JPS6142262A - Brushless motor - Google Patents
Brushless motorInfo
- Publication number
- JPS6142262A JPS6142262A JP16357984A JP16357984A JPS6142262A JP S6142262 A JPS6142262 A JP S6142262A JP 16357984 A JP16357984 A JP 16357984A JP 16357984 A JP16357984 A JP 16357984A JP S6142262 A JPS6142262 A JP S6142262A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- detection member
- brushless motor
- speed detection
- magnet rotor
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/14—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with speed sensing devices
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Brushless Motors (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、磁気記録再生装置等の駆動源に用いられるブ
ラシレスモータに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a brushless motor used as a drive source for magnetic recording/reproducing devices and the like.
従来例の構成とその問題点
近年、磁気記録再生装置においては、駆動用モータとし
てブラシレスモータを用い、定速回転を得るために閉ル
ープの速度制御が盛んに行なわれている。Conventional Structure and Problems In recent years, in magnetic recording and reproducing apparatuses, a brushless motor is used as a drive motor, and closed-loop speed control is frequently performed in order to obtain constant rotation speed.
このような従来のブラシレスモータについて第１図を用
いて説明する。第１図は従来のブラシレスモータの断面
図で、１は主磁界を発生する円筒状の永久磁石回転子、
２は永久磁石回転子１の磁気回路を構成するヨーク、３
は永久磁石回転子１の回転位置を検出するための位置検
出素子、４は永久磁石回転子１の１１極面に対向配置さ
れかつ円筒型に樹脂モールドされた駆動コイルユニット
、５は駆動コイルユニツ１−４を載置する基板、６は永
久磁石回転子１と一体的に回転しかつ端面６ａに複数極
の着磁が施された円環状磁石、７は円環状磁石６の端面
６ａに対向配置されて円環状磁石６の磁束の変化を検出
して速度信号を発生する速度検出部材である。Such a conventional brushless motor will be explained using FIG. 1. Figure 1 is a cross-sectional view of a conventional brushless motor, where 1 is a cylindrical permanent magnet rotor that generates the main magnetic field;
2 is a yoke that constitutes the magnetic circuit of the permanent magnet rotor 1;
4 is a position detection element for detecting the rotational position of the permanent magnet rotor 1; 4 is a drive coil unit disposed opposite to the 11-pole surface of the permanent magnet rotor 1 and molded in a cylindrical resin; 5 is a drive coil unit 1; - A substrate on which 4 is placed, 6 is a circular ring magnet that rotates integrally with the permanent magnet rotor 1 and has a multi-pole magnetization on its end face 6a, and 7 is arranged opposite to the end face 6a of the circular magnet 6. This is a speed detection member that detects changes in the magnetic flux of the annular magnet 6 and generates a speed signal.
まず、位置検出素子３が永久磁石回転子１の磁束を検出
づることにより、永久磁石回転子１の回転位置を知り、
回路処理（図示せず）により所定の相の駆動コイルユニ
ット４に電圧が印加され、駆動コイルユニット４と永久
磁石回転子１との間に回転力が発生ずる。永久磁石回転
子１が回転すると、円環状磁石６も一体的に回転するの
で、円環状磁石６の磁束の変化を検出する速度検出部材
７から速度信号が発生する。この速度信号をもとに、回
路処理〈図示せず）により永久磁石回転子１の回転速度
が制御される。そこで、永久磁石回転子１の回転速度を
一定に保つためには、正確な速度信号を得る必要があり
、正確な速度信号を冑るためには速度検出部材７の位置
決め精度を上げる必要がある。First, the position detection element 3 detects the magnetic flux of the permanent magnet rotor 1 to know the rotational position of the permanent magnet rotor 1.
A voltage is applied to the drive coil unit 4 of a predetermined phase by circuit processing (not shown), and rotational force is generated between the drive coil unit 4 and the permanent magnet rotor 1. When the permanent magnet rotor 1 rotates, the annular magnet 6 also rotates integrally, so that a speed signal is generated from the speed detection member 7 that detects changes in the magnetic flux of the annular magnet 6. Based on this speed signal, the rotational speed of the permanent magnet rotor 1 is controlled by circuit processing (not shown). Therefore, in order to keep the rotational speed of the permanent magnet rotor 1 constant, it is necessary to obtain an accurate speed signal, and in order to obtain an accurate speed signal, it is necessary to increase the positioning accuracy of the speed detection member 7. .
しかしながら上記のような従来の構成では、速度検出部
材７と駆動コイルユニット４との間、及び駆動コイルユ
ニット４と基板５との間でそれぞれ正確な位置決めを行
なう必要があり、その位置決め精度を上げることが非常
に国難であるという問題があった。また、速度検出部材
７を駆動コイルユニット４に固着する手段として、接着
剤を用いるために、作業能率が著しく悪化するという問
題があった。However, in the conventional configuration as described above, it is necessary to perform accurate positioning between the speed detection member 7 and the drive coil unit 4, and between the drive coil unit 4 and the board 5, and it is necessary to improve the positioning accuracy. The problem was that this was a serious national crisis. Further, since an adhesive is used as a means for fixing the speed detection member 7 to the drive coil unit 4, there is a problem in that work efficiency is significantly deteriorated.
発明の目的
本発明は上記従来の欠点を解消するもので、構成を簡略
化でき、作業能率を向上させることができるとともに、
回転精度の向上を実現でさるブラシレスモータを提供す
ることを目的とする。OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks, simplifies the configuration, improves work efficiency, and
The purpose is to provide a brushless motor that achieves improved rotational accuracy.
発明の構成
上記目的を達成するため、本発明のブラシレスモータは
、周方向に複数極の着磁が施された円筒状の永久磁石回
転子と、この永久磁石回転子と同軸状に配置されて一体
的に回転しかつ複数極の着磁が施された円環状磁石と、
この円環状磁石の磁極面に対向して配置されて前記永久
磁石回転子の回転速度を検出するための速度検出部材と
前記永久磁石回転子と同軸状にかつ磁極面に対向して配
置された駆動コイルとを一体的に樹脂モールドした円筒
状の固定子とを備えた構成としたものである。Structure of the Invention In order to achieve the above object, the brushless motor of the present invention includes a cylindrical permanent magnet rotor that is magnetized with multiple poles in the circumferential direction, and a cylindrical permanent magnet rotor that is arranged coaxially with the permanent magnet rotor. An annular magnet that rotates integrally and is magnetized with multiple poles,
a speed detection member disposed facing the magnetic pole face of the annular magnet for detecting the rotational speed of the permanent magnet rotor; and a speed detection member disposed coaxially with the permanent magnet rotor and facing the magnetic pole face. The drive coil is configured to include a cylindrical stator integrally molded with resin.
実施例の説明
以下、本発明の実施例について、図面に基づいて説明す
る。DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on the drawings.
第２図は本発明の第１の実施例におけるブラシレスモー
タの断面図、第３図は同ブラシレスモー 。FIG. 2 is a sectional view of a brushless motor according to a first embodiment of the present invention, and FIG. 3 is a sectional view of the same brushless motor.
りの固定子の斜視図であり、第１図に示す構成要素と同
一の構成要素には同一の符号を付してその説明を省略す
る。第２図及び第３図において、８は速度検出部材で、
この速度検出部材８は、導電性材料を、打ち抜き又はエ
ツチングの手段を用いて、第３図に示すごとくジグザグ
状に形成するか、あるいは細線を金型によりジグザグ状
に成形し、円環状磁石６の端面６ａに対向する位置に配
置したものであり、直線部８ａが速度信号の発生部分で
、内周部８ｂと外周部８ｃとが直線部８ａの連結部分で
ある。９は駆動コイル、１０は速度検出部材８と駆動コ
イル９とを一体的に樹脂モールドした円筒状の固定子で
あり、速度検出部材８と駆動コイル９とは樹脂部１０ａ
によって一体固着されている。FIG. 2 is a perspective view of a second stator, in which the same components as those shown in FIG. In FIGS. 2 and 3, 8 is a speed detection member;
This speed detection member 8 is formed by punching or etching a conductive material into a zigzag shape as shown in FIG. The linear portion 8a is a speed signal generating portion, and the inner circumferential portion 8b and outer circumferential portion 8c are connecting portions of the linear portion 8a. 9 is a drive coil; 10 is a cylindrical stator in which a speed detection member 8 and a drive coil 9 are integrally molded in resin; the speed detection member 8 and drive coil 9 are connected to a resin part 10a;
are fixed together by.
このように構成すれば、速度検出部材８を駆動コイル９
に接着する必要がないので、作業能率を著しく改善する
ことができる。また、速度検出部材８の内周部８ｂある
いは外周部８Ｃのいずれか一方を、樹脂モールド金型（
図示せず）によって直接位置決めすることができるので
、位置精度の優れた固定子１０を容易に得ることができ
る。With this configuration, the speed detection member 8 is connected to the drive coil 9.
Since there is no need to adhere the material to the material, work efficiency can be significantly improved. In addition, either the inner peripheral part 8b or the outer peripheral part 8C of the speed detection member 8 is molded with a resin mold (
(not shown), it is possible to easily obtain the stator 10 with excellent positional accuracy.
第４図は速度検出部材にプリント基板を用いた場合の固
定子の斜視図で、この実施例において、１１は速度検出
部材であり、リング状基板１１ａにジグザグパターン１
１ｂを形成し、８１８所の切欠き１１ｃが設けられてい
る。１２は速度検出部材１１と駆動コイル９とを一体的
に樹脂モールドした筒状の固定子で、１２ａは樹脂部分
である。FIG. 4 is a perspective view of the stator when a printed circuit board is used as the speed detection member. In this embodiment, 11 is a speed detection member, and a zigzag pattern 1 is formed on a ring-shaped board 11a.
1b, and 818 notches 11c are provided. 12 is a cylindrical stator in which the speed detection member 11 and the drive coil 9 are integrally molded with resin, and 12a is a resin portion.
上記構成において、速度検出部材１１の８箇所の切欠き
１１Ｃによって、ジグザグパターン１１ｂの位相を決め
ることができるとともに、速度検出部材１１と樹脂部分
１２ａとの固着力を上げることができる。なお、この切
欠きＩｌｃの代わりに孔を穿設しても同様の効果を得る
ことができる。In the above configuration, the eight notches 11C of the speed detection member 11 can determine the phase of the zigzag pattern 11b, and can increase the adhesion force between the speed detection member 11 and the resin portion 12a. Note that the same effect can be obtained even if a hole is provided instead of the notch Ilc.
発明の効果
以」＝説明したように本発明によれば、速度検出部材と
駆動コイルとを一体的に樹脂モールドしたので、速度検
出部材の位置決め精度を高めるとともに、モータの組立
作業の能率を茗しく改善することができ、その工業的利
用（ｉｉ値は極めて大である。Effects of the Invention = As explained above, according to the present invention, the speed detection member and the drive coil are integrally molded with resin, which improves the positioning accuracy of the speed detection member and improves the efficiency of motor assembly work. and its industrial use (ii value is extremely large).
４、図面’７） ｒｆＡｌ”＝ｘ ｍ 明第１図は従来
のブラシレスモータの断面図、第２図は本発明の一実施
例におけるブラシレスモータの断面図、第３図は同ブラ
シレスモークの固定子の斜視図、第４図は本発明の他の
実施例にお１プるブラシレスモータの固定子の斜視図で
ある。4. Drawing '7) rfAl''=x m Bright Figure 1 is a sectional view of a conventional brushless motor, Figure 2 is a sectional view of a brushless motor according to an embodiment of the present invention, and Figure 3 is a fixation of the same brushless motor. FIG. 4 is a perspective view of a stator of a brushless motor according to another embodiment of the present invention.
１・・・永久磁石回転子、６・・・円環状磁石、８，１
１・・・速度検出部材、１０．１２・・・固定子代即人
森 本 義 弘
第１図
第２図
！Ｉ１３図1... Permanent magnet rotor, 6... Annular magnet, 8, 1
1...Speed detection member, 10.12...Stator cost Yoshihiro Morimoto Figure 1 Figure 2! Figure I13
Claims (1)
回転子と、この永久磁石回転子と同軸状に配置されて一
体的に回転しかつ複数極の着磁が施された円環状磁石と
、この円環状磁石の磁極面に対向して配置されて前記永
久磁石回転子の回転速度を検出するための速度検出部材
と前記永久磁石回転子と同軸状にかつ磁極面に対向して
配置された駆動コイルとを一体的に樹脂モールドした円
筒状の固定子とを備えたブラシレスモータ。 ２、速度検出部材は、導電性材料より成る細幅導体をジ
グザグのリング状に配置した構成とした特許請求の範囲
第１項記載のブラシレスモータ。 ３、速度検出部材は、円環状のプリント基板上に同芯状
にかつ円環状磁石の磁束が鎖交する直線部を有するよう
にジグザグ状のパターンを形成し、前記プリント基板の
前記パターンを形成しない部分に複数個の小孔もしくは
切欠きを設けた構成とした特許請求の範囲第１項記載の
ブラシレスモータ。[Claims] 1. A cylindrical permanent magnet rotor that is magnetized with multiple poles in the circumferential direction, and a rotor that is arranged coaxially with the permanent magnet rotor and rotates integrally with the permanent magnet rotor and has multiple poles. a magnetized annular magnet; a speed detection member disposed opposite to the magnetic pole surface of the annular magnet for detecting the rotational speed of the permanent magnet rotor; and a speed detection member coaxial with the permanent magnet rotor. A brushless motor is equipped with a cylindrical stator integrally molded with a resin and a drive coil disposed facing the magnetic pole surface. 2. The brushless motor according to claim 1, wherein the speed detection member has a configuration in which narrow conductors made of a conductive material are arranged in a zigzag ring shape. 3. The speed detection member forms a zigzag pattern concentrically on the annular printed circuit board and has a straight line portion interlinked with the magnetic flux of the annular magnet, and forms the pattern on the printed circuit board. 2. The brushless motor according to claim 1, wherein a plurality of small holes or notches are provided in the portion where the brushless motor is not provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16357984A JPS6142262A (en) | 1984-08-02 | 1984-08-02 | Brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16357984A JPS6142262A (en) | 1984-08-02 | 1984-08-02 | Brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6142262A true JPS6142262A (en) | 1986-02-28 |
Family
ID=15776588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16357984A Pending JPS6142262A (en) | 1984-08-02 | 1984-08-02 | Brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6142262A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6315168U (en) * | 1986-07-15 | 1988-02-01 | ||
| JPH01206860A (en) * | 1988-02-12 | 1989-08-21 | Tdk Corp | Motor |
| US5493157A (en) * | 1992-09-18 | 1996-02-20 | Victor Company Of Japan, Ltd. | Brushless motor having coreless coil assembly |
-
1984
- 1984-08-02 JP JP16357984A patent/JPS6142262A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6315168U (en) * | 1986-07-15 | 1988-02-01 | ||
| JPH01206860A (en) * | 1988-02-12 | 1989-08-21 | Tdk Corp | Motor |
| US5493157A (en) * | 1992-09-18 | 1996-02-20 | Victor Company Of Japan, Ltd. | Brushless motor having coreless coil assembly |
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