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JP3777741B2 - Rotating electric machine - Google Patents
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JP3777741B2 - Rotating electric machine - Google Patents

Rotating electric machine Download PDF

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Publication number
JP3777741B2
JP3777741B2 JP24042697A JP24042697A JP3777741B2 JP 3777741 B2 JP3777741 B2 JP 3777741B2 JP 24042697 A JP24042697 A JP 24042697A JP 24042697 A JP24042697 A JP 24042697A JP 3777741 B2 JP3777741 B2 JP 3777741B2
Authority
JP
Japan
Prior art keywords
coil
bobbin
stator
stator coil
electrical machine
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.)
Expired - Fee Related
Application number
JP24042697A
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Japanese (ja)
Other versions
JPH1169689A (en
Inventor
敦夫 池田
顕治 上山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yaskawa Electric Corp filed Critical Yaskawa Electric Corp
Priority to JP24042697A priority Critical patent/JP3777741B2/en
Publication of JPH1169689A publication Critical patent/JPH1169689A/en
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Publication of JP3777741B2 publication Critical patent/JP3777741B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【0001】
【発明の属する技術分野】
本発明は、固定子鉄心のティース部に、固定子コイルを巻回したボビンを挿着してなる電動機などの回転電機に関するものである。
【0002】
【従来の技術】
このような構造の従来の回転電機は、図4および図5に示すようになっている。
図において、1はフレームで、軸方向の端面にブラケット2を嵌合固着している。3は前記フレーム1に嵌合固着した固定子鉄心で、ヨーク部3aとティース部3bからなっている。4は前記固定子鉄心のティース部3bに挿着したボビンで、筒状部4aと、この筒状部4aの両端に形成した鍔部4bとからなり、前記筒状部4aに固定子コイル5を巻装している。5aは前記固定子コイル5のコイル端で、各固定子コイル5を接続するために引き出している。6は回転軸で、前記ブラケット2に軸受7を介して回転自在に支承されている。8は前記回転軸5に嵌合固着した回転子鉄心で、外周部に永久磁石からなる界磁極9を固着している。
前記固定子コイル5は、ボビン4の筒状部4aに巻装されて、固定子鉄心3のティース部3bに装着されるが、外周部が露出しているので、絶縁保護のためにブラケット2との間に空隙gを設けている。
【0003】
【発明が解決しようとする課題】
ところが、従来技術では、前述のように固定子コイル5とブラケット2との間に前記空隙gを設ける必要があるため、回転電機の寸法が大きくなるという問題があり、また、同一軸方向寸法である場合は、空隙gをとるために、固定子コイル5の巻き回数を少なくする必要があり、効率が悪くなるという問題があった。
そこで、本発明は、小形で、効率のよい回転電機を提供することを目的とするものである。
【0004】
【課題を解決するための手段】
上記課題を解決するため、本発明は、筒状部と、この筒状部の両端に形成した鍔部とからなり、前記筒状部に固定子コイルを巻装したボビンを、ヨーク部とティース部からなる固定子鉄心の前記ティース部に挿着してなる回転電機において、前記ボビンを、筒状部と、少なくとも一方の鍔部とに分割して構成するとともに、前記鍔部の少なくとも軸方向端部に、コイルカバーを設けるようにしたものである。
【0005】
【発明の実施の形態】
以下、本発明の実施例を図に基づいて説明する。
回転電機の全体構成は、図4の従来例と同様であるので、説明は省略する。なお、図1および図2において、図3および図4と同一符号は、同一また相当する部分を示している。
図1は本発明の第1の実施例における回転電機の要部を示す側断面図、図2はボビンの構成と固定子コイルとの関係を示す斜視図である。
ボビン4の全体構成は、図3および図4の従来例とほぼ同様であるが、本発明ではボビン4を、筒状部4aと、一方の鍔部4bとに分割して構成するとともに、前記鍔部4bの軸方向端部に、コイルカバー4cを設けるようにしている。
固定子コイル5は、あらかじめ空芯コイルとして製作しておき、前記筒状部4aと鍔部4bに分解した状態のボビン4の前記筒状部4aに挿着する。前記固定子コイル5の装着後に、前記鍔部4bを前記筒状部4aに結合固着するとともに、前記コイルカバー4cを固定子コイル5の外周部に被せる。このようにして、固定子コイルを巻装したボビン4を構成する。その後、前記ボビン4を固定子鉄心3のティース部3aに挿着する。
前記コイルカバー4cにより、ボビン4に巻装された固定子コイル5は、外周部が絶縁保護されるので、ボビン4をブラケット2に密着させることができ、ボビン4とブラケット2との間の空隙をなくすことができる。これにより、回転電機の軸方向長さが、従来に比べて短くなる。
また、ボビン4をブラケット2に密着させることにより、固定子コイル5からの発生熱の一部を効果的にブラケットに伝え、外気中に放熱することができ、回転電機の冷却性が向上する。なお、回転電機の軸方向寸法を従来技術と同一寸法にしたときには、固定子コイルの巻装量を多くすることができ、回転電機の効率を向上することができる。
また、固定子コイルを、あらかじめ強固にコイルを巻装した空心コイルにしているので、コイル部を樹脂でモールドする場合でも、樹脂モールドの注形圧力に抗してコイルの崩れ・変形を防ぐことができる。
図3は、本発明の第2の実施例を示す斜視図で、本発明を、プリント基板10を用いて固定子コイル5の相間結線を行う電動機に適用した場合を示している。
この場合には、固定子コイル5のコイル端5aを、プリント基板10のスルーホール10aに通して、前記プリント基板10をコイルカバー4cに密着させ、この状態でコイル端5aを前記プリント基板10にハンダ付けする。
のコイルカバー4cを台座として使用することにより、プリント基板10を安定して定位置に固定することができる。
なお、本発明においては、前記コイルカバー4cをボビン4の周方向端部にも設け、固定子コイル5の絶縁保護をさらに強化するようにしてもよい。
【0006】
【発明の効果】
以上述べたように、本発明によればつぎのような効果がある。
(1) 固定子コイルの外周部に、コイルカバーを取り付けて絶縁保護をしているので、固定子コイルと、ブラケットとの間に空隙を取る必要がなく、回転電機の長さを短くして小形にすることができる。
(2) コイルカバーをブラケットに接触させることができるので、固定子コイルの発生熱の一部を効果的にブラケットに伝え、外気中に放熱することができ、回転電機の冷却性が向上する。
(3) 回転電機が従来と同一寸法である場合は、固定子コイルの巻装量を多くすることができ、回転電機の効率を向上することができる。
(4) 前記ボビンを、筒状部と鍔部とに分割して構成しているので、固定子コイルを、あらかじめ強固にコイルを巻装した空心コイルにすることができ、コイル部を樹脂でモールドする場合でも、樹脂モールドの注形圧力に抗してコイルの崩れ・変形を防ぐことができる。
(5) プリント基板を用いて固定子コイルの相間結線を行う電動機の場合には、プリント基板をコイルカバーの台座として使用すれば、プリント基板を安定して定位置に固定することができる。
【図面の簡単な説明】
【図1】本発明の第1の実施例における回転電機の要部を示す側断面図である。
【図2】本発明の第1の実施例におけるボビンの構成と固定子コイルとの関係を示す斜視図である。
【図3】本発明の第2の実施例を示す斜視図で、本発明を、プリント基板を用いて固定子コイルの相間結線を行う電動機に適用した場合を示している。
【図4】従来技術における回転電機の要部を示す側断面図である。
【図5】従来技術における固定子コイルを巻装した状態のボビンを示す斜視図である。
【符号の説明】
1 フレーム、
2 ブラケット、
3 固定子鉄心、
3a ヨーク部、
3b ティース部、
4 ボビン、
4a 筒状部、
4b 鍔部、
4c コイルカバー、
5 固定子コイル、
5a コイル端、
6 回転軸、
7 軸受、
8 回転子鉄心、
9 界磁極、
10 プリント基板、
10a スルーホール
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotating electrical machine such as an electric motor in which a bobbin around which a stator coil is wound is inserted into a tooth portion of a stator core.
[0002]
[Prior art]
The conventional rotating electrical machine having such a structure is as shown in FIGS.
In the figure, reference numeral 1 denotes a frame, and a bracket 2 is fitted and fixed to an end face in the axial direction. Reference numeral 3 denotes a stator iron core fitted and fixed to the frame 1, and includes a yoke portion 3a and a teeth portion 3b. Reference numeral 4 denotes a bobbin inserted into the tooth portion 3b of the stator core. The bobbin includes a cylindrical portion 4a and flanges 4b formed at both ends of the cylindrical portion 4a. The stator coil 5 is attached to the cylindrical portion 4a. Is wound. Reference numeral 5a denotes a coil end of the stator coil 5, which is pulled out to connect each stator coil 5. Reference numeral 6 denotes a rotating shaft, which is rotatably supported by the bracket 2 via a bearing 7. A rotor core 8 is fitted and fixed to the rotary shaft 5 and has a field pole 9 made of a permanent magnet fixed to the outer peripheral portion.
The stator coil 5 is wound around the cylindrical portion 4a of the bobbin 4 and attached to the teeth portion 3b of the stator core 3. However, since the outer peripheral portion is exposed, the bracket 2 is used for insulation protection. Is provided with a gap g.
[0003]
[Problems to be solved by the invention]
However, in the prior art, since it is necessary to provide the gap g between the stator coil 5 and the bracket 2 as described above, there is a problem that the size of the rotating electrical machine is increased, and the dimensions in the same axial direction are present. In some cases, it is necessary to reduce the number of turns of the stator coil 5 in order to take the gap g, and there is a problem that the efficiency is deteriorated.
Therefore, an object of the present invention is to provide a small and efficient rotating electrical machine.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a bobbin comprising a cylindrical portion and flanges formed at both ends of the cylindrical portion, and a stator coil wound around the cylindrical portion, and a yoke portion and a tooth. In the rotating electrical machine formed by being inserted into the teeth portion of the stator core consisting of a portion, the bobbin is divided into a cylindrical portion and at least one flange portion, and at least the axial direction of the flange portion A coil cover is provided at the end.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
The overall configuration of the rotating electrical machine is the same as that of the conventional example of FIG. 1 and 2, the same reference numerals as those in FIGS. 3 and 4 indicate the same or corresponding parts.
FIG. 1 is a side sectional view showing a main part of a rotating electric machine according to a first embodiment of the present invention, and FIG.
The overall configuration of the bobbin 4 is substantially the same as the conventional example of FIGS. 3 and 4, but in the present invention, the bobbin 4 is divided into a cylindrical portion 4 a and one flange portion 4 b, and A coil cover 4c is provided at the axial end of the flange 4b.
The stator coil 5 is manufactured in advance as an air-core coil, and is inserted into the tubular portion 4a of the bobbin 4 in a state of being disassembled into the tubular portion 4a and the flange portion 4b. After the stator coil 5 is mounted, the flange 4b is coupled and fixed to the cylindrical portion 4a, and the coil cover 4c is placed on the outer periphery of the stator coil 5. In this way, the bobbin 4 around which the stator coil is wound is configured. Thereafter, the bobbin 4 is inserted into the tooth portion 3 a of the stator core 3.
Since the outer periphery of the stator coil 5 wound around the bobbin 4 is insulated and protected by the coil cover 4c, the bobbin 4 can be brought into close contact with the bracket 2, and the gap between the bobbin 4 and the bracket 2 Can be eliminated. Thereby, the axial direction length of a rotary electric machine becomes short compared with the past.
Further, by bringing the bobbin 4 into close contact with the bracket 2, part of the heat generated from the stator coil 5 can be effectively transmitted to the bracket and radiated to the outside air, thereby improving the cooling performance of the rotating electrical machine. When the axial dimension of the rotating electrical machine is the same as that of the prior art, the amount of winding of the stator coil can be increased, and the efficiency of the rotating electrical machine can be improved.
In addition, since the stator coil is an air-core coil that is tightly wound in advance, even when the coil part is molded with resin, it prevents the coil from collapsing and deforming against the casting pressure of the resin mold. Can do.
FIG. 3 is a perspective view showing a second embodiment of the present invention, and shows a case where the present invention is applied to an electric motor for performing interphase connection of the stator coil 5 using the printed circuit board 10.
In this case, the coil end 5a of the stator coil 5 is passed through the through hole 10a of the printed circuit board 10, and the printed circuit board 10 is brought into close contact with the coil cover 4c. In this state, the coil end 5a is attached to the printed circuit board 10. Solder.
By using the coil cover 4c as a pedestal, the printed circuit board 10 can be stably fixed in place.
In the present invention, the coil cover 4c may also be provided at the circumferential end of the bobbin 4 to further enhance the insulation protection of the stator coil 5.
[0006]
【The invention's effect】
As described above, the present invention has the following effects.
(1) Since a coil cover is attached to the outer periphery of the stator coil for insulation protection, there is no need to leave a gap between the stator coil and the bracket, and the length of the rotating electrical machine can be shortened. Can be small.
(2) Since the coil cover can be brought into contact with the bracket, part of the heat generated by the stator coil can be effectively transmitted to the bracket and radiated to the outside air, thereby improving the cooling performance of the rotating electrical machine.
(3) When the rotating electrical machine has the same dimensions as the conventional one, the winding amount of the stator coil can be increased, and the efficiency of the rotating electrical machine can be improved.
(4) Since the bobbin is divided into a cylindrical part and a flange part, the stator coil can be an air-core coil in which the coil is firmly wound beforehand, and the coil part is made of resin. Even in the case of molding, the coil can be prevented from collapsing and deforming against the casting pressure of the resin mold.
(5) In the case of an electric motor that uses a printed circuit board to connect the stator coils to each other, if the printed circuit board is used as a base for the coil cover, the printed circuit board can be stably fixed in place.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a main part of a rotating electrical machine according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing the relationship between the configuration of the bobbin and the stator coil in the first embodiment of the present invention.
FIG. 3 is a perspective view showing a second embodiment of the present invention, and shows a case where the present invention is applied to an electric motor for performing interphase connection of stator coils using a printed circuit board.
FIG. 4 is a side sectional view showing a main part of a rotating electrical machine according to a conventional technique.
FIG. 5 is a perspective view showing a bobbin in a state in which a stator coil is wound in the prior art.
[Explanation of symbols]
1 frame,
2 brackets,
3 Stator core,
3a Yoke part,
3b Teeth club,
4 bobbins,
4a cylindrical part,
4b
4c coil cover,
5 Stator coil,
5a coil end,
6 rotation axis,
7 bearings,
8 Rotor core,
9 Field pole,
10 Printed circuit board,
10a Through hole

Claims (1)

筒状部と、この筒状部の両端に形成した鍔部とからなり、前記筒状部に固定子コイルを巻装したボビンを、ヨーク部とティース部からなる固定子鉄心の前記ティース部に挿着してなる回転電機において、
前記ボビンを、筒状部と、少なくとも一方の鍔部とに分割して構成するとともに、前記鍔部の少なくとも軸方向端部に、コイルカバーを設けたことを特徴とする回転電機。
A bobbin comprising a cylindrical part and flanges formed at both ends of the cylindrical part, and a stator coil wound around the cylindrical part, is attached to the teeth part of the stator core consisting of a yoke part and a tooth part. In the rotating electric machine that is inserted,
A rotating electric machine characterized in that the bobbin is divided into a cylindrical part and at least one flange part, and a coil cover is provided at at least an axial end of the flange part.
JP24042697A 1997-08-20 1997-08-20 Rotating electric machine Expired - Fee Related JP3777741B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24042697A JP3777741B2 (en) 1997-08-20 1997-08-20 Rotating electric machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24042697A JP3777741B2 (en) 1997-08-20 1997-08-20 Rotating electric machine

Publications (2)

Publication Number Publication Date
JPH1169689A JPH1169689A (en) 1999-03-09
JP3777741B2 true JP3777741B2 (en) 2006-05-24

Family

ID=17059315

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24042697A Expired - Fee Related JP3777741B2 (en) 1997-08-20 1997-08-20 Rotating electric machine

Country Status (1)

Country Link
JP (1) JP3777741B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4665454B2 (en) * 2004-08-06 2011-04-06 株式会社安川電機 motor

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