JPS57103163A - Rotation control system of magnetic disk device - Google Patents

Rotation control system of magnetic disk device

Info

Publication number
JPS57103163A
JPS57103163A JP17801380A JP17801380A JPS57103163A JP S57103163 A JPS57103163 A JP S57103163A JP 17801380 A JP17801380 A JP 17801380A JP 17801380 A JP17801380 A JP 17801380A JP S57103163 A JPS57103163 A JP S57103163A
Authority
JP
Japan
Prior art keywords
motor
control system
magnetic disk
disk device
circuit
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
JP17801380A
Other languages
Japanese (ja)
Inventor
Yasuichi Hashimoto
Toshiaki Hattori
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP17801380A priority Critical patent/JPS57103163A/en
Publication of JPS57103163A publication Critical patent/JPS57103163A/en
Pending legal-status Critical Current

Links

Landscapes

  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE: To obtain a constant turning speed quickly and to prevent a head crush, by supplying a current to a DC motor continuously until the turning speed of the DC motor reaches a prescribed value.
CONSTITUTION: A position detector 22 sends a position detection signal 32 on an FF27 and an AND circuit 24 through the rotation of the rotor of a DC motor 21. Unless an FF28 is set on prescribed conditions, on the other hand, the AND circuit 24 supplies an output signal 34 with a level Low to a driving circuit 25, holding an output signal 35 at a level High. Consequently, a transistor 26 turns on to supply a current to the DC motor 21.
COPYRIGHT: (C)1982,JPO&Japio
JP17801380A 1980-12-18 1980-12-18 Rotation control system of magnetic disk device Pending JPS57103163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17801380A JPS57103163A (en) 1980-12-18 1980-12-18 Rotation control system of magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17801380A JPS57103163A (en) 1980-12-18 1980-12-18 Rotation control system of magnetic disk device

Publications (1)

Publication Number Publication Date
JPS57103163A true JPS57103163A (en) 1982-06-26

Family

ID=16041029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17801380A Pending JPS57103163A (en) 1980-12-18 1980-12-18 Rotation control system of magnetic disk device

Country Status (1)

Country Link
JP (1) JPS57103163A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59218673A (en) * 1983-05-10 1984-12-08 Fujitsu Ltd Motor control system for magnetic disk device
JPS61126465U (en) * 1985-01-24 1986-08-08

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59218673A (en) * 1983-05-10 1984-12-08 Fujitsu Ltd Motor control system for magnetic disk device
JPH0430105B2 (en) * 1983-05-10 1992-05-20
JPS61126465U (en) * 1985-01-24 1986-08-08

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