JPH08256463A - Brushless electric rotating machine - Google Patents
Brushless electric rotating machineInfo
- Publication number
- JPH08256463A JPH08256463A JP5850495A JP5850495A JPH08256463A JP H08256463 A JPH08256463 A JP H08256463A JP 5850495 A JP5850495 A JP 5850495A JP 5850495 A JP5850495 A JP 5850495A JP H08256463 A JPH08256463 A JP H08256463A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic poles
- electric machine
- coil
- brushless
- poles
- 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.)
- Withdrawn
Links
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 244000144992 flock Species 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 6
- 238000004804 winding Methods 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Brushless Motors (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はブラシレス回転電機に関
し、特にラジアルフラックス方式の三相８極構造のもの
に適用して有用なものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brushless rotary electric machine, and is particularly useful when applied to a radial flux type three-phase eight-pole structure.
【０００２】[0002]
【従来の技術】図５はラジアルフラックス方式の三相８
極６コイル方式のブラシレス回転電機を概念的に示す説
明図である。同図に示すように、この固定子１は、円周
方向に亘り等間隔に配設された６個の磁極２ａ，２ｂ，
２ｃ，２ｄ，２ｅ，２ｆを有するとともに、各磁極２ａ
〜２ｆにはコイル３ａ，３ｂ，３ｃ，３ｄ，３ｅ，３ｆ
がそれぞれ図に示す方向に卷回してあり、交互にＮ極及
びＳ極を形成している。2. Description of the Related Art FIG. 5 is a radial flux type three-phase 8
It is explanatory drawing which shows notionally the pole 6 coil system brushless rotary electric machine. As shown in the figure, the stator 1 includes six magnetic poles 2a, 2b, which are arranged at equal intervals along the circumferential direction.
2c, 2d, 2e, 2f, and each magnetic pole 2a
The coils 3a, 3b, 3c, 3d, 3e, and 3f are included in to 2f.
Are respectively wound in the directions shown in the drawing, and N poles and S poles are alternately formed.
【０００３】回転子４は、回転軸５と一体となってこの
回転軸５の回りに回転する円筒部６とこの円筒部６の外
周面に固着されて円周方向に亘り交互にＮ極及びＳ極と
なる８個の永久磁石７ａ，７ｂ，７ｃ，７ｄ，７ｅ，７
ｆ，７ｇ，７ｈとを有している。The rotor 4 is fixed to a cylindrical portion 6 which rotates integrally with the rotating shaft 5 and rotates around the rotating shaft 5, and is fixed to the outer peripheral surface of the cylindrical portion 6 so as to alternately have N poles and N poles in the circumferential direction. Eight permanent magnets 7a, 7b, 7c, 7d, 7e, 7 serving as S poles
f, 7g, 7h.
【０００４】[0004]
【発明が解決しようとする課題】上述の如き従来技術に
おいては、コイル３ａ〜３ｆを各磁極２ａ〜２ｆに１個
づつ対応させて卷回している。すなわち、磁極２ａ〜２
ｆの数（６個）とコイル３ａ〜３ｆの数とは同数であ
る。したがって、同様に三相８極方式であってもコイル
の数を減らすことができれば、その分コストの低減に寄
与することができることは明らかである。In the prior art as described above, the coils 3a to 3f are wound so as to correspond to the magnetic poles 2a to 2f one by one. That is, the magnetic poles 2a to 2
The number of f (six) and the number of coils 3a to 3f are the same. Therefore, it is apparent that even if the three-phase eight-pole system is used, the number of coils can be reduced, which can contribute to the cost reduction.
【０００５】本発明は、上記従来技術に鑑み、磁極数に
より決まるコイルの数を減ずることができるブラシレス
回転電機を提供することを目的とする。In view of the above-mentioned prior art, it is an object of the present invention to provide a brushless rotating electric machine capable of reducing the number of coils determined by the number of magnetic poles.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成する本発
明の構成は、回転軸と一体となってこの回転軸の回りに
回転する円筒部の外周面に、円周方向に亘り交互にＮ極
及びＳ極が並ぶように永久磁石を固着した回転子を有す
るブラシレス回転電機において、固定子が、棒状のコア
の周囲に卷回したコイルと、コアの両端にそれぞれ当接
して磁気的に結合された独立の２個のブロックであるポ
ールピースからなるとともにコイルに対する通電により
互いに異磁極となる磁極とを有することを特徴とする。The structure of the present invention which achieves the above object is such that the outer peripheral surface of a cylindrical portion which rotates integrally with a rotary shaft and rotates about the rotary shaft is alternated by N in the circumferential direction. In a brushless rotating electric machine having a rotor to which permanent magnets are fixed so that the poles and the S poles are arranged side by side, a stator is magnetically coupled to a coil wound around a rod-shaped core by abutting on both ends of the core. It is characterized in that it is composed of two independent pole pieces, and has magnetic poles that are different from each other by energizing the coil.
【０００７】上記発明において、回転子が、例えば８個
の永久磁石を有するとき、固定子は、１個のコイルと２
個一組の磁極とを、この一組の磁極が９０°の範囲で永
久磁石とそれぞれ相対向するように構成した３個のブロ
ックを、円周方向に亘り１２０°の間隔で配設したもの
であることを特徴とする。In the above invention, when the rotor has, for example, eight permanent magnets, the stator has one coil and two coils.
One set of magnetic poles, and three blocks in which the set of magnetic poles face the permanent magnets in the range of 90 ° are arranged at intervals of 120 ° in the circumferential direction. Is characterized in that.
【０００８】また、１個のコイルと２個一組の磁極とを
有するブロックを軸方向に亘り複数個並設したことも特
徴とする。It is also characterized in that a plurality of blocks each having one coil and a pair of magnetic poles are arranged in parallel in the axial direction.
【０００９】[0009]
【作用】上記構成の本発明によれば、１個のコイルで２
個の磁極を作ることができる。また、１個のコイル及び
２個一組の磁極を、軸方向に適宜多段に並設することに
より定格を任意に調整し得る。According to the present invention having the above-mentioned structure, one coil is used for 2
You can make individual magnetic poles. In addition, the rating can be arbitrarily adjusted by arranging one coil and a pair of magnetic poles in parallel in the axial direction in appropriate multistage.
【００１０】[0010]
【実施例】以下本発明の実施例を図面に基づき詳細に説
明する。Embodiments of the present invention will now be described in detail with reference to the drawings.
【００１１】本実施例に係るブラシレス回転電機の回転
子は、図５に示すものと同様である。そこで、同一部分
には同一番号を付し、重複する説明は省略する。The rotor of the brushless rotary electric machine according to this embodiment is the same as that shown in FIG. Therefore, the same parts are denoted by the same reference numerals, and duplicate description will be omitted.
【００１２】図１は本実施例に係るブラシレス回転電機
の主要構成要素を抽出して示す正面図、図２はその縦断
面図である。両図において、１１ａ，１１ｂ，１１ｃは
コイル、１２ａ，１２ｂ，１２ｃはコア、１３ａ，１３
ｂ，１３ｃ，１３ｄ，１３ｅ，１３ｆは磁極、１４は非
磁性材のブラケット、１５は基板、１６はホールセン
サ、１７ａ，１７ｂは軸受である。なお、図１におい
て、回転軸５、ロータヨークである円筒体６、ブラケッ
ト１４、基板１５、ホールセンサ１６及び軸受１７ａ，
１７ｂは省略してある。FIG. 1 is a front view showing extracted main constituent elements of the brushless rotating electric machine according to this embodiment, and FIG. 2 is a vertical sectional view thereof. In both figures, 11a, 11b, 11c are coils, 12a, 12b, 12c are cores, 13a, 13
b, 13c, 13d, 13e and 13f are magnetic poles, 14 is a non-magnetic material bracket, 15 is a substrate, 16 is a Hall sensor, and 17a and 17b are bearings. In FIG. 1, the rotary shaft 5, the cylindrical body 6, which is the rotor yoke, the bracket 14, the substrate 15, the hall sensor 16, and the bearing 17a,
17b is omitted.
【００１３】コイル１１ａ〜１１ｃは、ボビン巻きによ
る集中巻きで構成したものであり、棒状のコア１２ａ〜
１２ｃの周囲に卷回してある。コア１２ａ〜１２ｃは方
向性硅素鋼板を積層して形成する。この方向性硅素鋼板
は、磁束密度が高く、鉄損が少なく安価であるという特
長を有しており、本実施例の場合には、その長方形のも
のをプレス抜きして積層しており、プレス作業時の無駄
が極めて少なく材料の歩留りも良好に保持することがで
きる。The coils 11a to 11c are formed by concentrated winding by bobbin winding, and the rod-shaped cores 12a to 12c.
It is wound around 12c. The cores 12a to 12c are formed by stacking grain-oriented silicon steel sheets. This grain-oriented silicon steel sheet has the features of high magnetic flux density, low iron loss and low cost.In the case of the present embodiment, the rectangular ones are punched out and laminated. The waste during the work is extremely small, and the material yield can be kept excellent.
【００１４】磁極（１３ａ，１３ｂ），（１３ｃ，１３
ｄ），（１３ｅ，１３ｆ）はコア１２ａ，１２ｂ，１２
ｃの両端にそれぞれ当接して磁気的に結合された独立の
２個のブロックであるプレス焼結により得るフェライト
コアで形成したポールピースからなるとともに、コイル
１１ａ〜１１ｃに対する通電により、それぞれ互いに異
磁極となるように構成してある。この結果、１個のコイ
ル１１ａ，１１ｂ，１１ｃと２個一組の磁極（１３ａ，
１３ｂ），（１３ｃ，１３ｄ），（１３ｅ，１３ｆ）と
で形成する同構成の３個のブロックを円周方向に亘り１
２０°間隔で配設して構成したものとなっている。この
各ブロックにおける２個一組の磁極（１３ａ，１３
ｂ），（１３ｃ，１３ｄ），（１３ｅ，１３ｆ）は９０
°の範囲で永久磁石７ａ〜７ｈとそれぞれ相対向するよ
うに構成してある。Magnetic poles (13a, 13b), (13c, 13)
d), (13e, 13f) are cores 12a, 12b, 12
It is composed of a pole piece formed of a ferrite core obtained by press sintering which is two independent blocks that are magnetically coupled to both ends of c and have different magnetic poles by energizing the coils 11a to 11c. It is configured so that As a result, one coil 11a, 11b, 11c and a set of two magnetic poles (13a,
13b), (13c, 13d), and (13e, 13f), three blocks of the same structure formed in the circumferential direction 1
It is arranged at 20 ° intervals. A set of two magnetic poles (13a, 13a) in each block
b), (13c, 13d), (13e, 13f) is 90
The permanent magnets 7a to 7h are arranged to face each other in the range of °.
【００１５】図３は、上記ブロックの組立て時の態様を
示す斜視図である。同図に示すように、コア１２ａ〜１
２ｃに巻回したコイル１１ａ〜１１ｃは、コア１２ａ〜
１２ｃの両端部を介して磁極（１３ａ，１３ｂ）〜（１
３ｅ，１３ｆ）に載置されるが、このとき磁極１３ａ〜
１３ｆの軸方向の寸法Ｌ1 よりもコイル１１ａ〜１１ｃ
の同方向の寸法Ｌ2 を小さく構成しておくことによりコ
イル１１ａ〜１１ｃが磁極１３ａ〜１３ｆの端面から軸
方向に関し、突出しないように構成することができる。FIG. 3 is a perspective view showing a mode of assembling the block. As shown in FIG.
The coils 11a to 11c wound around 2c are the cores 12a to 11c.
The magnetic poles (13a, 13b) to (1
3e, 13f), but at this time, the magnetic poles 13a ...
The coils 11a to 11c are larger than the axial dimension L 1 of 13f.
By setting the dimension L 2 in the same direction to be small, the coils 11a to 11c can be configured not to project in the axial direction from the end faces of the magnetic poles 13a to 13f.
【００１６】かかる構成とすることにより図４に示すよ
うな多段構造の回転電機の形成が容易になる。同図に示
すように、この多段構造は１個のコイル１１ａ〜１１ｃ
及び２個一組の磁極（１３ａ，１３ｂ）〜（１３ｅ，１
３ｆ）で形成するブロックを軸方向に亘り２段並設した
ものである。この段数は勿論２段に限定されない。３段
以上でも良い。このように多段に、しかもこの段数を任
意に選択することにより所望の定格のものを容易に作製
することが可能になる。With such a structure, it becomes easy to form a rotary electric machine having a multi-stage structure as shown in FIG. As shown in the figure, this multi-stage structure has one coil 11a to 11c.
And a set of two magnetic poles (13a, 13b) to (13e, 1)
The blocks formed in 3f) are arranged side by side in two stages in the axial direction. Of course, the number of stages is not limited to two. It may be 3 or more steps. In this way, it is possible to easily manufacture a desired rating with a multiplicity of stages and by arbitrarily selecting the number of stages.
【００１７】上述の如き実施例に係る三相８極３コイル
のブラシレス回転電機は、電動機として運転する場合、
回転子４における磁極位置（永久磁石７ａ〜７ｈの位
置）をホールセンサ１６で検出し乍らコイル１１ａ〜１
１ｃに供給する電流を外部の半導体スイッチにより切換
えて通電し、コイル１１ａ〜１１ｃが作る磁束と永久磁
石７ａ〜７ｈが作る磁束の相互作用によりコイル１１ａ
〜１１ｃが作る回転磁界とともに回転子４が回転する三
相同期電動機と等価なブラシレスＤＣ電動機として機能
する。The three-phase, eight-pole, three-coil brushless rotary electric machine according to the above-mentioned embodiment is operated as an electric motor.
The magnetic pole positions (the positions of the permanent magnets 7a to 7h) on the rotor 4 are detected by the hall sensor 16 and the coils 11a to 1 are detected.
The current supplied to 1c is switched by an external semiconductor switch to be energized, and the magnetic flux generated by the coils 11a to 11c and the magnetic flux generated by the permanent magnets 7a to 7h are interacted with each other to make the coil 11a.
It functions as a brushless DC electric motor that is equivalent to a three-phase synchronous electric motor in which the rotor 4 rotates together with the rotating magnetic field created by 11c.
【００１８】このとき、各コイル１１ａ〜１１ｃは、そ
れぞれ相互に極性が異なる２個の磁極（１３ａ，１３
ｂ）〜（１３ｅ，１３ｆ）を形成するように機能する。
すなわち、３個のコイル１１ａ〜１１ｃで６個の磁極１
３ａ〜１３ｆを形成する。At this time, each of the coils 11a to 11c has two magnetic poles (13a, 13c) whose polarities are different from each other.
b) to function to form (13e, 13f).
That is, the six magnetic poles 1 are formed by the three coils 11a to 11c.
3a to 13f are formed.
【００１９】また、このとき１個のコイル１１ａ〜１１
ｃと２個一組の磁極（１３ａ，１３ｂ）〜（１３ｅ，１
３ｆ）で形成するブロックの角度を９０°としたことに
より８極（８枚の永久磁石７ａ〜７ｈ）の回転子４の２
極分（Ｎ極及びＳ極の一対分）に一致させたコイル配置
（全節巻）とすることができ、これにより１個のコイル
１１ａ〜１１ｃに誘起する起電力波形をギャップの磁束
密度分布波形と一致させることができる。この結果、三
相誘起起電力を全波整流した後の直流換算波形における
リップルを少なくすることができ、１２０°の位相差で
矩形波電流を通電する方式におけるトルクリップルを少
なくするために有効となる。At this time, one coil 11a-11
c and a pair of magnetic poles (13a, 13b) to (13e, 1)
By setting the angle of the block formed in 3f) to 90 °, 2 of the rotor 4 with 8 poles (8 permanent magnets 7a to 7h)
A coil arrangement (full-pitch winding) that matches the poles (one pair of the N pole and the S pole) can be performed, whereby the electromotive force waveform induced in one coil 11a to 11c can be distributed in the magnetic flux density distribution of the gap. Can be matched with the waveform. As a result, it is possible to reduce the ripple in the DC converted waveform after the full-wave rectification of the three-phase induced electromotive force, and it is effective for reducing the torque ripple in the method of passing the rectangular wave current with the phase difference of 120 °. Become.
【００２０】[0020]
【発明の効果】以上実施例とともに具体的に説明したよ
うに、本発明によれば１個のコイルで２個の磁極を形成
することができ、すなわち３個のコイルで６個の磁極を
形成することができるので、例えば三相８極構造のもの
であっても３個のコイルで形成することができ、三相８
極６コイル構造のものに較べ、コストの低減及び構造の
簡素化を図り得る。As described above in detail with reference to the embodiments, according to the present invention, one coil can form two magnetic poles, that is, three coils can form six magnetic poles. Therefore, even if it has a three-phase eight-pole structure, it can be formed with three coils.
The cost can be reduced and the structure can be simplified as compared with the pole 6 coil structure.
【００２１】また、１個のコイル及び２個一組の磁極で
構成するブロックを軸方向に多段構造とすることにより
所望の定格のものを任意に構成することができる。Further, a block having one coil and a set of two magnetic poles has a multistage structure in the axial direction, so that a desired rating can be arbitrarily formed.
【図１】本発明の実施例に係るブラシレス回転電機の主
要構成要素を抽出して示す正面図。FIG. 1 is a front view showing extracted main constituent elements of a brushless rotating electric machine according to an embodiment of the present invention.
【図２】本発明の実施例に係るブラシレス回転電機の縦
断面図。FIG. 2 is a vertical sectional view of a brushless rotating electric machine according to an embodiment of the present invention.
【図３】上記実施例に係るブラシレス回転電機の組立て
時の態様を示す斜視図。FIG. 3 is a perspective view showing an aspect of assembling the brushless rotary electric machine according to the above embodiment.
【図４】本発明の他の実施例に係るブラシレス回転電機
の縦断面図。FIG. 4 is a vertical cross-sectional view of a brushless rotating electric machine according to another embodiment of the present invention.
【図５】従来技術に係るブラシレス回転電機を概念的に
示す説明図。FIG. 5 is an explanatory view conceptually showing a brushless rotating electric machine according to a conventional technique.
１ 固定子 ４ 回転子 ７ａ〜７ｈ 永久磁石 １１ａ〜１１ｃ コイル １２ａ〜１２ｃ コア １３ａ〜１３ｆ 磁極 1 Stator 4 Rotor 7a-7h Permanent magnet 11a-11c Coil 12a-12c Core 13a-13f Magnetic pole
Claims (3)
に回転する円筒部の外周面に、円周方向に亘り交互にＮ
極及びＳ極が並ぶように永久磁石を固着した回転子を有
するブラシレス回転電機において、 固定子が、 棒状のコアの周囲に卷回したコイルと、 コアの両端にそれぞれ当接して磁気的に結合された独立
の２個のブロックであるポールピースからなるとともに
コイルに対する通電により互いに異磁極となる磁極とを
有することを特徴とするブラシレス回転電機。1. On the outer peripheral surface of a cylindrical portion which rotates integrally with a rotating shaft and rotates about the rotating shaft, N is alternately arranged in the circumferential direction.
In a brushless rotating electric machine having a rotor to which permanent magnets are fixed so that the poles and the S poles are arranged side by side, the stator is magnetically coupled by a coil wound around a rod-shaped core and abutting on both ends of the core, respectively. Brushless rotating electric machine, which is composed of two independent pole pieces, and has magnetic poles that are different from each other when the coil is energized.
に、 固定子は、１個のコイルと２個一組の磁極とを、この一
組の磁極が９０°の範囲で永久磁石とそれぞれ相対向す
るように構成した３個のブロックを、円周方向に亘り１
２０°の間隔で配設したものであることを特徴とする
［請求項１］に記載するブラシレス回転電機。2. The rotor has eight permanent magnets, and the stator has one coil and two pairs of magnetic poles, and the pair of magnetic poles are permanent magnets within a range of 90 °, respectively. The three blocks configured to face each other are
The brushless rotary electric machine according to claim 1, wherein the brushless rotary electric machine is arranged at intervals of 20 °.
るブロックを軸方向に亘り複数個並設したことを特徴と
する［請求項１］若しくは［請求項２］に記載するブラ
シレス回転電機。3. The brushless according to claim 1, wherein a plurality of blocks each having one coil and one pair of magnetic poles are arranged in parallel along the axial direction. Rotating electric machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5850495A JPH08256463A (en) | 1995-03-17 | 1995-03-17 | Brushless electric rotating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5850495A JPH08256463A (en) | 1995-03-17 | 1995-03-17 | Brushless electric rotating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08256463A true JPH08256463A (en) | 1996-10-01 |
Family
ID=13086260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5850495A Withdrawn JPH08256463A (en) | 1995-03-17 | 1995-03-17 | Brushless electric rotating machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08256463A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010102176A (en) * | 2008-10-24 | 2010-05-06 | Minebea Co Ltd | Driving motor for color wheel |
-
1995
- 1995-03-17 JP JP5850495A patent/JPH08256463A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010102176A (en) * | 2008-10-24 | 2010-05-06 | Minebea Co Ltd | Driving motor for color wheel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020604 |