JPS6364561A - Brushless motor - Google Patents
Brushless motorInfo
- Publication number
- JPS6364561A JPS6364561A JP20634886A JP20634886A JPS6364561A JP S6364561 A JPS6364561 A JP S6364561A JP 20634886 A JP20634886 A JP 20634886A JP 20634886 A JP20634886 A JP 20634886A JP S6364561 A JPS6364561 A JP S6364561A
- Authority
- JP
- Japan
- Prior art keywords
- resin magnet
- magnet
- main permanent
- back yoke
- permanent resin
- 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
- 229920005989 resin Polymers 0.000 claims abstract description 64
- 239000011347 resin Substances 0.000 claims abstract description 64
- 230000005415 magnetization Effects 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims description 8
- 239000000696 magnetic material Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 8
- 239000004575 stone Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 229910000531 Co alloy Inorganic materials 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 241000981595 Zoysia japonica Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- 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、ビデオテープレコーダやオーディオカセット
テープレコーダ、レコードプレーヤ等の映像・音響機器
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 in video and audio equipment such as video tape recorders, audio cassette tape recorders, and record players.
従来の技術
従来の技術としては、例えば、ナショナル・テクニカル
・レポート第２８巻第３号（１９８２年６月）第１６８
ページに記載されているようなブラシレスモータがある
。以下この従来例について、第６図を参照しながら説明
する。第６図はこの従来例の側断面図である。Conventional technology As a conventional technology, for example, National Technical Report Vol. 28 No. 3 (June 1982) No. 168
There is a brushless motor as described on the page. This conventional example will be explained below with reference to FIG. FIG. 6 is a side sectional view of this conventional example.
第６図において、このブラシレスモータ１は、第１の平
面部２に所定の種数の着磁が施され、第２の平面部３に
は磁性材料製のバックヨーク４が当接して接着等の手段
により固着されている円環状の永久磁石５の前記第１の
平面部２と、前記永久磁石５と一体的に回転する磁性材
料製の円環状または円板状のヨーク６とを対向配置する
ことにより磁気空間を構成し、その対向面間に形成され
た磁気空間内に複数相の固定子巻線７ならびに前記永久
磁石５の回転位＝を検出するための回転位１）★山部８
が配設された電気配線部を有するところの非磁性材料製
の固定子平板９を具備してなる。In FIG. 6, in this brushless motor 1, a first flat part 2 is magnetized with a predetermined number of seeds, and a back yoke 4 made of a magnetic material is in contact with a second flat part 3, so that it can be bonded etc. The first plane portion 2 of the annular permanent magnet 5 fixed by the above means and the annular or disc-shaped yoke 6 made of a magnetic material that rotates integrally with the permanent magnet 5 are arranged to face each other. A magnetic space is formed by forming a magnetic space, and a rotational position for detecting the rotational position of the multi-phase stator winding 7 and the permanent magnet 5 in the magnetic space formed between the opposing surfaces. 8
The stator flat plate 9 is made of a non-magnetic material and has an electric wiring section on which a stator plate 9 is provided.
前記永久磁石５は主としてフェライト、希土類コバルト
合金等の焼結磁石から構成されている。また、前記バッ
クヨーク４には、カシメ、ビス止め。The permanent magnet 5 is mainly composed of a sintered magnet made of ferrite, rare earth cobalt alloy, or the like. The back yoke 4 is also caulked and screwed.
接着等の手段により、アルミニウム、アルミニウム合金
、真鍮等から成る金属材料製の回転子ボス１０が固着さ
れ、その回転子ボス１０には前記永久磁石５と一体的に
回転するモータ軸１１が圧入。A rotor boss 10 made of a metal material such as aluminum, aluminum alloy, or brass is fixed by adhesive or other means, and a motor shaft 11 that rotates integrally with the permanent magnet 5 is press-fitted into the rotor boss 10.
接着、ビス止め等の手段により固着されている。It is fixed by adhesive, screws, etc.
前記モータ軸１１はモータ基板１２に取り付けられた軸
受部材１３の軸受ａ１３ａならびに軸受ｂ１３ｂに嵌合
し、回転自在に軸承され、またスラスト受は材１４に当
接してスラスト支持される。The motor shaft 11 is fitted into a bearing a 13a and a bearing b 13b of a bearing member 13 attached to a motor board 12, and is rotatably supported, and the thrust bearing abuts against a member 14 to be thrust supported.
バックヨーク４の外周部に取り付けられた円環状の樹脂
磁石５０は周面部に複数の着磁が施され、前記樹脂磁石
５０の近傍に設けられた回転周波数検出手段５１は、前
記樹脂磁石５０周面部の着磁を検出することにより前記
主永久磁石５の回転周波数を検出する。An annular resin magnet 50 attached to the outer periphery of the back yoke 4 has a plurality of magnetizations applied to its circumferential surface, and a rotational frequency detecting means 51 provided near the resin magnet 50 rotates around the resin magnet 50 times. The rotation frequency of the main permanent magnet 5 is detected by detecting the magnetization of the surface portion.
発明が解決しようとする問題点
しかしながら、前記のように構成された従来のブラシレ
スモータ１の永久磁石５は、フェライト。Problems to be Solved by the Invention However, the permanent magnets 5 of the conventional brushless motor 1 configured as described above are made of ferrite.
希土類コバルト合金等から成る焼結磁石であるため、焼
結した直後においては第１の平面部２ならびに第２の平
面部３の面の反りが太き（、前記永久磁石５の面の反り
を無くすために、前記永久ｃｆ１石５を研削加工した後
にモータに組み込まなければならないという欠点があっ
た。また前記永久磁石５をバックヨーク４に固着保持す
るために、接着工程が必要であり、ブラシレスモータの
コストダウンを妨げていた。Since it is a sintered magnet made of a rare earth cobalt alloy or the like, immediately after sintering, the surfaces of the first plane part 2 and the second plane part 3 have a large warpage (the warpage of the surface of the permanent magnet 5 is large). In order to eliminate this problem, the permanent CF 1 stone 5 must be ground and then assembled into the motor.Also, an adhesion process is required to securely hold the permanent magnet 5 on the back yoke 4. This hindered motor cost reduction.
また樹脂磁石５０がバックヨーク４の外周部に圧入もし
くは接着等の手段により取り付けられているため、モー
タが衝撃を受けた場合には前記樹脂磁石５０が前記バッ
クヨーク４から抜は落ちるという欠点があった。また前
記樹脂４ｆｆ石５０の温度膨張係数が磁性材料製の前記
バックヨーク４よりも大きいので、温度変化を受けた場
合も容易に抜は落ちたり、もしくは割れたりするという
欠点があった。Furthermore, since the resin magnet 50 is attached to the outer circumference of the back yoke 4 by means such as press-fitting or adhesive, there is a drawback that the resin magnet 50 may fall out of the back yoke 4 when the motor receives an impact. there were. Further, since the coefficient of thermal expansion of the resin 4ff stone 50 is larger than that of the back yoke 4 made of a magnetic material, there is a drawback that it easily falls off or cracks even when subjected to temperature changes.
本発明は前記問題点に鑑みてなされたものであり、安価
なブラシレスモータを提供するものである。The present invention has been made in view of the above problems and provides an inexpensive brushless motor.
問題点を解決するための手段
前記問題点を解決するために本発明のブラシレスモータ
は、第１の平面部に所定の極数の着磁が施され、かつ外
周面に複数の着磁が施された円環状または円板状の主永
久樹脂磁石と、その主永久樹脂磁石の第２の平面部側に
配された磁性材料製のバックヨークとを含めてなる回転
子と、前記主永久樹脂磁石の第１の平面部に対向して固
定子巻線が固定子板上に施された固定子と、前記主永久
樹脂磁石の外周面近傍に設けられ、前記主永久樹脂磁石
外周面に施された着磁を検出することにより前記回転子
の回転周波数を検出する回転周波数検出手段とを具備し
、かつ前記バックヨークを一体的に保持するように、前
記主永久樹脂磁石を成型により形成した構成とするもの
である。Means for Solving the Problems In order to solve the above-mentioned problems, the brushless motor of the present invention has a first plane portion magnetized with a predetermined number of poles, and an outer peripheral surface with a plurality of magnetizations. a rotor comprising an annular or disc-shaped main permanent resin magnet and a back yoke made of a magnetic material arranged on the second flat side of the main permanent resin magnet; a stator in which a stator winding is provided on a stator plate facing a first plane portion of the magnet; the main permanent resin magnet is formed by molding so as to integrally hold the back yoke; The structure is as follows.
作用
本発明は、前記した構成により、永久ｃ６石の研削加工
、接着工程を無くすことができ、かつ回転子の回転周波
数検出用の樹脂磁石をも無くすことができ、安価なブラ
シレスモータを実現することができる。Effect: The present invention achieves an inexpensive brushless motor by eliminating the grinding process and bonding process of the permanent C6 stone and also eliminating the need for a resin magnet for detecting the rotational frequency of the rotor. be able to.
実施例
以下、本発明の）実施例について、第１！２１〜第５図
の図面を参照しながら説明する。なお、こ、？Ｌらの図
において第６図で説明したものと同しものについては同
一の符号を付している。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings 1!21 to 5. Furthermore, h-? In the drawings of L et al., the same components as those explained in FIG. 6 are given the same reference numerals.
第１図は本発明の第１の実施例を示す側断面図である０
図において、この第１の実施例のブラシレスモータ１５
は、第１の平面部１６に複数の所定の極数の着付が施さ
れ、かつ外周面４１に複数の着磁が施された円環状また
は円板状の主永久樹脂磁石１８と、前記主永久樹脂磁石
１８の第２の平面部１７に当接し、前記主永久樹脂磁石
１８と一体的に回転する（ｎ性材料製のバックヨーク１
９と、モータ軸１１を固着保持し、前記バックヨーク１
９に固着された回転子ボス２０を含めてなる回転子２１
と、前記主永久樹脂磁石１８の第１の平面部１６と所定
の隙間を有して対向し、電気配線部を有するところの固
定子板２２ならびに、その固定子板２２上に施された複
数相の固定子巻線７及び前記回転子２１の回転位置を検
出するための回転位置検出部８を含めてなる固定子２３
を具備して成る。前記樹脂磁石１８は、溶融した、例え
ばポリアミド等から成る熱可塑性の樹脂材料に、フェラ
イト、または希土類コバルト合金等の永久磁石材料の粉
末を混入し、混練することにより樹脂材料と永久磁石材
料から成る複合材料とし、この複合材料を用いて例えば
射出成型等の成型法により成型して形成される。前記バ
ックヨーク１９は、あらかじめ前記主永久樹脂磁石１８
の成型金型（図示せず）等に入れられ、インサート成型
等の成型手法により前記主永久樹脂磁石１８で一体的に
形成され、前記主永久樹脂磁石１８に挟着保持される。FIG. 1 is a side sectional view showing a first embodiment of the present invention.
In the figure, a brushless motor 15 of this first embodiment is shown.
The main permanent resin magnet 18 is an annular or disk-shaped main permanent resin magnet 18 having a plurality of predetermined number of poles attached to the first plane portion 16 and a plurality of magnetizations applied to the outer circumferential surface 41; The back yoke 1 made of n-type material abuts on the second flat part 17 of the permanent resin magnet 18 and rotates integrally with the main permanent resin magnet 18.
9 and the motor shaft 11 are firmly held, and the back yoke 1
A rotor 21 including a rotor boss 20 fixed to a rotor 9
and a stator plate 22 which faces the first plane part 16 of the main permanent resin magnet 18 with a predetermined gap and has an electrical wiring part, and a plurality of stator plates provided on the stator plate 22. A stator 23 including a phase stator winding 7 and a rotational position detection section 8 for detecting the rotational position of the rotor 21.
It is equipped with the following. The resin magnet 18 is made of a resin material and a permanent magnet material by mixing powder of a permanent magnet material such as ferrite or rare earth cobalt alloy into a molten thermoplastic resin material such as polyamide, and kneading the mixture. It is made of a composite material, and is formed by molding the composite material using a molding method such as injection molding. The back yoke 19 is attached to the main permanent resin magnet 18 in advance.
The main permanent resin magnet 18 is put into a mold (not shown) or the like, integrally formed with the main permanent resin magnet 18 by a molding method such as insert molding, and held by the main permanent resin magnet 18.
前記主永久樹脂磁石１８は第１図に示すように、前記主
永久樹脂磁石１８の外周部側の一部に設けられた断面が
略々２字形状であるような凹部１８ａ内に、前記バック
ヨーク１９の端面部１９ａならびに、端面部１９ｂを挟
着し、前記バックヨーク１９を保持するように構成され
ている。回転子２１と一体的に回転するモータ軸１１は
、前記回転子ポス２０に固着保持され、モーフ基板１２
に取り付けられた軸受部材１３の軸受ａ１３ａならびに
、軸受ｂ１３ｂに嵌合し、回転自在に軸承され、前記固
定子板２２上に設けたスラスト部材（図示せず）により
スラスト支持される。As shown in FIG. 1, the main permanent resin magnet 18 is inserted into a recess 18a formed in a part of the outer circumferential side of the main permanent resin magnet 18 and having an approximately double-shaped cross section. The back yoke 19 is held by sandwiching the end surface portions 19a and 19b of the yoke 19. The motor shaft 11, which rotates integrally with the rotor 21, is fixedly held on the rotor post 20, and is attached to the morph board 12.
The stator plate 22 is fitted into the bearing a 13a and the bearing b 13b of the bearing member 13 attached to the stator plate 22, is rotatably supported, and is thrust supported by a thrust member (not shown) provided on the stator plate 22.
主永久樹脂磁石１８の外周面近傍には回転周波数検出手
段４０が設けられ、前記主永久樹脂磁石１８の外周面４
１に施された着磁を検出することにより回転子２１の回
転周波数を検出する。A rotational frequency detecting means 40 is provided near the outer peripheral surface of the main permanent resin magnet 18.
The rotational frequency of the rotor 21 is detected by detecting the magnetization applied to the rotor 1.
以上のように本実施例のブラシレスモータ１５は、従来
例の焼結磁石の代わりに、樹脂材料と永久磁石材料の複
合材料から成る樹脂磁石が使用されており、またバック
ヨーク１９はインサート成型等により形成された主永久
樹脂磁石１８の凹部１８ａ内に、前記バックヨーク１９
の端面部１９ａと端面部１９ｂとが挟着保持されている
ので、前記主永久樹脂磁石１８を前記バックヨーク１９
に組み込む際、接着は全（不要となり、ブラシレスモー
タのコストダウンを容易に実現することができる。また
主永久樹脂磁石１８の第１の平面部１６のみならず外周
面４１に複数の着磁を施し、この着磁を検出することに
より、回転子２１の回転周波数を検出する構成としてい
るので、従来例の樹脂磁石５０は不要となり、ブラシレ
スモータのコストダウンを容易に実現することができる
。As described above, the brushless motor 15 of this embodiment uses a resin magnet made of a composite material of a resin material and a permanent magnet material instead of the sintered magnet of the conventional example, and the back yoke 19 is formed by insert molding or the like. The back yoke 19 is placed in the recess 18a of the main permanent resin magnet 18 formed by the
Since the end face portions 19a and 19b of the main permanent resin magnet 18 are sandwiched and held, the main permanent resin magnet 18 is
When incorporating the magnet into a brushless motor, adhesive is no longer required, making it easy to reduce the cost of the brushless motor.In addition, multiple magnetizations can be applied not only to the first flat part 16 of the main permanent resin magnet 18 but also to the outer circumferential surface 41. Since the configuration is such that the rotational frequency of the rotor 21 is detected by detecting this magnetization, the resin magnet 50 of the conventional example is not required, and the cost of the brushless motor can be easily reduced.
以下本発明の第２の実施例について、第２図を参照しな
がら説明する。第２図は本発明の第２の実施例を示す側
断面図である。第１図の構成と異なるのは、バックヨー
ク２５に一箇所以上の穴部２５ａを設け、図示のように
主永久樹脂磁石２６の、断面が略々２字形状であるよう
な凹部２６ａにて前記バックヨーク２５の穴部２５８周
辺部を挟着保持した点である。上記のように主永久樹脂
磁石２６がバックヨーク２５の外周部を挟着保持してい
ないので、前記主永久樹脂磁石２６はバックヨーク２５
の外径よりも半径方向に突出することはなく、したがっ
て主永久樹脂磁石２６の外径を小さくすることができ、
ブラシレスモータの小型化を図ることができる。A second embodiment of the present invention will be described below with reference to FIG. FIG. 2 is a side sectional view showing a second embodiment of the invention. What is different from the configuration shown in FIG. 1 is that the back yoke 25 is provided with one or more holes 25a, and the main permanent resin magnet 26 is provided with a recess 26a whose cross section is approximately double-shaped as shown in the figure. This is because the periphery of the hole 258 of the back yoke 25 is clamped and held. As described above, since the main permanent resin magnet 26 does not sandwich and hold the outer circumference of the back yoke 25, the main permanent resin magnet 26
does not protrude in the radial direction beyond the outer diameter of the main permanent resin magnet 26, so the outer diameter of the main permanent resin magnet 26 can be made smaller;
It is possible to downsize the brushless motor.
以下本発明の第３の実施例について、第３図を参照しな
がら説明する。第３図は本発明の第３の実施例を示す側
断面図である。第１図の構成と異なっているのは、第１
図における回転子ボス２０を排除し、主永久樹脂磁石２
９の中心部にモータ軸１１を固着保持するボス部２９ａ
を設けている点である。また主永久樹脂磁石２９の外周
部側の一部ならびに内周部側の一部に設けられた、断面
が略々２字形状であるような凹部２９ｂ、２９ｃ内に、
バックヨーク２８の外周部２８ａと内周部２８ｂが決着
保持されている。上記のように構成した主永久樹脂磁石
２９のボス部２９ａは、直接モータ軸１１を固着保持し
ているので、第１図に示す回転子ポス２０は不要となり
、モータの部品点数を低減することが可能となり、モー
タのコストダウンを容易に実現できる。A third embodiment of the present invention will be described below with reference to FIG. FIG. 3 is a side sectional view showing a third embodiment of the present invention. The difference from the configuration in Figure 1 is that
The rotor boss 20 in the figure is removed, and the main permanent resin magnet 2 is
A boss portion 29a that securely holds the motor shaft 11 at the center of the
The point is that it has been established. Further, in the recesses 29b and 29c, which are provided in a part of the outer circumferential side and a part of the inner circumferential side of the main permanent resin magnet 29, and whose cross section is approximately 2-shaped,
The outer peripheral part 28a and the inner peripheral part 28b of the back yoke 28 are fixed and held. Since the boss portion 29a of the main permanent resin magnet 29 configured as described above directly securely holds the motor shaft 11, the rotor post 20 shown in FIG. 1 is unnecessary, and the number of parts of the motor can be reduced. This makes it possible to easily reduce the cost of motors.
以下本発明の第４の実施例について、第４図を参照しな
がら説明する。第４図は本発明の第４の実晦例を示す側
断面図である。第１図の構成と異なるのは、第１図にお
ける金属材料製の回転子ボス１０を、インサート成型に
より成型した主永久樹脂磁石３０に、バックヨーク２８
とともに決着保持されるように構成し、第４図に示すよ
うな回転子ボス３１とした点である。前記金属材料製の
回転子ボス３１は、前記主永久樹脂磁石３ｏの内周部の
一部に設けられた断面が略々３字形状であるような凹部
３０ａ内に包み込まれるようにして固着保持され、モー
タ軸１１は前記回転子ボス３１の中心部に設けた穴部３
１ａに圧入等の手段により固着保持される。上記のよう
に構成したモータ軸１１を圧入等により固着保持する回
転子ボス３１が金属材料製であるため、前記モータ軸１
１の前記回転子ボス３１からの抜き強度を大きくするこ
とができ、モータが振動、！ｉ撃を受けた場合、前記回
転子ボス３１から前記モータ軸１１の抜けを防止するこ
とができる。A fourth embodiment of the present invention will be described below with reference to FIG. FIG. 4 is a side sectional view showing a fourth embodiment of the present invention. What is different from the configuration shown in FIG. 1 is that the rotor boss 10 made of metal material in FIG.
The rotor boss 31 shown in FIG. The rotor boss 31 made of a metal material is fixedly held by being wrapped in a recess 30a, which is provided in a part of the inner circumference of the main permanent resin magnet 3o and whose cross section is approximately 3-shaped. The motor shaft 11 is inserted into the hole 3 provided in the center of the rotor boss 31.
It is fixedly held in 1a by means such as press fitting. Since the rotor boss 31 that securely holds the motor shaft 11 configured as described above by press-fitting or the like is made of a metal material, the motor shaft 1
It is possible to increase the strength with which the rotor is pulled out from the rotor boss 31, and the motor vibrates! In the event of an i-impact, the motor shaft 11 can be prevented from coming off from the rotor boss 31.
以下本発明の第５の実施例について、第５図を参照しな
がら説明する。第５図は本発明の第５の実施例を示す側
断面図である。第１図の構成と異なるのは、主永久樹脂
磁石３２の第２の平面部３３側に配設したバックヨーク
３４の外周部に、全周にわたって折り曲げ部３５を設け
た点である。A fifth embodiment of the present invention will be described below with reference to FIG. FIG. 5 is a side sectional view showing a fifth embodiment of the present invention. The difference from the configuration shown in FIG. 1 is that a bent portion 35 is provided along the entire circumference of the back yoke 34 disposed on the second plane portion 33 side of the main permanent resin magnet 32.
上記のように構成されたバックヨーク３４は、前記玉永
久樹脂（ｎ石の第１の平面部３６から発生する漏、ｌ！
Ｉ！磁束が前記バックヨーク３４の折り曲げ部３５に集
束し、この折り曲げ部３５とともに（ｎ気回路を構成す
るので、前記漏Ｉ！Ｉ！磁束の回転周波数検出手段４０
への影響を遮蔽することができる。The back yoke 34 configured as described above has leakage generated from the first flat surface portion 36 of the permanent resin (n stone).
I! The magnetic flux converges on the bent portion 35 of the back yoke 34, and together with this bent portion 35 constitutes an n-circuit, the leakage I!I! magnetic flux rotational frequency detection means 40
It is possible to shield the influence on
発明の効果
以上のように本発明のブラシレスモータは、第１の平面
部に所定の極数の着磁が施され、かつ外周面に複数の着
磁が施された円環状または円板状の主永久樹脂磁石と、
その主永久樹脂磁石の第２の平面部側に配された磁性材
料製のバックヨークとを含めてなる回転子と、前記主永
久樹脂【６石の第１の平面部に対向して固定子巻線が固
定子板上に施された固定子と、前記主永久樹脂磁石の外
周面近傍に設けられ、前記主永久樹脂磁石外周面に施さ
れた着磁を検出することにより前記回転子の回転周波数
を検出する回転周波数検出手段とを具備し、かつ前記バ
ックヨークを一体的に保持するように、前記主永久樹脂
磁石を成型により形成したことにより、ブラシレスモー
タに用いる永久磁石の研削加工工程ならびに、バックヨ
ークへの接着工程を省くことができるので、ブラシレス
モータのコストダウンを容易に実現することができる。Effects of the Invention As described above, the brushless motor of the present invention has an annular or disk-shaped brushless motor in which the first plane part is magnetized with a predetermined number of poles, and the outer peripheral surface is magnetized with a plurality of poles. Main permanent resin magnet,
A rotor including a back yoke made of a magnetic material arranged on the second plane side of the main permanent resin magnet, and a stator facing the first plane part of the main permanent resin magnet. The windings are provided near the outer circumferential surface of the stator and the main permanent resin magnet, and the rotor is provided with windings on the stator plate by detecting the magnetization applied to the outer circumferential surface of the main permanent resin magnet. The main permanent resin magnet is formed by molding so as to include a rotational frequency detection means for detecting a rotational frequency and to integrally hold the back yoke. In addition, since the step of bonding to the back yoke can be omitted, cost reduction of the brushless motor can be easily achieved.
また、回転周波数検出用の樹脂磁石を主永久樹脂磁石と
兼用することができるので、モータの部品点数が低減し
、安価なブラシレスモータを実現できるという優れた効
果も得ることができる。また、ブラシレスモータが外部
から衝撃を受けても、あるいは著しい温度変化を受けて
も、主永久樹脂磁石は凹凸の嵌まり合いによってバック
ヨークから不要に離脱することは無い。Further, since the resin magnet for detecting the rotational frequency can also be used as the main permanent resin magnet, the number of parts of the motor can be reduced and an inexpensive brushless motor can be realized, which is an excellent effect. Further, even if the brushless motor receives an external shock or undergoes a significant temperature change, the main permanent resin magnet will not unnecessarily separate from the back yoke due to the fit between the projections and recesses.
第１図は本発明の第１の一実施例における側断面図、第
２図は本発明の第２の一実施例における側断面図、第３
図は本発明の第３の一実施例における側断面図、第４図
は本発明の第４の一実施例における側断面図、第５図は
本発明の第５の一実施例における側断面図、第６図は従
来例のブラシレスモータにおける側断面図である。
７・・・・・固定子巻線、１８．’２６．２９．３０゜
３２・・・・・・主永久用ｎＦ５ Ｌ’Ｊ石、１９．２
５．２８゜３４・・・・・・バックヨーク、２１・・・
・・・回転子、２２・・・・・・固定子板、２３・・・
・・・固定子、４０・・・・・・回転周波数検出手段。
代理人の氏名 弁理士 中尾敏男 はか１名７−１セ多
各紘
イδ−−−芝→（ス？ｒ７１５１λ石
＋９−−−ハ、７３−９
２１−−− ’３社１
？５−１でＪ２ヨーク
７−！２壬ｉ本（
２２−ｍ−・・ ｇ
Ｑ８−＝でッ７ヨー７FIG. 1 is a side sectional view of a first embodiment of the present invention, FIG. 2 is a side sectional view of a second embodiment of the present invention, and FIG.
The figure is a side sectional view of a third embodiment of the present invention, FIG. 4 is a side sectional view of a fourth embodiment of the present invention, and FIG. 5 is a side sectional view of a fifth embodiment of the present invention. 6 are side sectional views of a conventional brushless motor. 7...Stator winding, 18. '26.29.30゜32... Main permanent nF5 L'J stone, 19.2
5.28゜34...Back yoke, 21...
...Rotor, 22...Stator plate, 23...
. . . Stator, 40 . . . Rotation frequency detection means. Name of agent Patent attorney Toshio Nakao Haka 1 person 7-1 Seta each Hiroi δ --- Shiba → (S? r7151λ stone + 9 --- Ha, 73-9 21 --- '3 companies 1 ? 5 -1 and J2 yoke 7-!2 I book (22-m-... g Q8-=de7 yoke 7
Claims (1)
に複数の着磁が施された円環状または円板状の主永久樹
脂磁石と、その主永久樹脂磁石の第２の平面部側に配さ
れた磁性材料製のバックヨークとを含めてなる回転子と
、前記主永久樹脂磁石の第１の平面部に対向して固定子
巻線が固定子板上に施された固定子と、前記主永久樹脂
磁石の外周面近傍に設けられ、前記主永久樹脂磁石外周
面に施された着磁を検出することにより前記回転子の回
転周波数を検出する回転周波数検出手段とを具備し、か
つ前記バックヨークを一体的に保持するように、前記主
永久樹脂磁石を成型により形成したことを特徴とするブ
ラシレスモータ。A main permanent resin magnet in the form of an annular or disk shape, the first flat part of which is magnetized with a predetermined number of poles, and the outer peripheral surface of which is magnetized with a plurality of magnetizations, and a second permanent resin magnet of the main permanent resin magnet. A rotor including a back yoke made of a magnetic material arranged on the flat side of the main permanent resin magnet, and a stator winding arranged on the stator plate facing the first flat part of the main permanent resin magnet. a stator, and a rotational frequency detecting means provided near the outer circumferential surface of the main permanent resin magnet for detecting the rotational frequency of the rotor by detecting magnetization applied to the outer circumferential surface of the main permanent resin magnet. A brushless motor comprising: the main permanent resin magnet formed by molding so as to integrally hold the back yoke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61206348A JP2563276B2 (en) | 1986-09-02 | 1986-09-02 | Brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61206348A JP2563276B2 (en) | 1986-09-02 | 1986-09-02 | Brushless motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6364561A true JPS6364561A (en) | 1988-03-23 |
| JP2563276B2 JP2563276B2 (en) | 1996-12-11 |
Family
ID=16521817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61206348A Expired - Fee Related JP2563276B2 (en) | 1986-09-02 | 1986-09-02 | Brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2563276B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5066072A (en) * | 1989-08-23 | 1991-11-19 | Jidosha Kiki Co., Ltd. | Hydraulic brake pressure control valve |
| JP2016096683A (en) * | 2014-11-17 | 2016-05-26 | 日本電産サンキョー株式会社 | motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59220060A (en) * | 1983-05-25 | 1984-12-11 | Takahashi Yoshiteru | Brushless motor with frequency generator |
| JPS60187251A (en) * | 1984-03-02 | 1985-09-24 | Shikoo Giken:Kk | Disc-shaped brushless motor containing frequency generator |
| JPS6118339A (en) * | 1984-07-03 | 1986-01-27 | Matsushita Electric Ind Co Ltd | Brushless motor |
| JPS6196780U (en) * | 1984-11-26 | 1986-06-21 |
-
1986
- 1986-09-02 JP JP61206348A patent/JP2563276B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59220060A (en) * | 1983-05-25 | 1984-12-11 | Takahashi Yoshiteru | Brushless motor with frequency generator |
| JPS60187251A (en) * | 1984-03-02 | 1985-09-24 | Shikoo Giken:Kk | Disc-shaped brushless motor containing frequency generator |
| JPS6118339A (en) * | 1984-07-03 | 1986-01-27 | Matsushita Electric Ind Co Ltd | Brushless motor |
| JPS6196780U (en) * | 1984-11-26 | 1986-06-21 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5066072A (en) * | 1989-08-23 | 1991-11-19 | Jidosha Kiki Co., Ltd. | Hydraulic brake pressure control valve |
| JP2016096683A (en) * | 2014-11-17 | 2016-05-26 | 日本電産サンキョー株式会社 | motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2563276B2 (en) | 1996-12-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |