JPS6462810A - Rotary head device - Google Patents

Rotary head device

Info

Publication number
JPS6462810A
JPS6462810A JP62219181A JP21918187A JPS6462810A JP S6462810 A JPS6462810 A JP S6462810A JP 62219181 A JP62219181 A JP 62219181A JP 21918187 A JP21918187 A JP 21918187A JP S6462810 A JPS6462810 A JP S6462810A
Authority
JP
Japan
Prior art keywords
stator coil
stator
coil
motor
superconductive material
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.)
Pending
Application number
JP62219181A
Other languages
Japanese (ja)
Inventor
Saburo Kazama
Masaharu Ono
Tomohito Yamashita
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62219181A priority Critical patent/JPS6462810A/en
Publication of JPS6462810A publication Critical patent/JPS6462810A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G11B21/04—Automatic feed mechanism producing a progressive transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan, e.g. by lead-screw
    • 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
    • G11B5/52—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 simultaneous movement of head and record carrier, e.g. rotation of head
    • G11B5/53—Disposition or mounting of heads on rotating support

Landscapes

  • Brushless Motors (AREA)

Abstract

PURPOSE:To attain the miniaturization, electric power saving and high performance by forming a stator coil by a superconductive material, by providing a means to detect a back electromotive force to occur in a stator coil as a position signal and providing a supporting means to support a fixed part with a magnetic repulsive force at a motor for rotating and driving directly combined to the rotating body structure to mount a head. CONSTITUTION:The flat stator of a motor is provided between the magnetic pole surface of a stator magnet 5 and a rotation yoke 13, and a stator coil 7 composed of a superconductive material and a floating force generating coil 12 composed of the superconductive material in the same way are laminated. After activation, when the number of rotations arrives at a prescribed value of above, the motor detects the back electromotive force of the stator coil 7, and thus, is switched to a direct current brushless motor driving system to control and feed a coil current to the stator coil 7. By the rotation magnetic field from magnets 5, 18 and 18', a shorting induced current flows and thus, the repulsive force occurs and floats at the magnets 5, 18 and 18'. Consequently, in the steady rotation condition, a rotating part is completely in the non-contact condition for the fixed part both in a thrust direction and in a journal direction and in a low friction supporting condition.
JP62219181A 1987-09-03 1987-09-03 Rotary head device Pending JPS6462810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62219181A JPS6462810A (en) 1987-09-03 1987-09-03 Rotary head device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62219181A JPS6462810A (en) 1987-09-03 1987-09-03 Rotary head device

Publications (1)

Publication Number Publication Date
JPS6462810A true JPS6462810A (en) 1989-03-09

Family

ID=16731468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62219181A Pending JPS6462810A (en) 1987-09-03 1987-09-03 Rotary head device

Country Status (1)

Country Link
JP (1) JPS6462810A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5221036A (en) * 1991-06-11 1993-06-22 Haruo Takase Surgical stapler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5221036A (en) * 1991-06-11 1993-06-22 Haruo Takase Surgical stapler

Similar Documents

Publication Publication Date Title
US5227702A (en) Direct current motor utilizing back electromotive force
EP2214297A1 (en) One directional electrification-type brushless dc motor provided with ac voltage output winding and motor system
US7617779B2 (en) Linear brushless D.C. motor with stationary armature and field and with integratable magnetic suspension
ATE97270T1 (en) MAGNETIC BEARING WITH PERMANENT MAGNETS TO ACCEPT THE RADIAL BEARING FORCES.
KR20080040006A (en) Magnetically levitated transport system
JP3271372B2 (en) Magnetic levitation actuator
CA2278510A1 (en) Electrodynamic magnetic bearing
WO2002061918A3 (en) Line start permanent magnet motor
TW390059B (en) Method and apparatus for storing electric power using a permanent magnet type dynamo
KR880701032A (en) Single-stage, two-phase or four-phase synchronous electric motors
ES2008531A6 (en) Multiphase synchronous-design electric machine energized by permanent magnets.
US5404063A (en) Electromagnetic center core dynamo
JPH09261805A (en) Magnetic levitating actuator
AU2023222855A1 (en) Electric Motor
JPS6462810A (en) Rotary head device
WO1995027326A1 (en) Adjustable airgap motor/generator for flywheel system
EP0533767A1 (en) Direct current motor utilizing back electromotive force.
JPS57160346A (en) Regulator for shaft of rotary electric machine
CN217496546U (en) Solar unmanned aerial vehicle magnetic suspension propulsion system
JPS5678368A (en) Hall motor
JPS648854A (en) Brushless dc motor
JPS5549963A (en) Commutatorless dc motor
JPH0369819A (en) Bearing device for electric motor
JPH0544727A (en) Magnetic bearing device
JPS5529246A (en) Dc motor