JPS61149170U

JPS61149170U -

Info

Publication number: JPS61149170U
Application number: JP3052285U
Authority: JP
Priority date: 1985-03-04
Filing date: 1985-03-04
Publication date: 1986-09-13

Description

[Brief explanation of the drawing]

第１図〜第８図は本考案を適用したデイスク記
録又は再生装置の実施例を示し、第１図はリニア
モータ部の走行方向に沿つた要部断面図、第２図
は第１図の―線断面図、第３図はリニアモー
タ部の全体の斜視図、第４図は走行路と直交した
断面図、第５図は位置（速度）検出部の要部平面
図、第６図は位置（速度）検出部及び漏洩検出部
の斜視図、第７図はリニアモータの位置検出出力
、駆動電流及び推進力の波形図、第８図は駆動回
路図、第９図は別の実施例を示す全体の斜視図で
ある。第１０図は従来のリニアモータの要部を示
す斜視図である。なお図面に用いた符号において、１０……磁石
、１１……リターンヨーク、１２……空隙、１３
……バツクヨーク、１５，１６……駆動コイル、
１７，１８……ホール素子、１９……磁石、２４
……光学ピツクアツプ、２８……位置検出部、３
０……速度検出コイル、３３……漏洩検出部、３
４……磁石、３６……打消コイルである。 1 to 8 show an embodiment of a disk recording or reproducing apparatus to which the present invention is applied. - Line sectional view, Figure 3 is a perspective view of the entire linear motor section, Figure 4 is a sectional view perpendicular to the running path, Figure 5 is a plan view of the main part of the position (speed) detection section, and Figure 6 is a perspective view of the entire linear motor section. A perspective view of the position (speed) detection section and the leakage detection section, FIG. 7 is a waveform diagram of the position detection output of the linear motor, drive current and propulsive force, FIG. 8 is a drive circuit diagram, and FIG. 9 is another embodiment. It is a perspective view of the whole. FIG. 10 is a perspective view showing the main parts of a conventional linear motor. In addition, in the symbols used in the drawings, 10...Magnet, 11...Return yoke, 12...Gap, 13
... Back yoke, 15, 16 ... Drive coil,
17, 18... Hall element, 19... Magnet, 24
...Optical pickup, 28...Position detection section, 3
0...Speed detection coil, 33...Leakage detection section, 3
4... magnet, 36... canceling coil.

Claims

[Claims for Utility Model Registration] A magnet having alternating NS magnetic pole rows along a linear movement direction, a drive coil that moves in an alternating magnetic field formed by this magnet, and detection of the relative position of the magnetic poles and the drive coil. a position detecting means for detecting a moving speed of the drive coil, and a speed detecting means for detecting a moving speed of the drive coil, and the direction of the current flowing through the drive coil is controlled based on the output of the position detecting means to face one of the moving directions. A disk which obtains a linear thrust, corrects the speed by controlling the current flowing through the drive coil based on the output of the speed detection means, and controls the relative position of the disk and the head along the disk radial direction. A recording or reproducing device using a type of recording medium.