JPH0447615U - - Google Patents
Info
- Publication number
- JPH0447615U JPH0447615U JP9042790U JP9042790U JPH0447615U JP H0447615 U JPH0447615 U JP H0447615U JP 9042790 U JP9042790 U JP 9042790U JP 9042790 U JP9042790 U JP 9042790U JP H0447615 U JPH0447615 U JP H0447615U
- Authority
- JP
- Japan
- Prior art keywords
- position detection
- rotor
- rotational position
- detection mechanism
- 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
- 238000001514 detection method Methods 0.000 claims description 13
- 230000004907 flux Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 3
- 239000000696 magnetic material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Description
第１図および第２図は本考案の一実施例におけ
る回転位置検出機構の概要を表わした半側面図お
よび半平面図、第３図は第１図および第２図に表
わされた実施例に用いられている回転体を表わし
た外観斜視説明図、第４図および第５図は回転に
伴う磁束の変化を表わしたい部分側面図、第６図
ａおよびｂは回転位置検出信号を表わした線図、
第７図は従来の回転位置検出機構の概要を表わし
た半側面図である。
１３……ロータマグネツト、１４……ロータケ
ース、１５……切欠部、１６……検出コイル、１
７……集束板、１８……タグマグネツト。
1 and 2 are a half side view and a half plan view showing an outline of a rotational position detection mechanism according to an embodiment of the present invention, and FIG. 3 is an embodiment shown in FIGS. 1 and 2. Figures 4 and 5 are partial side views showing changes in magnetic flux due to rotation, and Figures 6a and b show rotational position detection signals. line diagram,
FIG. 7 is a half side view showing an outline of a conventional rotational position detection mechanism. 13... Rotor magnet, 14... Rotor case, 15... Notch, 16... Detection coil, 1
7... Focusing plate, 18... Tag magnet.
Claims (1)
周方向に複数の磁極が着磁されたロータマグネツ
トと、このロータマグネツトの外周部を覆うよう
に設けられ、該ロータマグネツトと一体に回転さ
れるロータヨークと、上記ロータヨークの外周面
に対向配置された磁気感応素子と、を備えてなる
回転体の回転位置検出機構において、 上記磁気感応素子と対向するロータヨークの外
周面の一部に、前記ロータマグネツトの磁極を露
出させる切欠部を形成するとともに、 上記磁気感応素子に磁束を集束させる磁性材か
らなる集束部材を、ロータヨークの外周面に対向
するようにして前記固定部材側に設置してなるこ
とを特徴とする回転体の回転位置検出機構。 ２ 請求項の１に記載された回転体の回転位置検
出機構において、 集束部材のロータヨーク側への対向面には、位
置検出用マグネツトが固定されてなり、 この位置検出用マグネツトには、切欠部を通し
て露出されるロータマグネツトの磁極における極
性と同極性の磁極が着磁されていることを特徴と
する回転体の回転位置検出機構。 ３ 請求項の１に記載された回転体の回転位置検
出機構において、 磁気感応素子は、検出コイルからなることを特
徴とする回転体の回転位置検出機構。[Claims for Utility Model Registration] 1. A rotor magnet that is rotatably supported on a fixed member and has a plurality of magnetic poles magnetized in the circumferential direction of rotation, and a rotor magnet that is provided so as to cover the outer periphery of the rotor magnet. , a rotational position detection mechanism for a rotating body comprising a rotor yoke that rotates integrally with the rotor magnet, and a magnetically sensitive element that is disposed opposite to the outer peripheral surface of the rotor yoke, the rotor yoke facing the magnetically sensitive element. A notch is formed in a part of the outer peripheral surface of the rotor yoke to expose the magnetic pole of the rotor magnet, and a focusing member made of a magnetic material that focuses magnetic flux on the magnetically sensitive element is arranged to face the outer peripheral surface of the rotor yoke. A rotational position detection mechanism for a rotating body, characterized in that the rotational position detection mechanism is installed on the fixed member side. 2. In the rotational position detection mechanism for a rotating body according to claim 1, a position detection magnet is fixed to the surface of the focusing member facing the rotor yoke, and the position detection magnet has a notch. A rotational position detection mechanism for a rotating body, characterized in that a magnetic pole of the same polarity as that of a rotor magnet exposed through the rotor magnet is magnetized. 3. The rotational position detection mechanism for a rotating body according to claim 1, wherein the magnetically sensitive element comprises a detection coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9042790U JPH0447615U (en) | 1990-08-29 | 1990-08-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9042790U JPH0447615U (en) | 1990-08-29 | 1990-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0447615U true JPH0447615U (en) | 1992-04-22 |
Family
ID=31825175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9042790U Pending JPH0447615U (en) | 1990-08-29 | 1990-08-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0447615U (en) |
-
1990
- 1990-08-29 JP JP9042790U patent/JPH0447615U/ja active Pending