JPS60141561U - Eddy current tachometer - Google Patents
Eddy current tachometerInfo
- Publication number
- JPS60141561U JPS60141561U JP2747284U JP2747284U JPS60141561U JP S60141561 U JPS60141561 U JP S60141561U JP 2747284 U JP2747284 U JP 2747284U JP 2747284 U JP2747284 U JP 2747284U JP S60141561 U JPS60141561 U JP S60141561U
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- rotation
- eddy current
- induction board
- magnetized
- 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.)
- Granted
Links
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来使用されている渦電流式回転計の構成を示
す図、第２図、第３図は過回転式回転計の動作原理を示
す図、第４図、第５図は従来使用されていた永久磁石の
磁化状態とその形状を示す図、第６図は他の従来の渦電
流式回転計の実施例に用いられる永久磁石の磁化状態と
リードスイッチの動作時不動作時の状態を示す図、第７
図は第６図に示す永久磁石を得る着磁装置を示す図、第
８図は第７図の着磁装置により得られる永久磁石の磁束
分布を示すグラフ、第９図は本考案による回転計に使用
される永久磁石の磁束分布を示すグラフ、及び第１０図
は第９図に示す磁束分布をもった永久磁石を得るための
着磁装置を示す図である。
１・・・・・・箱体、２・・・・・・取り付は孔、３・
・・・・・回転軸、１０・・・・・・永久磁石、１２・
・・・・・誘導盤、１３・・・・・・指針、１８・・・
・・・リードスイッチ。
第５
第４図
−ｔFigure 1 is a diagram showing the configuration of a conventionally used eddy current type tachometer, Figures 2 and 3 are diagrams showing the operating principle of an overspeed type tachometer, and Figures 4 and 5 are conventionally used tachometers. Figure 6 shows the magnetization state of the permanent magnet used in another example of the conventional eddy current type tachometer and the operating and non-operating states of the reed switch. Figure 7 showing
The figure shows a magnetizing device for obtaining the permanent magnet shown in FIG. 6, FIG. 8 is a graph showing the magnetic flux distribution of the permanent magnet obtained by the magnetizing device shown in FIG. 7, and FIG. 9 is a tachometer according to the present invention. FIG. 10 is a graph showing the magnetic flux distribution of a permanent magnet used in FIG. 9, and a diagram showing a magnetizing device for obtaining a permanent magnet having the magnetic flux distribution shown in FIG. 1...Box body, 2...Mounting holes, 3.
... Rotating shaft, 10 ... Permanent magnet, 12.
...Guidance board, 13...Pointer, 18...
···Reed switch. 5 Figure 4-t
Claims (1)
永久磁石と、該永久磁石の近傍にこれと対向して前記回
転軸の軸心の周りに回転自在に配設された誘導盤と、該
誘導盤に取り付けられた指針とを備え、前記永久磁石は
その回転中心を通って互に直交する線上の磁極が互に異
極となるように着磁され、前記永久磁石の回転によりそ
の回転数に比例した回転トルクを前記誘導盤に生じさせ
て前記指針を駆動すると共に、前記永久磁石の作る磁界
により前記箱体内で前記永久磁石の近傍に配設されたリ
ードスイッチをオンオフさせるようになした渦電流式回
転計において、前記永久磁石は、その互に隣接する同極
の磁極間の磁束分布が略零となるように着磁されている
ことを特徴とする渦電流式回転計。a permanent magnet that rotates together with a rotating shaft that is rotatably attached to a box; and an induction board that is rotatably disposed near and opposite the permanent magnet around the axis of the rotating shaft; and a pointer attached to the induction board, the permanent magnet is magnetized so that magnetic poles on mutually orthogonal lines passing through the center of rotation thereof are different from each other, and the rotation of the permanent magnet is caused by the rotation of the permanent magnet. A rotating torque proportional to the number is generated in the induction board to drive the pointer, and a magnetic field generated by the permanent magnet turns on and off a reed switch disposed near the permanent magnet inside the box. An eddy current type tachometer characterized in that the permanent magnet is magnetized so that the magnetic flux distribution between mutually adjacent magnetic poles of the same polarity is approximately zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2747284U JPS60141561U (en) | 1984-02-29 | 1984-02-29 | Eddy current tachometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2747284U JPS60141561U (en) | 1984-02-29 | 1984-02-29 | Eddy current tachometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60141561U true JPS60141561U (en) | 1985-09-19 |
| JPH0323573Y2 JPH0323573Y2 (en) | 1991-05-22 |
Family
ID=30524458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2747284U Granted JPS60141561U (en) | 1984-02-29 | 1984-02-29 | Eddy current tachometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60141561U (en) |
-
1984
- 1984-02-29 JP JP2747284U patent/JPS60141561U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0323573Y2 (en) | 1991-05-22 |
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