JPH0454068U - - Google Patents
Info
- Publication number
- JPH0454068U JPH0454068U JP9606590U JP9606590U JPH0454068U JP H0454068 U JPH0454068 U JP H0454068U JP 9606590 U JP9606590 U JP 9606590U JP 9606590 U JP9606590 U JP 9606590U JP H0454068 U JPH0454068 U JP H0454068U
- Authority
- JP
- Japan
- Prior art keywords
- synchronous motor
- circuit
- drive circuit
- actuator
- recording
- 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
Links
- 230000001360 synchronised effect Effects 0.000 claims description 13
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Rotational Drive Of Disk (AREA)
Description
第１図はこの考案による磁気デイスク装置の一
実施例を示す構成図、第２図はこの考案による磁
気デイスク装置の他の実施例を示す構成図、第３
図は従来の磁気デイスク装置を示す構成図である
。
図において、１は記録円板、２はランデイング
ゾーン、３はデータ記録ゾーン、４は同期モータ
、５は同期モータ駆動回路、６は磁気ヘツド、７
はアクチユエータ、８はアクチユエータ駆動回路
、９は電源回路、１０はダイオード、１１はリレ
ーＫ１の接点、１２はリレーＫ１の操作コイル、
１３はリレーＫ２の接点、１４はリレーＫ２の操
作コイル、１５はリレーＫ３の接点、１６はリレ
ーＫ３の操作コイル、１７はダイオード、１８は
コンデンサである。なお、図中、同一符号は同一
、又は相当部分を示す。
FIG. 1 is a block diagram showing one embodiment of the magnetic disk device according to this invention, FIG. 2 is a block diagram showing another embodiment of the magnetic disk device according to this invention, and FIG.
The figure is a configuration diagram showing a conventional magnetic disk device. In the figure, 1 is a recording disk, 2 is a landing zone, 3 is a data recording zone, 4 is a synchronous motor, 5 is a synchronous motor drive circuit, 6 is a magnetic head, and 7
is the actuator, 8 is the actuator drive circuit, 9 is the power supply circuit, 10 is the diode, 11 is the contact of relay K1 , 12 is the operation coil of relay K1 ,
13 is a contact of relay K2 , 14 is an operating coil of relay K2 , 15 is a contact of relay K3 , 16 is an operating coil of relay K3 , 17 is a diode, and 18 is a capacitor. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
ータを駆動するための同期モータ駆動回路と、上
記記録円板上の指定された位置にデータを記録再
生するための磁気ヘツドと、この磁気ヘツドの位
置決めをするアクチユエータと、このアクチユエ
ータを駆動するアクチユエータ駆動回路とを備え
た磁気デイスク装置において、 この磁気デイスク装置の電源を切つた時に上記
同期モータと上記同期モータ駆動回路とを切り放
す第１のスイツチ回路と、 この第１のスイツチ回路により上記同期モータ
駆動回路から切り放なされた上記同期モータが慣
性により回転を続けその電機子コイルに誘起され
る起電圧を整流する整流回路と、 上記磁気デイスク装置の電源を切つた時に上記
磁気ヘツドを記録再生位置からランデイングゾー
ンに戻すため上記アクチユエータへの入力を上記
アクチユエータ駆動回路出力から上記整流回路出
力に切替える切替回路と、 上記磁気ヘツドが記録再生位置からランデイン
グゾーンに戻つた後、上記同期モータを停止させ
るため、同期モータの三相短絡を行う第２のスイ
ツチ回路と を備えたことを特徴とする磁気デイスク装置。[Claims for Utility Model Registration] A synchronous motor for driving a recording disk, a synchronous motor drive circuit for driving the synchronous motor, and a circuit for recording and reproducing data at a specified position on the recording disk. In a magnetic disk device that includes a magnetic head, an actuator that positions the magnetic head, and an actuator drive circuit that drives the actuator, when the power to the magnetic disk device is turned off, the synchronous motor and the synchronous motor drive circuit a first switch circuit that disconnects the synchronous motor from the synchronous motor drive circuit; and a first switch circuit that causes the synchronous motor that is disconnected from the synchronous motor drive circuit to continue rotating due to inertia and rectify the electromotive voltage induced in its armature coil. a rectifier circuit; a switching circuit that switches the input to the actuator from the actuator drive circuit output to the rectifier circuit output in order to return the magnetic head from the recording/reproducing position to the landing zone when the power to the magnetic disk device is turned off; A magnetic disk device comprising: a second switch circuit for short-circuiting three phases of the synchronous motor in order to stop the synchronous motor after the magnetic head returns from the recording/reproducing position to the landing zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9606590U JPH0454068U (en) | 1990-09-14 | 1990-09-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9606590U JPH0454068U (en) | 1990-09-14 | 1990-09-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0454068U true JPH0454068U (en) | 1992-05-08 |
Family
ID=31835300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9606590U Pending JPH0454068U (en) | 1990-09-14 | 1990-09-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0454068U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07154991A (en) * | 1993-10-05 | 1995-06-16 | At & T Global Inf Solutions Internatl Inc | CMOS disk drive motor control circuit with back electromotive force blocking circuit network |
| JPH07163174A (en) * | 1993-10-05 | 1995-06-23 | At & T Global Inf Solutions Internatl Inc | CMOS disk drive motor control circuit with back electromotive force regulator network |
-
1990
- 1990-09-14 JP JP9606590U patent/JPH0454068U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07154991A (en) * | 1993-10-05 | 1995-06-16 | At & T Global Inf Solutions Internatl Inc | CMOS disk drive motor control circuit with back electromotive force blocking circuit network |
| JPH07163174A (en) * | 1993-10-05 | 1995-06-23 | At & T Global Inf Solutions Internatl Inc | CMOS disk drive motor control circuit with back electromotive force regulator network |
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