SE438745B - Anordning for undanforande av magnethuvuden i nodsituation - Google Patents
Anordning for undanforande av magnethuvuden i nodsituationInfo
- Publication number
- SE438745B SE438745B SE8302906A SE8302906A SE438745B SE 438745 B SE438745 B SE 438745B SE 8302906 A SE8302906 A SE 8302906A SE 8302906 A SE8302906 A SE 8302906A SE 438745 B SE438745 B SE 438745B
- Authority
- SE
- Sweden
- Prior art keywords
- motor
- spindle
- coil
- circuit
- stator windings
- Prior art date
Links
- 238000004804 winding Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 description 10
- 239000003990 capacitor Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000549194 Euonymus europaeus Species 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B21/00—Head arrangements not specific to the method of recording or reproducing
- G11B21/02—Driving or moving of heads
- G11B21/12—Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position otherwise than during transducing operation
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/40—Protective measures on heads, e.g. against excessive temperature
Landscapes
- Rotational Drive Of Disk (AREA)
- Moving Of Heads (AREA)
- Linear Motors (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/305,941 US4371903A (en) | 1981-09-28 | 1981-09-28 | Emergency head retract system for magnetic disc drives |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8302906L SE8302906L (en) | 1983-05-24 |
SE8302906D0 SE8302906D0 (sv) | 1983-05-24 |
SE438745B true SE438745B (sv) | 1985-04-29 |
Family
ID=23183014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8302906A SE438745B (sv) | 1981-09-28 | 1983-05-24 | Anordning for undanforande av magnethuvuden i nodsituation |
Country Status (10)
Country | Link |
---|---|
US (1) | US4371903A (de) |
EP (1) | EP0089957B1 (de) |
JP (1) | JPS58501790A (de) |
BR (1) | BR8207868A (de) |
CA (1) | CA1172358A (de) |
DE (2) | DE3249032C2 (de) |
GB (1) | GB2123201B (de) |
NL (1) | NL8220134A (de) |
SE (1) | SE438745B (de) |
WO (1) | WO1983001143A1 (de) |
Families Citing this family (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2528213B1 (fr) * | 1982-06-03 | 1987-12-18 | Tandon Corp | Dispositif de memoire a disque magnetique |
US4742410A (en) * | 1983-12-16 | 1988-05-03 | Josephine County Technology, Inc. | Disk drive system with head protection mechanism |
JPS6157359U (de) * | 1984-09-19 | 1986-04-17 | ||
US4647997A (en) * | 1985-04-29 | 1987-03-03 | Plus Development Corporation | Aerodynamic latch for disk file actuator |
US4692829A (en) * | 1985-09-13 | 1987-09-08 | Quantum Corporation | Magnetically biased aerodynamically released integral safety latch for rigid disk drive |
US4679102A (en) * | 1985-11-20 | 1987-07-07 | Seagate Technology | Method and means for parking read/write heads in a disc drive using the back-EMF of the spindle motor to operate a stepper motor |
US4791508A (en) * | 1986-01-21 | 1988-12-13 | Raymond Engineering Inc. | Magnetic disc memory unit |
GB2229852B (en) * | 1986-01-21 | 1991-01-23 | Raymond Engineering | Magnetic disc memory unit |
DE3701635A1 (de) * | 1986-01-21 | 1987-09-10 | Raymond Engineering | Magnetplattenspeicher |
US4658308A (en) * | 1986-03-05 | 1987-04-14 | Miniscribe Corporation | Method and apparatus for retracting head and braking motor of a disc drive device |
JPS62293572A (ja) * | 1986-06-12 | 1987-12-21 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | 記憶装置 |
US4786995A (en) * | 1986-11-06 | 1988-11-22 | Peripheral Technology, Inc | Automatic head retract system for disk drive |
US4866554A (en) * | 1986-11-06 | 1989-09-12 | Peripheral Technology, Inc. | Automatic head retract system for disk drive |
US4870703A (en) * | 1986-12-15 | 1989-09-26 | Raymond Engineering Inc. | Magnetic disc memory unit |
US4831469A (en) * | 1987-07-29 | 1989-05-16 | International Business Machines Corporation | Disk drive head retract and motor braking method and apparatus |
US5003422A (en) * | 1988-07-29 | 1991-03-26 | Microscience International Corp. | Magnetic head locking mechanism |
US5218253A (en) * | 1990-12-19 | 1993-06-08 | Integral Peripherals, Inc. | Spin motor for a hard disk assembly |
US5258695A (en) * | 1990-12-19 | 1993-11-02 | Integral Peripherals, Inc. | Spin motor control system for a hard disk assembly |
WO1992011628A1 (en) * | 1990-12-19 | 1992-07-09 | Integral Peripherals, Inc. | Miniature hard disk drive for portable computer |
KR100295029B1 (ko) * | 1992-11-17 | 2001-10-24 | 요트.게.아. 롤페즈 | 모터구동회로 |
JP3545049B2 (ja) * | 1993-06-22 | 2004-07-21 | エスティーマイクロエレクトロニクス,インコーポレイテッド | 電源エネルギ障害時の逆起電力整流電圧 |
JP2642069B2 (ja) * | 1993-12-28 | 1997-08-20 | インターナショナル・ビジネス・マシーンズ・コーポレイション | アクチュエータのリトラクト方法及び磁気ディスク装置 |
US5675230A (en) * | 1994-03-01 | 1997-10-07 | Seagate Technology, Inc. | Method and apparatus for dynamic low voltage spindle motor operation |
US5737144A (en) * | 1996-06-05 | 1998-04-07 | Quantum Corporation | Switched boost voltage generator for actuator retract in disk drive |
US6094020A (en) * | 1998-11-18 | 2000-07-25 | Western Digital Corporation | Disk drive utilizing Bemf of spindle motor to increase VCM voltage during seeks |
US6639749B1 (en) | 1999-01-21 | 2003-10-28 | Seagate Technology Llc | Supplying power from a spindle motor in a disc drive system |
WO2000051118A1 (en) * | 1999-02-25 | 2000-08-31 | Stmicroelectronics Asia Pacific Pte Ltd | A method and apparatus for controlling a disk drive under a power loss condition |
US6636374B1 (en) * | 1999-04-21 | 2003-10-21 | Seagate Technology Llc | Intelligent speed monitoring auto retract system |
US6188192B1 (en) | 1999-07-30 | 2001-02-13 | Texas Instruments Incorporated | Spindle motor back-EMF synchronous rectifier |
US6476996B1 (en) * | 2000-02-15 | 2002-11-05 | Western Digital Technologies, Inc. | Disk drive comprising an actuator driver circuit for retracting a head independent of a servo microprocessor when a spindle speed fault mode is detected |
JP3937064B2 (ja) * | 2000-04-24 | 2007-06-27 | パイオニア株式会社 | 記録再生装置 |
JP3966534B2 (ja) * | 2000-04-24 | 2007-08-29 | パイオニア株式会社 | 記録再生装置 |
US6859340B2 (en) | 2001-03-09 | 2005-02-22 | Seagate Technology Llc | Method and device for retracting an actuator |
US7005817B2 (en) * | 2001-12-21 | 2006-02-28 | Seagate Technology Llc | Energy conserving disc drive |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB375265A (en) * | 1929-12-21 | 1932-06-23 | Guido Mazza | Electric talking-machine actuated by the combinations of a spring control motor with an electric current dynamo |
GB734926A (en) * | 1951-01-23 | 1955-08-10 | Philips Nv | Improvements in or relating to stand-by electric supply apparatus |
DE1035925B (de) * | 1954-09-29 | 1958-08-07 | Philips Patentverwaltung | Geraet, insbesondere Plattenspieler oder Tonbandgeraet, das durch ein Federwerk in Gang gesetzt wird |
DE1032569B (de) * | 1955-08-04 | 1958-06-19 | Steidinger Geb | Elektrischer Antriebsmotor fuer batteriegespeiste Tonaufnahme- und Wiedergabegeraete mit eingebautem Verstaerker |
DE1102803B (de) * | 1958-10-20 | 1961-03-23 | Siemens Ag | Einrichtung zur magnetischen Speicherung von Fernsehsignalen |
DE1110900B (de) * | 1959-11-10 | 1961-07-13 | Vockenhuber Karl | Schwungmasse fuer die Plattenteller- bzw. die Tonrollenwelle eines Tonaufnahme- und Wiedergabegeraetes |
US3444333A (en) * | 1964-05-08 | 1969-05-13 | Rca Corp | Phonograph with circuit board mounted on the motorboard beneath the turntable |
US3473099A (en) * | 1966-12-28 | 1969-10-14 | Us Navy | Fail passive servo |
US3626264A (en) * | 1969-08-20 | 1971-12-07 | Information Storage Systems | Velocity servosystem |
DE1947574C3 (de) * | 1969-09-19 | 1974-03-14 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Anordnung zur Stromversorgung der Positioniereinrichtung und zur Bremsung des Plattenstapels in einem Plattenspeicher |
US3629679A (en) * | 1970-06-29 | 1971-12-21 | Information Storage Systems | Linear motor power failure detection circuit and fail-safe control |
US4005485A (en) * | 1973-08-31 | 1977-01-25 | Xerox Corporation | Apparatus and method for loading and unloading transducer heads |
US3956766A (en) * | 1974-11-25 | 1976-05-11 | International Business Machines Corporation | Counter resetting circuitry for magnetic disk system |
US4058759A (en) * | 1975-11-19 | 1977-11-15 | Xerox Corporation | Power supply for computer peripheral device |
US4086659A (en) * | 1977-02-28 | 1978-04-25 | Xerox Corporation | Control system for disk drive |
JPS6023420B2 (ja) * | 1978-02-16 | 1985-06-07 | 株式会社日立製作所 | 磁気ヘツドのロ−ド機構 |
US4237501A (en) * | 1978-07-25 | 1980-12-02 | Pertec Computer Corporation | Emergency head unload system for magnetic disk drive |
JPS5651059A (en) * | 1979-10-01 | 1981-05-08 | Mitsubishi Electric Corp | Flexible disc device for both side type |
-
1981
- 1981-09-28 US US06/305,941 patent/US4371903A/en not_active Expired - Lifetime
-
1982
- 1982-04-01 DE DE19823249032 patent/DE3249032C2/de not_active Expired
- 1982-04-01 WO PCT/US1982/000382 patent/WO1983001143A1/en active IP Right Grant
- 1982-04-01 DE DE8282901277T patent/DE3271987D1/de not_active Expired
- 1982-04-01 JP JP57501425A patent/JPS58501790A/ja active Pending
- 1982-04-01 EP EP82901277A patent/EP0089957B1/de not_active Expired
- 1982-04-01 GB GB08312134A patent/GB2123201B/en not_active Expired
- 1982-04-01 BR BR8207868A patent/BR8207868A/pt unknown
- 1982-04-01 NL NL8220134A patent/NL8220134A/nl unknown
- 1982-09-17 CA CA000411659A patent/CA1172358A/en not_active Expired
-
1983
- 1983-05-24 SE SE8302906A patent/SE438745B/sv unknown
Also Published As
Publication number | Publication date |
---|---|
EP0089957A4 (de) | 1983-10-04 |
SE8302906L (en) | 1983-05-24 |
DE3271987D1 (en) | 1986-08-21 |
US4371903A (en) | 1983-02-01 |
DE3249032C2 (de) | 1987-04-02 |
GB8312134D0 (en) | 1983-06-08 |
CA1172358A (en) | 1984-08-07 |
NL8220134A (nl) | 1983-08-01 |
GB2123201A (en) | 1984-01-25 |
BR8207868A (pt) | 1983-08-30 |
JPS58501790A (ja) | 1983-10-20 |
GB2123201B (en) | 1985-07-10 |
DE3249032T1 (de) | 1984-10-04 |
EP0089957A1 (de) | 1983-10-05 |
SE8302906D0 (sv) | 1983-05-24 |
EP0089957B1 (de) | 1986-07-16 |
WO1983001143A1 (en) | 1983-03-31 |
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