FR2627313B1 - DEVICE FOR SUSPENSION AND DRIVE OF COMPUTER MEMORY DISCS - Google Patents

DEVICE FOR SUSPENSION AND DRIVE OF COMPUTER MEMORY DISCS

Info

Publication number
FR2627313B1
FR2627313B1 FR8801716A FR8801716A FR2627313B1 FR 2627313 B1 FR2627313 B1 FR 2627313B1 FR 8801716 A FR8801716 A FR 8801716A FR 8801716 A FR8801716 A FR 8801716A FR 2627313 B1 FR2627313 B1 FR 2627313B1
Authority
FR
France
Prior art keywords
bearings
rotor
fixed
electric motor
suspension
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
FR8801716A
Other languages
French (fr)
Other versions
FR2627313A1 (en
Inventor
Maurice Brunet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe de Mecanique Magnetique SA
Original Assignee
Societe de Mecanique Magnetique SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe de Mecanique Magnetique SA filed Critical Societe de Mecanique Magnetique SA
Priority to FR8801716A priority Critical patent/FR2627313B1/en
Priority to JP3095089A priority patent/JPH0677368B2/en
Publication of FR2627313A1 publication Critical patent/FR2627313A1/en
Application granted granted Critical
Publication of FR2627313B1 publication Critical patent/FR2627313B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0459—Details of the magnetic circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0474—Active magnetic bearings for rotary movement
    • F16C32/0489—Active magnetic bearings for rotary movement with active support of five degrees of freedom, e.g. two radial magnetic bearings combined with an axial bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/044—Active magnetic bearings
    • F16C32/0474—Active magnetic bearings for rotary movement
    • F16C32/0489—Active magnetic bearings for rotary movement with active support of five degrees of freedom, e.g. two radial magnetic bearings combined with an axial bearing
    • F16C32/0491—Active magnetic bearings for rotary movement with active support of five degrees of freedom, e.g. two radial magnetic bearings combined with an axial bearing with electromagnets acting in axial and radial direction, e.g. with conical magnets
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/09—Structural association with bearings with magnetic bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2370/00—Apparatus relating to physics, e.g. instruments
    • F16C2370/12—Hard disk drives or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Rotational Drive Of Disk (AREA)

Abstract

The support and drive mechanism includes a cylindrical rotor (20) constituting a magnetic shield and a mechanical support for multiple hard discs (31) fixed on the external face (25) of the rotor. A fixed central shaft (1) supports the emergency mechanical bearings (14,15) and the stators (61,62,71,72) of two active radial magnetic bearings (60,70) together with the stator (50,51) of an electric motor (50) placed between the two bearings. The rotor (20) has, on its internal face, laminated armatures (53,63,73) forming the rotor armatures of the electric motor and the two magnetic bearings. The bearings are servo-controlled in response to radial and axial position transducers (80,90). ADVANTAGE - Allows increase in density of date which can be stored on fixed hard disc through better position control.
FR8801716A 1988-02-12 1988-02-12 DEVICE FOR SUSPENSION AND DRIVE OF COMPUTER MEMORY DISCS Expired - Fee Related FR2627313B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR8801716A FR2627313B1 (en) 1988-02-12 1988-02-12 DEVICE FOR SUSPENSION AND DRIVE OF COMPUTER MEMORY DISCS
JP3095089A JPH0677368B2 (en) 1988-02-12 1989-02-09 Recording disk support and drive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8801716A FR2627313B1 (en) 1988-02-12 1988-02-12 DEVICE FOR SUSPENSION AND DRIVE OF COMPUTER MEMORY DISCS

Publications (2)

Publication Number Publication Date
FR2627313A1 FR2627313A1 (en) 1989-08-18
FR2627313B1 true FR2627313B1 (en) 1994-08-05

Family

ID=9363235

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8801716A Expired - Fee Related FR2627313B1 (en) 1988-02-12 1988-02-12 DEVICE FOR SUSPENSION AND DRIVE OF COMPUTER MEMORY DISCS

Country Status (2)

Country Link
JP (1) JPH0677368B2 (en)
FR (1) FR2627313B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4998033A (en) * 1989-04-12 1991-03-05 Ebara Corporation Gas dynamic bearing for spindle motor
JPH04103076A (en) * 1990-08-22 1992-04-06 Nec Ibaraki Ltd Spindle motor
DE69125836T2 (en) * 1991-11-14 1997-12-18 Quantum Corp Spindle and hub equipment

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1186527A (en) * 1957-11-18 1959-08-26 Hispano Suiza Sa Improvements made to bearings for rotating bodies, in particular for assemblies which must rotate inside a sealed enclosure
NL108780C (en) * 1959-03-02 1964-07-15
DE2457783C2 (en) * 1974-12-06 1986-10-09 Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh, 6334 Asslar Magnetic storage
JPS5677952A (en) * 1979-11-27 1981-06-26 Matsushita Electric Ind Co Ltd Turntable device
FR2528923A1 (en) * 1982-06-17 1983-12-23 Europ Propulsion MAGNETIC SUSPENSION DEVICE OF A ROTOR PLACED IN A SEALED ENCLOSURE
JPS6026676U (en) * 1983-07-28 1985-02-22 日本精工株式会社 magnetic disk storage device
NL8502058A (en) * 1985-07-17 1987-02-16 Philips Nv ELECTRICAL MACHINE WITH MAGNETIC BEARING FEATURES.
FR2588991A1 (en) * 1985-10-23 1987-04-24 Bull Sa ROTATIONAL DRIVE SYSTEM OF AT LEAST ONE MAGNETIC DISK AND ELECTRIC MOTOR INCLUDED IN SAID SYSTEM

Also Published As

Publication number Publication date
JPH01271965A (en) 1989-10-31
FR2627313A1 (en) 1989-08-18
JPH0677368B2 (en) 1994-09-28

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Legal Events

Date Code Title Description
ST Notification of lapse