusumoto et al.
patent: 6690536 (2004-02-01), Ryan
patent: 6717763 (2004-04-01), Ottesen et al.
patent: 6731450 (2004-05-01), Codilian et al.
patent: 6781787 (2004-08-01), Codilian et al.
patent: 6795268 (2004-09-01), Ryan
patent: 2002/0054451 (2002-05-01), Moon et al.
patent: 2004/0160695 (2004-08-01), Zayas et al.
patent: 2004/0160698 (2004-08-01), Zayas et al.
patent: 1 115 064 (2001-07-01), None
“Delta Voltage Control During Actuator Retract”, IBM Technical Disclosure Bulletin, vol. 35, No. 1B, Jun. 1992, pp: 337-339.
R.E. Eaton et al., “Improved Back Electromagnetic Force Voice Coil Motor Controller”, IBM Technical Disclosure Bulletin, vol. 38, No. 11. Nov. 1995 , pp: 315-316.
U.S. Appl. No. 10/368,743, filed Feb. 19, 2003.
U.S. Appl. No. 10/369,314, filed Feb. 19, 2003.
Morcos, Anthony C., “Voice Coil Actuators for Use in Motion Control Systems,” Motion Magazine, 5 pp. Fall 1998.
“Advanced Servo-Mechanical Design Facilitates Improved Performance and Reliability,” 4 pp., Nov. 1999, http://www.ibm.com/harddrive.
“How a Hard Disk Drive Works, Heads,” Hard Disk Drive Guide, 2 pp., Nov. 6, 2002, http://www.duxcw.com/digest/guides/hd/hd5.htm.
Arkin, Michael, “Understanding Head Positioning Systems in Disk Drives—A Primer for the Dynamics of Servo Control,” DataTech, Edition 3, Section 4, pp. 61-65, ICG Publishing.

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