JP3714146B2 - Stator core with resin insulation layer for generators for internal combustion engines - Google Patents

Stator core with resin insulation layer for generators for internal combustion engines Download PDF

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Publication number
JP3714146B2
JP3714146B2 JP2000319370A JP2000319370A JP3714146B2 JP 3714146 B2 JP3714146 B2 JP 3714146B2 JP 2000319370 A JP2000319370 A JP 2000319370A JP 2000319370 A JP2000319370 A JP 2000319370A JP 3714146 B2 JP3714146 B2 JP 3714146B2
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Prior art keywords
pole
resin layer
internal combustion
stator core
receding
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JP2000319370A
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JP2002136020A (en
Inventor
茂 ▲高▼木
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Kokusan Denki Co Ltd
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Kokusan Denki Co Ltd
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  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、内燃機関により回転子が回転して固定子の発電コイルが発電を行なう内燃機関用発電機の樹脂絶縁層付き固定子鉄心に関するものである。
【０００２】
【従来の技術】
従来のこの種の内燃機関用発電機の樹脂絶縁層付き固定子鉄心は、図３及び図４に示すように、複数枚の磁性金属板１が積層されて、環状部２とその外周端部に放射状に突設された複数のポール部３とを有する部分が形成されると共に、所要のポール部３で各磁性金属板１がレーザ溶接されてその溶接部４により連結されて構成されている積層鉄心５と、少なくとも各ポール部３の外周で発電コイルの巻装部分に被覆された絶縁樹脂層６とを備えた構造であった。この場合、絶縁樹脂層６は、ポール部３の先端での溶接部４の形成後に、被覆作業の容易さから、環状部２の外周側部分と各ポール部３の外周部分以外に、各ポール部３の先端面にも被覆していた。このような被覆作業の後に、図示しない回転子の内周の永久磁石に対して所要のギャップが存在するように切削して、各ポール部３の先端面を露出させていた。
【０００３】
【発明が解決しようとする課題】
しかしながら、このような構造の内燃機関用発電機の樹脂絶縁層付き固定子鉄心では、積層鉄心５を所要（例えば、４箇所）のポール部３でレーザ溶接して各磁性金属板１の連結をしているが、各磁性金属板１の連結力が十分に得られない問題点があった。
【０００４】
また、各ポール部３の先端面の切削加工時に、磁性金属板１が反って隙間が発生したり、溶接深さが浅い箇所で溶接部４が除去されて、各磁性金属板１の連結力が低下する問題点があった。
【０００５】
本発明の目的は、各ポール部での各磁性金属板の連結力を向上できる内燃機関用発電機の樹脂絶縁層付き固定子鉄心を提供することにある。
【０００６】
【課題を解決するための手段】
本発明は、複数枚の磁性金属板が積層され、端部には複数のポール部が突設されると共に所要のポール部で各磁性金属板が溶接されて連結されている積層鉄心と、少なくとも各ポール部の外周で発電コイルの巻装部分に被覆された絶縁樹脂層とを備えた内燃機関用発電機の樹脂絶縁層付き固定子鉄心を改良するものである。
【０００７】
本発明に係る内燃機関用発電機の樹脂絶縁層付き固定子鉄心においては、各ポール部の先端にはその中央部を除いた周方向の両側の部分に基準外径より後退した後退部がそれぞれ設けられ、各後退部は絶縁樹脂層で覆われていることを特徴とする。
【０００８】
また、本発明に係る内燃機関用発電機の樹脂絶縁層付き固定子鉄心においては、各ポール部の先端にはその中央部を除いた周方向の両側の部分に基準外径より後退した後退部がそれぞれ設けられ、各後退部は絶縁樹脂層に連なった絶縁樹脂層で覆われていることを特徴とする。
【０００９】
このように各ポール部の周方向の両側を絶縁樹脂層で覆うと、各ポール部での各磁性金属板の連結力を向上させることができる。特に、各ポール部の先端にはその中央部を除いた周方向の両側の部分に基準外径より後退した後退部をそれぞれ設け、これらの後退部に絶縁樹脂層を設けているので、各ポール部の先端に絶縁樹脂層が存在しても、その部分が基準外径を超えることがなく、回転子が接触することはない。また、各ポール部の先端を一定外径に揃える切削作業をしても、この絶縁樹脂層が除去されることはない。さらに、各ポール部の先端の後退部の絶縁樹脂層が発電コイルの巻装部分の絶縁樹脂層に連なっていると、後退部の絶縁樹脂層の機械的強度を高めることができる。
【００１０】
【発明の実施の形態】
図１及び図２は本発明に係る内燃機関用発電機の樹脂絶縁層付き固定子鉄心における実施の形態の一例を示したもので、図１は本例の内燃機関用発電機の樹脂絶縁層付き固定子鉄心の要部破断平面図、図２は図１の１つのポール部の端面図である。
【００１１】
本例の内燃機関用発電機の樹脂絶縁層付き固定子鉄心においては、複数枚の磁性金属板１が積層されて、環状部２とその外周端部に放射状に突設された複数のポール部３とを有する部分が形成されると共に、各ポール部３の先端にはその中央部を除いた周方向の両側の部分に基準外径より後退した後退部７がそれぞれ設けられ、所要のポール部３で各磁性金属板１がレーザ溶接されてその溶接部４により連結されて積層鉄心５が構成されている。少なくとも各ポール部３の外周で発電コイルの巻装部分と各後退部７には、絶縁樹脂層６が被覆されている。この場合、絶縁樹脂層６は、ポール部３の先端での溶接部４の形成後に、被覆作業の容易さから、環状部２の外周側部分と各ポール部３の外周部分以外に、各後退部７を含めた各ポール部３の先端面にも被覆されている。このような被覆作業の後に、図示しない回転子の内周の永久磁石に対して所要のギャップが存在するように、各ポール部３の先端部が基準外径まで切削され、各ポール部３の先端部で周方向の中央部を図示のように露出させる。
【００１２】
このように各ポール部３の周方向の両側を絶縁樹脂層６で覆うと、各ポール部３での各磁性金属板１の連結力を向上させることができる。特に、各ポール部３の先端にはその中央部を除いた周方向の両側の部分に基準外径より後退した後退部７をそれぞれ設け、これらの後退部７に絶縁樹脂層６を設けているので、各ポール部３の先端に絶縁樹脂層６が存在しても、その部分が基準外径を超えることがなく、回転子が接触することはない。また、各ポール部３の先端を一定外径に揃える切削作業をしても、この絶縁樹脂層６が除去されることはない。また、後退部７に対する絶縁樹脂層６の形成は、発電コイルの巻装部分の絶縁樹脂層６の形成時に同時に行なうことができ、樹脂被覆工程の追加はない。さらに、各ポール部３の先端の後退部７の絶縁樹脂層６が発電コイルの巻装部分の絶縁樹脂層６に連なっているので、後退部７の絶縁樹脂層６の機械的強度を高めることができる。
【００１３】
なお、絶縁樹脂層６の被覆時に、各ポール部３の先端で周方向の先端にマスキング治具を当てて絶縁樹脂層６が最初から被覆されないようにすることもできる。
【００１４】
また、溶接部４を設ける箇所は、図示のような各ポール部３の先端の周方向の中央に限定されるものではなく、各ポール部３の先端であれば幅方向のいずれの箇所であってもよい。
【００１５】
【発明の効果】
本発明に係る内燃機関用発電機の樹脂絶縁層付き固定子鉄心においては、各ポール部の先端にはその中央部を除いた周方向の両側の部分に基準外径より後退した後退部をそれぞれ設け、各後退部を絶縁樹脂層で覆うか、または各後退部をコイル巻装部分の絶縁樹脂層に連なった絶縁樹脂層で覆ったので、各ポール部での各磁性金属板の連結力を向上させることができる。特に、各ポール部の先端にその中央部を除いた周方向の両側の部分に基準外径より後退した後退部をそれぞれ設け、これらの後退部に絶縁樹脂層を設けているので、各ポール部の先端に絶縁樹脂層が存在しても、その部分が基準外径を超えることがなく、回転子が接触することはない。また、各ポール部の先端を一定外径に揃える切削作業をしても、この絶縁樹脂層が除去されることはない。また、後退部に対する絶縁樹脂層の形成は、発電コイルの巻装部分の絶縁樹脂層の形成時に同時に行なうことができ、樹脂被覆工程の追加はない。さらに、各ポール部の先端の後退部の絶縁樹脂層が発電コイルの巻装部分の絶縁樹脂層に連なっていると、後退部の絶縁樹脂層の機械的強度を高めることができる。
【図面の簡単な説明】
【図１】本発明に係る内燃機関用発電機の樹脂絶縁層付き固定子鉄心における実施の形態の一例を示した要部破断平面図である。
【図２】図１の１つのポール部の端面図である。
【図３】従来の内燃機関用発電機の樹脂絶縁層付き固定子鉄心の要部破断平面図である。
【図４】図３の１つのポール部の端面図である。
【符号の説明】
１ 磁性金属板
２ 環状部
３ ポール部
４ 溶接部
５ 積層鉄心
６ 絶縁樹脂層
７ 後退部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stator core with a resin insulation layer of a generator for an internal combustion engine in which a rotor is rotated by an internal combustion engine and a power generation coil of a stator generates power.
[0002]
[Prior art]
As shown in FIGS. 3 and 4, a conventional stator iron core with a resin insulation layer of this type of generator for an internal combustion engine is formed by laminating a plurality of magnetic metal plates 1 to form an annular portion 2 and an outer peripheral end portion thereof. A portion having a plurality of pole portions 3 projecting radially is formed, and each magnetic metal plate 1 is laser-welded at the required pole portion 3 and connected by the welded portion 4. The structure was provided with a laminated iron core 5 and an insulating resin layer 6 coated on the winding portion of the power generating coil at least at the outer periphery of each pole portion 3. In this case, after the formation of the welded portion 4 at the tip of the pole portion 3, the insulating resin layer 6 is formed on each pole other than the outer peripheral side portion of the annular portion 2 and the outer peripheral portion of each pole portion 3 for easy covering work. The tip surface of the part 3 was also covered. After such a covering operation, cutting was performed so that a required gap existed with respect to the permanent magnet on the inner periphery of the rotor (not shown) to expose the tip surface of each pole portion 3.
[0003]
[Problems to be solved by the invention]
However, in the stator core with a resin insulation layer of the generator for an internal combustion engine having such a structure, the laminated iron core 5 is laser-welded at the required pole portions 3 (for example, four locations) to connect the magnetic metal plates 1. However, there is a problem that the coupling force of each magnetic metal plate 1 cannot be obtained sufficiently.
[0004]
Further, when cutting the tip surface of each pole portion 3, the magnetic metal plate 1 is warped and a gap is generated, or the welded portion 4 is removed at a location where the welding depth is shallow, so that the coupling force of each magnetic metal plate 1 is reduced. There was a problem of lowering.
[0005]
An object of the present invention is to provide a stator core with a resin insulation layer of a generator for an internal combustion engine that can improve the coupling force of each magnetic metal plate at each pole portion.
[0006]
[Means for Solving the Problems]
The present invention comprises a laminated iron core in which a plurality of magnetic metal plates are laminated, and a plurality of pole portions project from the end portion and each magnetic metal plate is welded and connected at a required pole portion, and at least The stator iron core with a resin insulation layer of the generator for internal combustion engines provided with the insulation resin layer coat | covered by the winding part of the power generation coil in the outer periphery of each pole part is improved.
[0007]
In the stator core with a resin insulation layer of the generator for an internal combustion engine according to the present invention, at the tip of each pole portion, there are retreat portions retreated from the reference outer diameter on both sides in the circumferential direction excluding the center portion thereof. Provided, and each receding portion is covered with an insulating resin layer.
[0008]
Further, in the stator core with a resin insulation layer of the generator for an internal combustion engine according to the present invention, at the tip of each pole portion, a receding portion that recedes from the reference outer diameter at both sides in the circumferential direction excluding the central portion Are provided, and each receding portion is covered with an insulating resin layer connected to the insulating resin layer.
[0009]
Thus, if the both sides of each pole part of the circumferential direction are covered with an insulating resin layer, the connection force of each magnetic metal plate in each pole part can be improved. In particular, the tip of each pole part is provided with receding parts that recede from the reference outer diameter on both sides in the circumferential direction excluding the central part, and an insulating resin layer is provided on these receding parts. Even if there is an insulating resin layer at the tip of the part, the part does not exceed the reference outer diameter, and the rotor does not contact. Further, even if a cutting operation is performed in which the tips of the pole portions are arranged to have a constant outer diameter, the insulating resin layer is not removed. Furthermore, when the insulating resin layer at the retracted portion at the tip of each pole portion is connected to the insulating resin layer at the winding portion of the power generating coil, the mechanical strength of the insulating resin layer at the retracted portion can be increased.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show an example of an embodiment of a stator core with a resin insulation layer of a generator for an internal combustion engine according to the present invention, and FIG. 1 shows a resin insulation layer of the generator for an internal combustion engine of this example. FIG. 2 is an end view of one pole portion of FIG. 1.
[0011]
In the stator core with a resin insulation layer of the generator for an internal combustion engine of this example, a plurality of magnetic metal plates 1 are laminated, and a plurality of pole portions projecting radially from the annular portion 2 and its outer peripheral end. 3 are formed, and at the front end of each pole portion 3, a retreating portion 7 which is retreated from the reference outer diameter is provided on both sides in the circumferential direction excluding the central portion, and the required pole portion 3, each magnetic metal plate 1 is laser welded and connected by a welded portion 4 to form a laminated iron core 5. An insulating resin layer 6 is coated at least on the outer periphery of each pole portion 3 and on the winding portion of the power generation coil and each retreating portion 7. In this case, after the formation of the welded portion 4 at the tip of the pole portion 3, the insulating resin layer 6 is retreated in addition to the outer peripheral portion of the annular portion 2 and the outer peripheral portion of each pole portion 3 in order to facilitate the covering operation. The tip surface of each pole portion 3 including the portion 7 is also covered. After such a covering operation, the tip of each pole portion 3 is cut to the reference outer diameter so that a required gap exists with respect to the inner permanent magnet of the rotor (not shown). The central portion in the circumferential direction is exposed at the tip as shown in the figure.
[0012]
Thus, if the both sides of the circumferential direction of each pole part 3 are covered with the insulating resin layer 6, the connection force of each magnetic metal plate 1 in each pole part 3 can be improved. In particular, at the tip of each pole portion 3, a receding portion 7 that recedes from the reference outer diameter is provided on both sides in the circumferential direction excluding the central portion, and an insulating resin layer 6 is provided at these receding portions 7. Therefore, even if the insulating resin layer 6 exists at the tip of each pole portion 3, the portion does not exceed the reference outer diameter, and the rotor does not contact. Further, even if a cutting operation is performed in which the tips of the pole portions 3 are arranged to have a constant outer diameter, the insulating resin layer 6 is not removed. Moreover, the formation of the insulating resin layer 6 on the receding portion 7 can be performed simultaneously with the formation of the insulating resin layer 6 in the winding portion of the power generation coil, and there is no additional resin coating step. Furthermore, since the insulating resin layer 6 of the receding portion 7 at the tip of each pole portion 3 is connected to the insulating resin layer 6 of the winding portion of the power generating coil, the mechanical strength of the insulating resin layer 6 of the receding portion 7 is increased. Can do.
[0013]
In addition, when the insulating resin layer 6 is covered, a masking jig may be applied to the tip in the circumferential direction at the tip of each pole portion 3 so that the insulating resin layer 6 is not covered from the beginning.
[0014]
Further, the place where the welded portion 4 is provided is not limited to the center in the circumferential direction of the tip of each pole portion 3 as shown in the figure, and any location in the width direction as long as the tip of each pole portion 3 is provided. May be.
[0015]
【The invention's effect】
In the stator core with a resin insulation layer of the generator for an internal combustion engine according to the present invention, each pole portion has a receding portion that is receded from the reference outer diameter at both ends in the circumferential direction except the central portion thereof. Since each receding part is covered with an insulating resin layer, or each receding part is covered with an insulating resin layer connected to the insulating resin layer of the coil winding part, the coupling force of each magnetic metal plate at each pole part is Can be improved. In particular, each pole part is provided with a receding part that recedes from the reference outer diameter at both ends in the circumferential direction excluding its central part, and an insulating resin layer is provided at these receding parts. Even if there is an insulating resin layer at the tip of this, the portion does not exceed the reference outer diameter, and the rotor does not contact. Further, even if a cutting operation is performed in which the tips of the pole portions are arranged to have a constant outer diameter, the insulating resin layer is not removed. Moreover, the formation of the insulating resin layer on the receding portion can be performed simultaneously with the formation of the insulating resin layer in the winding portion of the power generating coil, and there is no additional resin coating step. Furthermore, when the insulating resin layer at the receding portion at the tip of each pole portion is connected to the insulating resin layer at the winding portion of the power generating coil, the mechanical strength of the insulating resin layer at the receding portion can be increased.
[Brief description of the drawings]
FIG. 1 is a fragmentary plan view showing an example of an embodiment of a stator core with a resin insulation layer of a generator for an internal combustion engine according to the present invention.
2 is an end view of one pole portion of FIG.
FIG. 3 is a fragmentary plan view of a main part of a stator core with a resin insulation layer of a conventional generator for an internal combustion engine.
4 is an end view of one pole portion of FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Magnetic metal plate 2 Annular part 3 Pole part 4 Welded part 5 Laminated core 6 Insulating resin layer 7 Retreat part

Claims (2)

複数枚の磁性金属板が積層され、端部には複数のポール部が突設されると共に所要の前記ポール部で前記各磁性金属板が溶接されて連結されている積層鉄心と、少なくとも前記各ポール部の外周で発電コイルの巻装部分を被覆する絶縁樹脂層とを備えた内燃機関用発電機の樹脂絶縁層付き固定子鉄心において、
前記各ポール部の先端にはその中央部を除いた周方向の両側の部分に基準外径より後退した後退部がそれぞれ設けられ、前記各後退部は絶縁樹脂層で覆われていることを特徴とする内燃機関用発電機の樹脂絶縁層付き固定子鉄心。A plurality of magnetic metal plates are laminated, and a plurality of pole portions project from the end portions, and the respective magnetic metal plates are welded and connected at the required pole portions, and at least the respective In the stator core with a resin insulation layer of the generator for an internal combustion engine provided with an insulation resin layer covering the winding portion of the power generation coil on the outer periphery of the pole portion,
Each pole portion is provided with a receding portion that is receded from a reference outer diameter at both ends in the circumferential direction except the central portion thereof, and each receding portion is covered with an insulating resin layer. A stator core with a resin insulation layer of a generator for an internal combustion engine. 複数枚の磁性金属板が積層され、端部には複数のポール部が突設されると共に所要の前記ポール部で前記各磁性金属板が溶接されて連結されている積層鉄心と、少なくとも前記各ポール部の外周で発電コイルの巻装部分を被覆する絶縁樹脂層とを備えた内燃機関用発電機の樹脂絶縁層付き固定子鉄心において、
前記各ポール部の先端にはその中央部を除いた周方向の両側の部分に基準外径より後退した後退部がそれぞれ設けられ、前記各後退部は前記発電コイルの巻装部分を被覆する絶縁樹脂層に連なった絶縁樹脂層で覆われていることを特徴とする内燃機関用発電機の樹脂絶縁層付き固定子鉄心。A plurality of magnetic metal plates are laminated, and a plurality of pole portions project from the end portions, and the respective magnetic metal plates are welded and connected at the required pole portions, and at least the respective In the stator core with a resin insulation layer of the generator for an internal combustion engine provided with an insulation resin layer covering the winding portion of the power generation coil on the outer periphery of the pole portion,
At the tip of each pole part, there are provided receding parts that recede from the reference outer diameter on both sides in the circumferential direction excluding the central part, and each receding part is an insulating covering the winding part of the power generating coil. A stator core with a resin insulation layer of a generator for an internal combustion engine, which is covered with an insulation resin layer connected to the resin layer.
JP2000319370A 2000-10-19 2000-10-19 Stator core with resin insulation layer for generators for internal combustion engines Expired - Fee Related JP3714146B2 (en)

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