JP3301978B2 - Centralized winding brushless DC motor - Google Patents
Centralized winding brushless DC motorInfo
- Publication number
- JP3301978B2 JP3301978B2 JP34018398A JP34018398A JP3301978B2 JP 3301978 B2 JP3301978 B2 JP 3301978B2 JP 34018398 A JP34018398 A JP 34018398A JP 34018398 A JP34018398 A JP 34018398A JP 3301978 B2 JP3301978 B2 JP 3301978B2
- Authority
- JP
- Japan
- Prior art keywords
- motor
- stator
- brushless
- tooth
- inner diameter
- 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.)
- Ceased
Links
- 238000004804 winding Methods 0.000 title claims description 26
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 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)
Description
【０００１】[0001]
【発明の属する技術分野】本発明はモータのステータの
構造に特徴を有し、密閉型圧縮機の駆動用モータに用い
るに適した集中巻方式のブラシレスＤＣモータに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concentrated winding type brushless DC motor which is characterized by a structure of a motor stator and is suitable for use as a drive motor of a hermetic compressor.
【０００２】[0002]
【従来の技術】最近、エアコン等の空調機器の普及に伴
って、形状的には小型化が、省電力のためにはエネルギ
ー効率のアップが求められており、特に空調機器の密閉
型圧縮機に用いられる駆動用モータは小型化と高効率化
が望まれている。2. Description of the Related Art Recently, with the spread of air conditioners such as air conditioners, it has been required to reduce the size in terms of shape, but to increase energy efficiency in order to save power. It is desired that the driving motor used in the vehicle be reduced in size and increased in efficiency.
【０００３】従来、一般に密閉型圧縮機の駆動用モータ
には分布巻方式のブラシレスＤＣモータが用いられてい
るが、本出願人は製造工程の簡素化と小型化及び効率ア
ップのために集中巻方式のブラシレスＤＣモータを提案
した。Conventionally, a brushless DC motor of a distributed winding type is generally used as a drive motor for a hermetic compressor. However, the applicant of the present invention has concentrated winding to simplify the manufacturing process, reduce the size and increase the efficiency. A brushless DC motor of the type was proposed.
【０００４】集中巻方式のブラシレスＤＣモータは図４
に示すようにステータ１とロータ２により構成されてい
て、ステータは図４（Ａ）のような形状であり、ステー
タ板（珪素鋼板）を積層してステータコア１１を形成し
ている。ステータコア１１は歯部１２が設けられ、歯部
１２は所定の歯幅を有しその両脇にはロータの面に沿っ
て歯部先端部１３が設けられている。この歯部１２にス
ロット部の空間を利用して駆動コイル（図示せず）を直
接巻回し、所謂、集中直巻方式によってステータ１の磁
極を形成し、この例では４極６スロットのステータを示
している。A concentrated winding type brushless DC motor is shown in FIG.
As shown in FIG. 4, the stator is constituted by a stator 1 and a rotor 2, and the stator has a shape as shown in FIG. 4A, and a stator core 11 is formed by stacking stator plates (silicon steel plates). The stator core 11 is provided with a tooth portion 12, and the tooth portion 12 has a predetermined tooth width, and tooth end portions 13 are provided on both sides thereof along the surface of the rotor. A drive coil (not shown) is directly wound around the tooth portion 12 using the space of the slot portion, and the magnetic poles of the stator 1 are formed by a so-called concentrated series winding method. In this example, a stator having four poles and six slots is used. Is shown.
【０００５】このことにより、分布巻方式のブラシレス
ＤＣモータのステータに比して小型に形成することがで
きる。そしてステータコア１の形状は図５の平面図のよ
うになり、歯部１２の両脇に歯部先端部１３をロータの
面に沿ってロータとの距離が一様に等間隔になるように
形成される。[0005] This makes it possible to reduce the size of the stator of the brushless DC motor of the distributed winding type. The shape of the stator core 1 is as shown in the plan view of FIG. 5, and tooth tip portions 13 are formed on both sides of the tooth portion 12 so that the distance from the rotor is evenly spaced along the rotor surface. Is done.
【０００６】また、ロータ２は図４（Ｂ）のような形状
であり、珪素鋼板を積層してロータコア２１を形成して
いる。ロータコア２１には永久磁石２２が埋め込まれて
いる。ロータ２の永久磁石２２としては通常のフェライ
ト系の磁石でもよいが、モータの小型化のためにはＢＨ
積の大きい磁石、即ち、ネオジューム、鉄、ボロンから
なるネオジ磁石、またサマリウムコバルト系磁石など
の、所謂、希土類磁石等を用いることができる。The rotor 2 has a shape as shown in FIG. 4B, and a rotor core 21 is formed by laminating silicon steel plates. A permanent magnet 22 is embedded in the rotor core 21. As the permanent magnet 22 of the rotor 2, an ordinary ferrite magnet may be used.
A so-called rare earth magnet such as a magnet having a large product, that is, a neodymium magnet made of neodymium, iron, or boron, or a samarium-cobalt-based magnet can be used.
【０００７】このように形成されたステータ１の中心に
ロータ２を挿入して集中巻方式のブラシレスＤＣモータ
を構成する。ステータコア１１の歯部１２にスロット部
の空間を利用して駆動コイル（図示せず）を直接巻回し
て集中直巻方式によってステータ１の磁極を形成する際
に、ステータコア１１の歯部先端部１３の先端は図３に
示すようになり、歯部先端部１３の先端Ａ点、Ａ’点を
結ぶ線Ａと、歯部１２の内径の接線Ｂからの距離Ｔが、
Ｔ≦０（ステータ内径寄り）となり、１スロットピッチ
が６０度と大きく、駆動コイルを開口部付近まで巻き付
けてしまうと、コイルエンドの内側はステータ内径をは
み出してしまうことがあった。The rotor 2 is inserted into the center of the stator 1 thus formed to constitute a concentrated winding type brushless DC motor. When a driving coil (not shown) is directly wound around the tooth portion 12 of the stator core 11 by utilizing the space of the slot portion to form the magnetic pole of the stator 1 by the concentrated series winding method, the tooth tip portion 13 of the stator core 11 is formed. As shown in FIG. 3, the distance T from the line A connecting the point A and the point A ′ of the tooth tip 13 and the distance T from the tangent B of the inner diameter of the tooth 12 is
When T ≦ 0 (closer to the stator inner diameter), the pitch of one slot is as large as 60 degrees, and when the drive coil is wound around the opening, the inside of the coil end may protrude beyond the stator inner diameter.
【０００８】従来、このコイルエンドのステータ内径は
み出しを防止するために、ステータ内径側に壁となるよ
うに、スロット絶縁紙と一体に形成された樹脂等の成形
品を使用している。この樹脂成形品によるコイルの内径
はみ出し防止構造は、コイルの高占有率化およびコイル
に太線を使用すると、巻線時にこの樹脂成形品に強いス
トレスが加わり倒れたり、割れ等が発生してしまう等の
問題があった。このため強度を確保するために樹脂成形
品の厚みを増加させると、冷媒を使用する密閉型圧縮機
の場合には樹脂から析出するオリゴマの発生が問題とな
った。Heretofore, in order to prevent the stator inner diameter of the coil end from protruding, a molded product such as resin formed integrally with the slot insulating paper so as to form a wall on the inner diameter side of the stator is used. The structure to prevent the inside diameter of the coil from protruding from the resin molded product is such that if the coil is occupied at a high rate and a thick wire is used for the coil, strong stress will be applied to the resin molded product during winding and the product will fall or crack, etc. There was a problem. For this reason, when the thickness of the resin molded product is increased in order to secure the strength, in the case of a hermetic compressor using a refrigerant, the generation of oligomers precipitated from the resin has become a problem.
【０００９】[0009]
【発明が解決しようとする課題】そこで、本発明はステ
ータの磁極を形成する際に、駆動コイルをステータコア
の歯部の開口部付近まで巻き付けてもコイルエンドの内
側がステータ内径をはみ出すことを防止した集中巻方式
のブラシレスＤＣモータを提供することを目的とする。Accordingly, the present invention prevents the inside of the coil end from protruding beyond the inner diameter of the stator even when the drive coil is wound near the opening of the teeth of the stator core when forming the magnetic pole of the stator. It is an object of the present invention to provide a concentrated winding type brushless DC motor.
【００１０】この発明の請求項１に係る集中巻方式のブ
ラシレスＤＣモータは、ステータコアを有する集中巻方
式のモータにおいて、ステータコアの歯部先端部の左右
先端Ａ点、Ａ'点を結ぶ線Ａの歯部の内径の接線Ｂから
の距離Ｔが、Ｔ≧０（ステータ外径寄り）となるように
構成した。According to a first aspect of the present invention, there is provided a concentrated winding type brushless DC motor having a concentrated winding type having a stator core.
In the motor of the formula, the distance T from the tangent B to the inner diameter of the tooth portion of the line A connecting the point A and the point A ′ of the tip portion of the tooth portion of the stator core is such that T ≧ 0 (closer to the stator outer diameter). Configured.
【００１１】この発明の請求項２に係る集中巻方式のブ
ラシレスＤＣモータは、ステータコアの歯部先端部に、
歯部部分を除く開口部までの内径側歯部にカット部を設
けるように構成した。 According to a second aspect of the present invention, there is provided a concentrated winding type brushless DC motor , comprising:
Cuts are provided on the teeth on the inner diameter side up to the opening except for the teeth.
It was configured so that
【００１２】この発明の請求項３に係る集中巻方式のブ
ラシレスＤＣモータは、前記カット部は歯部部分を除く
開口部までの内径側歯部の片側に設けるように構成し
た。 In a brushless DC motor of a concentrated winding type according to a third aspect of the present invention, the cut portion excludes a tooth portion.
It is configured to be provided on one side of the inner diameter side tooth part up to the opening.
Was.
【００１３】この発明の請求項３に係る集中巻方式のブ
ラシレスＤＣモータは、前記カット部は歯部部分を除く
開口部までの内径側歯部の両側に設けるように構成し
た。 In a brushless DC motor of a concentrated winding type according to a third aspect of the present invention, the cut portion excludes a tooth portion.
It is configured so that it is provided on both sides of the inner diameter side tooth part up to the opening.
Was.
【００１４】これにより、ブラシレスＤＣモータのステ
ータを小型に形成することができると共に、ステータの
磁極を形成する際に、樹脂成形品を使用することなく、
駆動コイルをステータコアの歯部の開口部付近まで巻き
付けてもコイルエンドの内側がステータ内径をはみ出す
ことを防止した集中巻方式のブラシレスＤＣモータを実
現できる。[0014] Thus, the stator of the brushless DC motor can be formed in a small size, and when forming the magnetic poles of the stator, it is possible to use a resin molded product without using a resin molded product.
A brushless DC motor of a concentrated winding type in which the inside of the coil end is prevented from protruding beyond the inner diameter of the stator even when the drive coil is wound around the opening of the teeth of the stator core.
【００１５】[0015]
【発明の実施の形態】次に、本発明の集中巻方式のブラ
シレスＤＣモータを、図を参照して説明する。本発明
は、図３、図５のように、ステータコア１の形状が歯部
１２の両脇に歯部先端部１３をロータの面に沿ってロー
タとの距離が一様に等間隔になるように形成されたもの
にも適用できるが、トルク変動を小さくし、モータ回転
の振動を防止する目的で、本出願人が提案している集中
巻方式のブラシレスＤＣモータで説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a concentrated winding type brushless DC motor according to the present invention will be described with reference to the drawings. According to the present invention, as shown in FIGS. 3 and 5, the shape of the stator core 1 is such that the tooth tip portions 13 on both sides of the tooth portion 12 are uniformly spaced from the rotor along the surface of the rotor. However, for the purpose of reducing torque fluctuation and preventing vibration of motor rotation, a concentrated winding type brushless DC motor proposed by the present applicant will be described.
【００１６】図１（Ｂ）はステータコア１１の一部を拡
大したものであり、ステータコア１１の歯部１２の先端
形状において、歯部部分を除く開口部までの歯部先端部
１３の内径側にカット部ａ、ｂを設けたものである。ス
テータコア１１の全体正面図は、図２に示すように、４
極６スロットのものである。FIG. 1B is an enlarged view of a part of the stator core 11. In the tip shape of the teeth 12 of the stator core 11, the inner diameter of the teeth tip 13 up to the opening excluding the teeth is shown. The cut portions a and b are provided. The overall front view of the stator core 11 is, as shown in FIG.
It has 6 slots.
【００１７】そして、歯部１２の両脇に延長して形成さ
れる歯部先端部１３を、その一部ａ、ｂをカットして除
去したものである。カット部分はロータ２の回転が向か
う方向の歯部先端部１３のみ、例えばａの片側で十分で
あるが、モータの組立時にステータ１のどちらの方向か
らもロータ２を挿入できるように、歯部先端部１３の他
方ｂもカットする。このように、両側の歯部先端部１３
をカットしてもモータのトルク特性に与える影響は無視
できる程度である。The tooth tip 13 formed to extend on both sides of the tooth 12 is removed by cutting a part b thereof. The cut portion is sufficient only at the tooth tip portion 13 in the direction in which the rotation of the rotor 2 is directed, for example, one side of a is sufficient. However, the tooth portions are inserted so that the rotor 2 can be inserted from either direction of the stator 1 during assembly of the motor. The other b of the tip 13 is also cut. Thus, the tooth tip portions 13 on both sides
The effect on the torque characteristics of the motor is negligible even if is cut.
【００１８】図１（Ａ）はステータコア１１の一部を拡
大し、１個の歯部１２に注目したものであり、歯部１２
は所定の歯幅を有し、歯部部分を除く開口部までの内径
側歯部の左右に歯部先端部１３が形成されている。ステ
ータの歯部先端部１３の線（ライン）Ｄと線（ライン）
Ｃの交点となる左右先端をそれぞれＡ点、Ａ’点とし、
その両点を結ぶ線（ライン）Ａの歯部の内径の接線（ラ
イン）Ｂを基準として、接線（ライン）Ｂからの距離Ｔ
が、Ｔ≧０（ステータ外径寄り）となるように形成す
る。FIG. 1A is an enlarged view of a part of the stator core 11 and focuses on one tooth portion 12.
Has a predetermined tooth width, and tooth tip portions 13 are formed on the right and left sides of the inner diameter side tooth portion up to the opening except the tooth portion. Line (line) D and line (line) of stator tooth tip 13
The left and right ends that are the intersections of C are point A and point A ', respectively.
The distance T from the tangent (line) B is determined based on the tangent (line) B of the inner diameter of the tooth portion of the line (line) A connecting the two points
Are formed so that T ≧ 0 (closer to the stator outer diameter).
【００１９】このようにステータの歯部先端部１３を形
成することにより、ステータの磁極を形成する際に、駆
動コイルをステータコアの歯部の開口部付近まで巻き付
けてもコイルエンドの内側がステータ内径をはみ出すこ
とを防止することができる。By forming the teeth 13 of the stator in this way, when forming the magnetic poles of the stator, even if the drive coil is wound near the opening of the teeth of the stator core, the inside of the coil end is the inner diameter of the stator. Can be prevented from protruding.
【００２０】[0020]
【発明の効果】以上のように、本発明は、ブラシレスＤ
Ｃモータのステータを小型に形成することができ、ステ
ータの磁極を形成する際に、樹脂成形品を使用すること
なく、駆動コイルをステータコアの歯部の開口部付近ま
で巻き付けてもコイルエンドの内側がステータ内径をは
み出すことを防止した集中巻方式のブラシレスＤＣモー
タを実現できる。As described above, the present invention provides a brushless D
The stator of the C motor can be formed in a small size, and when forming the magnetic poles of the stator, the drive coil is wound around the opening of the teeth of the stator core without using a resin molded product. A brushless DC motor of a concentrated winding type, in which the brushless DC motor does not protrude beyond the stator inner diameter, can be realized.
【図１】本発明のステータコアの一部拡大図。FIG. 1 is a partially enlarged view of a stator core of the present invention.
【図２】本発明のステータコアの平面図。FIG. 2 is a plan view of a stator core according to the present invention.
【図３】従来のステータコアの一部拡大図。FIG. 3 is a partially enlarged view of a conventional stator core.
【図４】集中巻方式のブラシレスＤＣモータのステータ
とロータ。FIG. 4 shows a stator and a rotor of a concentrated winding type brushless DC motor.
【図５】従来のステータコアの平面図。FIG. 5 is a plan view of a conventional stator core.
１ ステータ １１ ステータコア １２ 歯部 １３ 歯部先端部 ２ ロータ ２１ ロータコア ２２ 磁石 DESCRIPTION OF SYMBOLS 1 Stator 11 Stator core 12 Tooth 13 Tooth tip 2 Rotor 21 Rotor core 22 Magnet
───────────────────────────────────────────────────── フロントページの続き (72)発明者 簗島 俊人 大阪府守口市京阪本通２丁目５番５号 三洋電機株式会社内 (72)発明者 五十嵐 恵司郎 大阪府守口市京阪本通２丁目５番５号 三洋電機株式会社内 (72)発明者 小礒 繁美 大阪府守口市京阪本通２丁目５番５号 三洋電機株式会社内 (56)参考文献 特開 平３−93437（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02K 1/16 H02K 21/16 H02K 29/00 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshito Yanajima 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Keishiro Igarashi 2 Keihanhondori, Moriguchi-shi, Osaka No.5-5 Sanyo Electric Co., Ltd. (72) Inventor Shigemi Koiso 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-3-93437 (JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) H02K 1/16 H02K 21/16 H02K 29/00
Claims (4)
タにおいて、ステータコアの歯部先端部の左右先端Ａ
点、Ａ'点を結ぶ線Ａの歯部の内径の接線Ｂからの距離
Ｔが、Ｔ≧０（ステータ外径寄り）となることを特徴と
する集中巻方式のブラシレスＤＣモータ。1. A concentrated winding type motor having a stator core.
The left and right ends A of the teeth of the stator core.
A brushless DC motor of a concentrated winding type, wherein a distance T from a tangent B of an inner diameter of a tooth portion of a line A connecting a point A and a point A is T ≧ 0 (closer to an outer diameter of a stator).
を除く開口部までの内径側歯部にカット部を設けたこと
を特徴とする請求項１記載の集中巻方式のブラシレスＤ
Ｃモータ。2. A tooth portion is provided at a tooth tip of a stator core.
The cut part is provided on the inner diameter side tooth part to the opening except for
2. The concentrated winding type brushless D according to claim 1, wherein
C motor.
での内径側歯部の片側に設けたことを特徴とする請求項
２記載の集中巻方式のブラシレスＤＣモータ。3. The concentrated winding type brushless DC motor according to claim 2, wherein the cut portion is provided on one side of the inner diameter side tooth portion up to the opening except the tooth portion.
での内径側歯部の両側に設けたことを特徴とする請求項
２記載の集中巻方式のブラシレスＤＣモータ。4. A brushless DC motor of a concentrated winding type according to claim 2, wherein said cut portions are provided on both sides of an inner diameter side tooth portion up to an opening except a tooth portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34018398A JP3301978B2 (en) | 1998-11-30 | 1998-11-30 | Centralized winding brushless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34018398A JP3301978B2 (en) | 1998-11-30 | 1998-11-30 | Centralized winding brushless DC motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000166134A JP2000166134A (en) | 2000-06-16 |
| JP3301978B2 true JP3301978B2 (en) | 2002-07-15 |
Family
ID=18334522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34018398A Ceased JP3301978B2 (en) | 1998-11-30 | 1998-11-30 | Centralized winding brushless DC motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3301978B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008105049A1 (en) | 2007-02-26 | 2008-09-04 | Mitsubishi Electric Corporation | Permanent magnet motor, hermetic compressor, and fan motor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007074898A (en) * | 2006-12-15 | 2007-03-22 | Hitachi Ltd | Permanent magnet type rotating electric machine and compressor using the same |
| WO2017122445A1 (en) * | 2016-01-12 | 2017-07-20 | 三菱電機株式会社 | Stator for rotary electric machine, rotary electric machine, and method for manufacturing stator for rotary electric machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2703066B2 (en) * | 1989-09-06 | 1998-01-26 | 株式会社日立製作所 | Electric motor |
-
1998
- 1998-11-30 JP JP34018398A patent/JP3301978B2/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008105049A1 (en) | 2007-02-26 | 2008-09-04 | Mitsubishi Electric Corporation | Permanent magnet motor, hermetic compressor, and fan motor |
| US8714948B2 (en) | 2007-02-26 | 2014-05-06 | Mitsubishi Electric Corporation | Permanent magnet motor, hermetic compressor, and fan motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000166134A (en) | 2000-06-16 |
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| RVOP | Cancellation by post-grant opposition |