JPS57147161A - Magnetic disc device - Google Patents

Magnetic disc device

Info

Publication number
JPS57147161A
JPS57147161A JP3334381A JP3334381A JPS57147161A JP S57147161 A JPS57147161 A JP S57147161A JP 3334381 A JP3334381 A JP 3334381A JP 3334381 A JP3334381 A JP 3334381A JP S57147161 A JPS57147161 A JP S57147161A
Authority
JP
Japan
Prior art keywords
motor
voltage
temporarily
driving
3sec
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
JP3334381A
Other languages
Japanese (ja)
Inventor
Susumu Mizuno
Isao Kishigami
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3334381A priority Critical patent/JPS57147161A/en
Publication of JPS57147161A publication Critical patent/JPS57147161A/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
    • 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

Landscapes

  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE:To reduce damages given to a head and a disc and to improve the durability, by decreasing the time width for the number of revolutions where the head is not completely floated, through an increased driving voltage temporarily at the start of a DC motor. CONSTITUTION:In a magnetic disc device of a system in contact start and stop of magnetic heads, a DC motor 6 is employed for a spindle and the number of revolutions is controlled with a motor driving power supply with the voltage control. At starting, the power supply voltage is switched with a timer 2 and switches 4 and 5 to obtain a high driving voltage VH temporarily and the driving voltgage is also temporarily switched to a negative voltage, -VL at stopping. For example, by using a circuit as shown in Figure, the motor 6 starts rotation rapidly with a motor ON signal and the speed reaches 5,000rpm after about 3sec and it goes to the base speed, 3,600rpm after about 7sec. At stopping, the motor stops completely in about 3sec.
JP3334381A 1981-03-09 1981-03-09 Magnetic disc device Pending JPS57147161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3334381A JPS57147161A (en) 1981-03-09 1981-03-09 Magnetic disc device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3334381A JPS57147161A (en) 1981-03-09 1981-03-09 Magnetic disc device

Publications (1)

Publication Number Publication Date
JPS57147161A true JPS57147161A (en) 1982-09-10

Family

ID=12383914

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3334381A Pending JPS57147161A (en) 1981-03-09 1981-03-09 Magnetic disc device

Country Status (1)

Country Link
JP (1) JPS57147161A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100383635B1 (en) * 1996-03-06 2003-07-18 삼성전자주식회사 Circuit for braking spindle motor of disk drive

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100383635B1 (en) * 1996-03-06 2003-07-18 삼성전자주식회사 Circuit for braking spindle motor of disk drive

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