JPS649312A - Rotation detector - Google Patents
Rotation detectorInfo
- Publication number
- JPS649312A JPS649312A JP16452087A JP16452087A JPS649312A JP S649312 A JPS649312 A JP S649312A JP 16452087 A JP16452087 A JP 16452087A JP 16452087 A JP16452087 A JP 16452087A JP S649312 A JPS649312 A JP S649312A
- Authority
- JP
- Japan
- Prior art keywords
- pitch
- ring magnet
- magnetization
- magnetic poles
- magnet
- 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
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
PURPOSE:To reduce a magnetizing pitch, by building a rotor using an aluminum- manganese-carbon based alloy magnet. CONSTITUTION:The use of an aluminum-manganese-carbon based alloy magnet for a ring magnet 2 of a rotor eliminates changes in dimensions with respect to humidity or almost does with respect to temperature. The ring magnet 2 is machined to the roundness with a lathe or the like after a shaft 1 is fixed by an adhesive material or by press fitting. Hence, the ring magnet 2 can be arranged close to a magnetic sensor 3, for example, with a gap of 0.05mm therebetween, which permits increase in the number of magnetic poles in magnetization to 1024 with the magnetization pitch P set at 0.077mm. As a result, the arrangement of numerous magnetic poles is made possible with a reduction in the pitch P to produce a rotation detector with high resolutions. On the other hand, when the number of magnetic poles in magnetization is fixed, the pitch P can be reduced thereby enabling miniaturization of the apparatus with a smaller outer diameter of the ring magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16452087A JPS649312A (en) | 1987-07-01 | 1987-07-01 | Rotation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16452087A JPS649312A (en) | 1987-07-01 | 1987-07-01 | Rotation detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS649312A true JPS649312A (en) | 1989-01-12 |
Family
ID=15794725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16452087A Pending JPS649312A (en) | 1987-07-01 | 1987-07-01 | Rotation detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS649312A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010271174A (en) * | 2009-05-21 | 2010-12-02 | Nikon Corp | Encoder |
| JP2012508388A (en) * | 2008-11-11 | 2012-04-05 | ツェットエフ、レンクジステメ、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング | Sensor device for detecting the rotational position of a rotary shaft |
| DE102012104315B4 (en) | 2012-05-18 | 2018-10-31 | Sma Solar Technology Ag | A method of sequentially disconnecting / connecting electrical power sources from / to a common load |
-
1987
- 1987-07-01 JP JP16452087A patent/JPS649312A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012508388A (en) * | 2008-11-11 | 2012-04-05 | ツェットエフ、レンクジステメ、ゲゼルシャフト、ミット、ベシュレンクテル、ハフツング | Sensor device for detecting the rotational position of a rotary shaft |
| JP2010271174A (en) * | 2009-05-21 | 2010-12-02 | Nikon Corp | Encoder |
| DE102012104315B4 (en) | 2012-05-18 | 2018-10-31 | Sma Solar Technology Ag | A method of sequentially disconnecting / connecting electrical power sources from / to a common load |
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