JPH0373862A - Rotation detector - Google Patents
Rotation detectorInfo
- Publication number
- JPH0373862A JPH0373862A JP20961089A JP20961089A JPH0373862A JP H0373862 A JPH0373862 A JP H0373862A JP 20961089 A JP20961089 A JP 20961089A JP 20961089 A JP20961089 A JP 20961089A JP H0373862 A JPH0373862 A JP H0373862A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- phase
- parts
- magnetic material
- grooves
- 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
- 239000000696 magnetic material Substances 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 15
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 241001655798 Taku Species 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、回転検出装置、特に９０°位相の異なる２相
（Ａ、 Ｂ相）信号、１回転に１パルス発生するインデ
ックス（Ｚ相〉信号、及び磁極位置検出用３相（Ｕ、
Ｖ、 Ｗ相〉信号の合計６相出力信号を発生せしめる
回転検出装置に関するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a rotation detection device, particularly a rotation detection device that detects two-phase signals (A and B phases) with a 90° phase difference, and an index (Z-phase) signal that generates one pulse per rotation. 3-phase signal and magnetic pole position detection (U,
The present invention relates to a rotation detection device that generates a total of six phase output signals including V and W phase signals.
（従来の技術〉
従来の回転検出装置は、第３図に示すように回転を検出
すべき回転体、例えばブラシレスモータ（図示せず）に
連結したアルミニウム型回転ドラムｌの外周全面に磁性
材料を塗布し、又は回転ドラム１を磁性材料により形成
し、このようにした回転ドラム１の外周に９０″位相の
異なる２相（Ａ。(Prior art) As shown in FIG. 3, a conventional rotation detection device is a rotating body whose rotation is to be detected, such as an aluminum rotating drum l connected to a brushless motor (not shown). The rotary drum 1 is coated with a magnetic material, or the rotary drum 1 is formed of a magnetic material, and two phases (A) having a 90" phase difference are formed on the outer circumference of the rotary drum 1.
Ｂ相）出力信号と、１回転にパルス発生するインデック
ス（Ｚ相〉信号と、及びブラシレスモータの磁極位置検
出用３相（Ｕ、 Ｖ、 Ｗ相）出力信号発生用の磁極
が互いに軸方向に離間して形成されている。The B phase) output signal, the index (Z phase) signal that generates pulses per rotation, and the magnetic poles for generating the 3-phase (U, V, W phase) output signal for detecting the magnetic pole position of the brushless motor are axially aligned with each other. are formed at a distance.
第３図において２はＵ相信号発生のため軸方向にＮＳと
着磁した磁石部分、３はＶ相信号発生のため軸方向にＳ
Ｎと着磁した磁石部分、４はＷ相信号発生のため軸方向
にＮＳと着磁した磁石部分、５は回転ドラム１０）１回
転に１パルスのインデックス信号となるＺ相信号発生の
ため円周方向にＮＳと着磁した磁石部分、６は互いに９
０＠位相の異なるＡ、Ｂ相信号発生のため円周方向に全
周に亘りＮＳ交互に着磁した磁石部分、７は上記回転ド
ラム１の外周面に対向して軸方向に設けたＦｉｔ ｎＱ
磁気抵抗素子、８はリードである。In Figure 3, 2 is a magnet magnetized with NS in the axial direction to generate a U-phase signal, and 3 is a magnet magnetized with S in the axial direction to generate a V-phase signal.
4 is the magnet part magnetized as N in the axial direction to generate the W-phase signal, 5 is the rotating drum 10) circle to generate the Z-phase signal which is an index signal of 1 pulse per rotation. Magnet parts magnetized with NS in the circumferential direction, 6 and 9
0@ Magnet portion NS alternately magnetized all around the circumference in order to generate A and B phase signals with different phases, 7 is a Fit nQ provided in the axial direction facing the outer peripheral surface of the rotating drum 1.
The magnetoresistive element 8 is a lead.
（発明が解決しようとする課題）
然しなからこのような従来の回転検出装置では回転ドラ
ム１の全周上に磁性材料があり、又は全体が磁性材料よ
り戒り、特にＵ、Ｖ、Ｗ相では着磁が各相で１／３づつ
重なるように配置しである為、着磁の端部では磁界のみ
だれが生し、立ち上がり精度が悪いという欠点があった
。(Problem to be Solved by the Invention) However, in such a conventional rotation detection device, there is magnetic material on the entire circumference of the rotating drum 1, or the entire circumference is made of magnetic material, especially in the U, V, and W phases. Since the magnetization is arranged so that each phase overlaps by 1/3, a magnetic field sag occurs at the end of the magnetization, resulting in poor start-up accuracy.
第４図は従来の回転検出装置より得た３相出力信号の波
形図である。FIG. 4 is a waveform diagram of three-phase output signals obtained from a conventional rotation detection device.
本発明は上記の欠点を除くようにしたものである。The present invention seeks to eliminate the above-mentioned drawbacks.
（課題を解決するための手段）
本発明の回転検出装置は回転を測定すべき回転体に連結
した非磁性回転ドラムと、この非磁性回転ドラムの外周
の３相出力信号発生用磁石を設ける部分に形成した溝と
、この溝に埋めた磁性材料とを有し、上記磁性材料を着
磁することを特徴とする。(Means for Solving the Problems) The rotation detection device of the present invention includes a non-magnetic rotating drum connected to a rotating body whose rotation is to be measured, and a portion on the outer periphery of the non-magnetic rotating drum in which a magnet for generating three-phase output signals is provided. It is characterized in that it has a groove formed in the groove and a magnetic material filled in the groove, and the magnetic material is magnetized.
（作 用）
本発明の回転検出装置においては各相の出力信号を発生
するための磁石部分が夫々非磁性部分によって隔離され
、各磁極の端部には磁界のみだれが生しない。(Function) In the rotation detection device of the present invention, the magnet portions for generating output signals of each phase are isolated by non-magnetic portions, so that no magnetic field is generated at the end of each magnetic pole.
（実 施 例） 以下図面によって本発明の詳細な説明する。(Example) The present invention will be explained in detail below with reference to the drawings.
本発明においては第１図に示すようにアルミニウム製の
回転ドラム１の外周に磁性材料を塗布することなく上記
各相用磁石部分となる部分に機械加工又はエツチングに
より溝を設け、この溝に磁性材料を埋め込み、この部分
を着磁して上記各相用磁石部分２〜６を形成せしめる。In the present invention, as shown in FIG. 1, grooves are provided by machining or etching in the portions that will become the magnets for each phase without coating the outer periphery of an aluminum rotating drum 1 with magnetic material. A material is embedded and this portion is magnetized to form the magnet portions 2 to 6 for each phase.
本発明の回転検出装置は上記のような構成であるから特
に３相出力信号では各相での重なり部分、及び端部にお
ける磁界分布は、格段に立ち上がり精度の向上したもの
となり、更に他相への磁気干渉も低減出来るためその出
力波形も第２図に示すように極めて良好となる。Since the rotation detection device of the present invention has the above-described configuration, the magnetic field distribution at the overlapping portions of each phase and at the ends of the three-phase output signal has a markedly improved rise accuracy, and furthermore, the magnetic field distribution at the overlapping portion of each phase and the edge portion is significantly improved. Since magnetic interference can also be reduced, the output waveform becomes extremely good as shown in FIG.
（発明の効果）
上記のように本発明の回転検出装置によれば機械的、電
気的に精度の良い位相関係を有する３相出力信号を得て
精度の良い回転検出をなし得る大きな利益がある。(Effects of the Invention) As described above, the rotation detection device of the present invention has the great advantage of being able to obtain a three-phase output signal having a mechanically and electrically accurate phase relationship, thereby achieving highly accurate rotation detection. .
第１図は本発明の回転検出装置の説明図、第２図はその
出力信号波形図、第３図は従来の回転検出装置の説明図
、第４図はその出力信号の波形図である。
１・・・回転ドラム、２〜６・・・磁石部分、７・・・
ａｌｌ！磁気抵抗素子、８はリード。
拓
／
図
あ
図
カ
図
祐
図
Ｎコ［Ｎ、＝・FIG. 1 is an explanatory diagram of the rotation detection device of the present invention, FIG. 2 is an output signal waveform diagram thereof, FIG. 3 is an explanatory diagram of a conventional rotation detection device, and FIG. 4 is a waveform diagram of its output signal. 1... Rotating drum, 2-6... Magnet part, 7...
All! Magnetoresistive element, 8 is lead. Taku / Figure A Figure Ka Figure Yu Figure Nko [N, =・
Claims (1)
ラムと、この非磁性回転ドラムの外周の３相出力信号発
生用磁石を設ける部分に形成した溝と、この溝に埋めた
磁性材料とを有し、上記磁性材料を着磁することを特徴
とする回転検出装置。(1) A non-magnetic rotating drum connected to the rotating body whose rotation is to be measured, a groove formed on the outer periphery of this non-magnetic rotating drum in the part where the three-phase output signal generation magnet is provided, and a magnetic material buried in this groove. A rotation detection device comprising: magnetizing the magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20961089A JPH0373862A (en) | 1989-08-15 | 1989-08-15 | Rotation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20961089A JPH0373862A (en) | 1989-08-15 | 1989-08-15 | Rotation detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0373862A true JPH0373862A (en) | 1991-03-28 |
Family
ID=16575656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20961089A Pending JPH0373862A (en) | 1989-08-15 | 1989-08-15 | Rotation detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0373862A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6064072B1 (en) * | 2016-07-21 | 2017-01-18 | 和光精機株式会社 | Magnetic encoder drum and absolute encoder provided with the drum |
-
1989
- 1989-08-15 JP JP20961089A patent/JPH0373862A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6064072B1 (en) * | 2016-07-21 | 2017-01-18 | 和光精機株式会社 | Magnetic encoder drum and absolute encoder provided with the drum |
| WO2018016200A1 (en) * | 2016-07-21 | 2018-01-25 | 和光精機株式会社 | Drum for magnetic encoder and absolute encoder provided with said drum |
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