JP6064924B2 - Method for producing neutral point connecting member - Google Patents

Method for producing neutral point connecting member Download PDF

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JP6064924B2
JP6064924B2 JP2014019120A JP2014019120A JP6064924B2 JP 6064924 B2 JP6064924 B2 JP 6064924B2 JP 2014019120 A JP2014019120 A JP 2014019120A JP 2014019120 A JP2014019120 A JP 2014019120A JP 6064924 B2 JP6064924 B2 JP 6064924B2
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peeling
neutral point
length
peeled
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JP2015146703A (en
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哲志 水谷
哲志 水谷
金重　慶一
慶一 金重
雅志 松本
雅志 松本
小池　昭仁
昭仁 小池
正幸 池本
正幸 池本
勤 畠山
勤 畠山
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Toyota Motor Corp
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Description

本発明は、三相回転電機のコイルにおける中性点接続部材の製造方法に関する。   The present invention relates to a method for manufacturing a neutral point connecting member in a coil of a three-phase rotating electrical machine.

三相回転電機のＹ結線方式と呼ばれる巻線方法では、Ｕ相コイル、Ｖ相コイル、Ｗ相コイルのそれぞれの一方側端子は、Ｕ相端子、Ｖ相端子、Ｗ相端子となり、それぞれの他方側端子は相互結線されて中性点となる。３つの他方側端子を相互結線するために中性点接続部材が用いられる。   In the winding method called the Y-connection method of the three-phase rotating electrical machine, one side terminals of the U-phase coil, V-phase coil, and W-phase coil are the U-phase terminal, V-phase terminal, and W-phase terminal, respectively, The side terminals are connected to each other to become neutral points. A neutral point connecting member is used to interconnect the three other terminals.

特許文献１には、ＵＶ相中性点接続部材とＷ相中性点接続部材の２つの接続部材が別々に用いられて、この２つの部材が互いに接続される構成が開示されている。   Patent Document 1 discloses a configuration in which two connecting members, a UV-phase neutral point connecting member and a W-phase neutral point connecting member, are used separately and the two members are connected to each other.

特開２０１３−２１９９１３号公報JP 2013-219913 A

特許文献１では、中性点を形成するために２つの接続部材が用いられる。これを１つの接続部材で形成できれば便利でコストダウンにもなる。   In Patent Document 1, two connecting members are used to form a neutral point. If this can be formed with one connecting member, it is convenient and the cost is reduced.

本発明の目的は、１つの部材で構成できる中性点接続部材の製造方法を提供することである。   The objective of this invention is providing the manufacturing method of the neutral point connection member which can be comprised by one member.

本発明に係る中性点接続部材の製造方法は、絶縁皮膜付き導線の軸線方向に沿った所定間隔毎に、所定剥離長さで絶縁皮膜を順次剥離して複数の剥離部を有する部分的剥離導線を形成する工程と、複数の剥離部を有する部分的剥離導線の軸線方向に沿って１つおきの剥離部において所定剥離長さの半分の長さとなる位置で順次切断を行い、所定剥離長さの第１剥離部を中央部に有し、所定剥離長さの半分の長さの第２剥離部を両端部に有する中性点接続用導線を形成する工程と、中性点接続用導線を所定の折り曲げ方法で成形し、第１剥離部を所定剥離長さの半分の長さの位置で折り返して中央部接合部とし、２つの第２剥離部を中央部接合部から所定の位置関係で折り曲げ配置して２つの端部接合部として中性点接続部材を形成する成形工程と、を含むことを特徴とする。   The method for manufacturing a neutral point connecting member according to the present invention includes a partial peeling having a plurality of peeling portions by sequentially peeling an insulating film at a predetermined peeling length at predetermined intervals along an axial direction of a conductor with an insulating film. A step of forming a conducting wire and cutting in order at half the length of the predetermined peeling length at every other peeling portion along the axial direction of the partially peeled conducting wire having a plurality of peeling portions, and a predetermined peeling length A step of forming a neutral point connecting conductor having a first peeling portion at the center and a second peeling portion having a half length of a predetermined peeling length at both ends, and a neutral point connecting lead Is formed by a predetermined folding method, and the first peeling portion is folded back at a position half the predetermined peeling length to form a central joint portion, and the two second peeling portions are in a predetermined positional relationship from the central joint portion. Forming a neutral point connecting member as two end joints Characterized in that it comprises a and.

上記構成によれば、１つの部材で中性点接続部材を製造できる。   According to the said structure, a neutral point connection member can be manufactured with one member.

本発明に係る実施の形態の中性点接続部材の製造方法で製造された中性点接続部材を示す図である。（ａ）は、中性点接続部材が用いられる回転電機ステータを示し、（ｂ）は、温度センサ付きの中性点接続部材を示し、（ｃ）は、中性点接続部材１２のみを示す図である。It is a figure which shows the neutral point connection member manufactured with the manufacturing method of the neutral point connection member of embodiment which concerns on this invention. (A) shows a rotating electrical machine stator in which a neutral point connecting member is used, (b) shows a neutral point connecting member with a temperature sensor, and (c) shows only the neutral point connecting member 12. FIG. 本発明に係る実施の形態の中性点接続部材の製造方法の各手順を示す図である。It is a figure which shows each procedure of the manufacturing method of the neutral point connection member of embodiment which concerns on this invention.

以下に図面を用いて本発明に係る実施の形態につき、詳細に説明する。以下で述べる寸法、形状、材質等は説明のための例示であって、中性点接続部材の仕様に応じ適宜変更が可能である。以下では、全ての図面において同様の要素には同一の符号を付し、重複する説明を省略する。   Embodiments according to the present invention will be described below in detail with reference to the drawings. The dimensions, shapes, materials, and the like described below are examples for explanation, and can be appropriately changed according to the specification of the neutral point connecting member. Below, the same code | symbol is attached | subjected to the same element in all the drawings, and the overlapping description is abbreviate | omitted.

図１は、回転電機ステータ１０に設けられる中性点接続部材１２を示す図である。（ａ）は、回転電機ステータ１０における中性点接続部材１２の配置を示す図で、（ｂ）は温度センサ２０付きの中性点接続部材１２を示す図で、（ｃ）は温度センサ２０を省略して中性点接続部材１２のみを示す図である。   FIG. 1 is a view showing a neutral point connecting member 12 provided in the rotating electrical machine stator 10. (A) is a figure which shows arrangement | positioning of the neutral point connection member 12 in the rotary electric machine stator 10, (b) is a figure which shows the neutral point connection member 12 with the temperature sensor 20, (c) is the temperature sensor 20. It is a figure which abbreviate | omits and shows only the neutral point connection member 12. FIG.

回転電機ステータ１０は、三相同期型回転電機に用いられる固定子であって、ステータコアに各相コイルであるＵ相コイル、Ｖ相コイル、Ｗ相コイルがそれぞれ分布巻で巻回される。Ｕ相コイルとＶ相コイルとＷ相コイルはＹ結線方式で結線され、それぞれの一方側端子は駆動回路に接続されるが、それぞれの他方側端子は中性点で相互接続される。Ｕ相コイル、Ｖ相コイル、Ｗ相コイルには、断面が矩形形状を有する平角線の絶縁皮膜付き導線が用いられる。平角線を用いることで、ステータ１０において各相コイルが挿入されるスロット内のコイル占積率の向上を図ることができる。   The rotating electrical machine stator 10 is a stator used in a three-phase synchronous rotating electrical machine, and a U-phase coil, a V-phase coil, and a W-phase coil that are each phase coil are wound around the stator core in distributed winding. The U-phase coil, the V-phase coil, and the W-phase coil are connected by the Y-connection method, and each one side terminal is connected to the drive circuit, but each other side terminal is mutually connected at a neutral point. For the U-phase coil, V-phase coil, and W-phase coil, a flat wire with an insulating film having a rectangular cross section is used. By using the rectangular wire, the coil space factor in the slot in which each phase coil is inserted in the stator 10 can be improved.

図１（ｃ）に示すように、中性点接続部材１２は、１本の絶縁皮膜付き導線を用い、所定の３箇所の絶縁皮膜を剥離し、折り返し２４，２６を含む折り曲げによって、３箇所の絶縁皮膜が剥離されたところが突き出るようにし、それぞれをＵ相接続部１４、Ｖ相接続部１６、Ｗ相接続部１８としたものである。Ｕ相接続部１４はＵ相コイルの他方側端子に、Ｖ相接続部１６はＶ相コイルの他方側端子に、Ｗ相接続部１８はＷ相コイルの他方側端子に、それぞれ溶接等で接合される。   As shown in FIG. 1 (c), the neutral point connecting member 12 uses a single conductive wire with an insulating film, peels off three predetermined insulating films, and bends three parts by folding including the folds 24 and 26. The portions from which the insulating films were peeled out protruded, and the U-phase connection portion 14, the V-phase connection portion 16, and the W-phase connection portion 18 are respectively formed. The U-phase connection portion 14 is joined to the other terminal of the U-phase coil, the V-phase connection portion 16 is joined to the other-side terminal of the V-phase coil, and the W-phase connection portion 18 is joined to the other-side terminal of the W-phase coil by welding or the like. Is done.

図１（ａ），（ｂ）には、中性点接続部材１２の構成要素ではないが、温度センサ２０と、温度センサ２０から引き出される信号線に接続されたコネクタ２２が図示される。温度センサ２０は、折り返し２６の隙間にサーミスタを挟み込み、これを樹脂モールド等で固定したものである。温度センサ２０は、中性点接続部材１２の温度を検出するもので、その検出温度から、ステータのコイル温度を推定することができる。図１の例では、温度センサ２０に近い接続部をＷ相接続部１８としたが、これ以外の接続部としてもよい。   FIGS. 1A and 1B show a temperature sensor 20 and a connector 22 connected to a signal line drawn from the temperature sensor 20, although they are not constituent elements of the neutral point connecting member 12. The temperature sensor 20 is a sensor in which a thermistor is sandwiched between gaps 26 and fixed with a resin mold or the like. The temperature sensor 20 detects the temperature of the neutral point connection member 12, and can estimate the coil temperature of the stator from the detected temperature. In the example of FIG. 1, the connection portion close to the temperature sensor 20 is the W-phase connection portion 18, but other connection portions may be used.

図２は、中性点接続部材１２の製造方法の手順を示す図である。最初の手順は、図２（ａ）に示されるように、絶縁皮膜付き導線を準備する工程である。ここでは、ボビン３０から絶縁皮膜付き導線３２が引き出され、真直ぐに延ばされる。   FIG. 2 is a diagram illustrating a procedure of a method for manufacturing the neutral point connection member 12. The first procedure is a step of preparing a conductor with an insulating film as shown in FIG. Here, the lead wire 32 with an insulating film is drawn out from the bobbin 30 and is straightened.

絶縁皮膜付き導線３２は、ステータ１０の各相コイルに用いられる絶縁皮膜付き導線と同じもので、Ａ−Ａ断面として示されるように、断面が矩形形状の平角線で、芯線３４が絶縁皮膜３５で覆われた導線である。なお、場合によって、平角線に代えて、断面が円形、楕円形のものを用いてもよい。図２では、芯線３４と絶縁皮膜３５の区別が分かるように、絶縁皮膜付き導線３２において、表面が絶縁皮膜３５で覆われる部分に交叉斜線を付し、絶縁皮膜３５が剥離されて表面に芯線３４が露出する部分には交叉斜線を付してない。   The conductive wire with insulation film 32 is the same as the conductive wire with insulation film used for each phase coil of the stator 10, and is a rectangular wire with a rectangular cross section and a core wire 34 with an insulation film 35 as shown in the AA cross section. It is a conducting wire covered with. In some cases, a rectangular or elliptical cross section may be used instead of the flat wire. In FIG. 2, in order to understand the distinction between the core wire 34 and the insulating film 35, in the conductive wire 32 with the insulating film, a cross-hatched line is given to a portion where the surface is covered with the insulating film 35, and the insulating film 35 is peeled off to expose the core wire on the surface. The portion where 34 is exposed is not cross-hatched.

芯線３４は、電気伝導度のよい金属線が用いられる。例えば、銅線を芯線３４として用いることができる。絶縁皮膜３５は、絶縁皮膜付き導線３２において芯線３４の外周側を被覆する電気絶縁性の皮膜である。絶縁皮膜３５の材料としては、ポリイミド（ＰＡ）樹脂、ポリアミドイミド（ＰＡＩ）樹脂等を用いることができる。   The core wire 34 is a metal wire with good electrical conductivity. For example, a copper wire can be used as the core wire 34. The insulating film 35 is an electrically insulating film that covers the outer peripheral side of the core wire 34 in the conducting wire 32 with the insulating film. As a material of the insulating film 35, polyimide (PA) resin, polyamideimide (PAI) resin, or the like can be used.

ボビン３０から絶縁皮膜付き導線３２が引き出されて真直ぐにされると、次に、図２（ｂ）に示されるように、その状態で絶縁皮膜３５の部分的剥離が行われる。絶縁皮膜３５の部分的剥離には、剥離装置３６が用いられる。剥離装置３６は、絶縁皮膜付き導線３２の軸線方向、つまり長手方向に沿って、予め定めた所定間隔毎に、予め定めた所定剥離長さで、絶縁皮膜３５を順次剥離する。剥離は、所定形状の刃具を用いて機械的に絶縁皮膜３５を剥がすことで行われる。これに代えて、絶縁皮膜３５を溶解または焼失させることができる温度に加熱して行うものとしてもよい。   When the conductive wire 32 with the insulating film is drawn out from the bobbin 30 and straightened, next, as shown in FIG. 2B, the insulating film 35 is partially peeled in that state. A peeling device 36 is used for partial peeling of the insulating film 35. The peeling device 36 sequentially peels the insulating film 35 with a predetermined peeling length at predetermined intervals along the axial direction of the conductive wire 32 with an insulating film, that is, the longitudinal direction. Peeling is performed by mechanically peeling the insulating film 35 using a blade having a predetermined shape. Instead of this, the insulating film 35 may be heated to a temperature at which it can be dissolved or burned out.

剥離装置３６によって、絶縁皮膜付き導線３２は、軸線方向に沿って絶縁皮膜３５が周期的に剥離された部分的剥離導線４０となる。図２（ｂ）の例では、部分的剥離導線４０は、絶縁皮膜３５が残される長さＬ0の絶縁部４２と、絶縁皮膜３５が剥離された長さ２Ｌ1の剥離部４４とが交互に配置される。剥離部４４の長さを２Ｌ1としたのは、次の切断工程で剥離部４４が半分に切断されるからである。 By the peeling device 36, the conductive wire 32 with the insulating film becomes a partially peeled conductive wire 40 in which the insulating film 35 is periodically peeled along the axial direction. In the example of FIG. 2B, the partially peeled conductive wire 40 has alternating length L 0 insulating portions 42 where the insulating coating 35 is left and length 2L 1 peeling portions 44 where the insulating coating 35 is peeled off. Placed in. The reason why the length of the peeling portion 44 is set to 2L 1 is that the peeling portion 44 is cut in half in the next cutting step.

このように、剥離装置３６によって、絶縁皮膜付き導線３２は、その軸線方向に沿った所定間隔毎に、所定剥離長さで絶縁皮膜３５が順次剥離されて、複数の剥離部４４を有する部分的剥離導線４０となる。図２（ｂ）の例では、所定剥離長さが２Ｌ1で、所定間隔は（Ｌ0＋２Ｌ1）である。２Ｌ1、（Ｌ0＋２Ｌ1）は一定値であるので、１台の剥離装置３６で、長い１本の連続する絶縁皮膜付き導線３２について所定剥離長さの幅で部分的剥離を繰り返し行うことで、１本の連続した部分的剥離導線４０を作ることができる。 As described above, the insulating film 35 is partially peeled off at predetermined intervals along the axial direction by the peeling device 36 so that the insulating film 35 is sequentially peeled off at a predetermined peeling length. It becomes the peeling conducting wire 40. In the example of FIG. 2B, the predetermined peeling length is 2L 1 and the predetermined interval is (L 0 + 2L 1 ). Since 2L 1 and (L 0 + 2L 1 ) are constant values, partial stripping is repeatedly performed with a width of a predetermined stripping length on one long continuous conductive film 32 with an insulating film by one stripping device 36. Thus, one continuous partially peeled conductor 40 can be made.

１本の連続した部分的剥離導線４０が形成されると、次に、図２（ｃ）に示されるように、切断装置４６によって、一定間隔で切断が行われ、中性点接続用導線５０が形成される。切断装置４６は、適当な切刃工具を有し、切刃工具を部分的剥離導線４０の所定の位置に押圧して切断する装置である。切断は、部分的剥離導線４０において、軸線方向に沿って１つおきの剥離部４４について、剥離長さ２Ｌ1の半分の長さＬ1となる位置を切断位置として、順次行われる。図２（ｃ）に、部分的剥離導線４０における切断位置を一点鎖線で示した。切断によって、絶縁皮膜３５が剥離された部分は、剥離長さ２Ｌ1を有するものと、剥離長さＬ1を有するものとの２種類になる。この２つを区別して、剥離長さ２Ｌ1を有するものを、図２（ｂ）の剥離部４４と同じ符号を用いて第１剥離部４４とし、剥離長さＬ1を有するものを第２剥離部４３，４５と呼ぶ。 When one continuous partially peeled conductive wire 40 is formed, next, as shown in FIG. 2C, cutting is performed at regular intervals by the cutting device 46, and the neutral point connecting conductive wire 50 is formed. Is formed. The cutting device 46 is a device that has an appropriate cutting tool and cuts the cutting tool by pressing the cutting tool to a predetermined position of the partial peeling lead 40. Cutting, in a partially peeled wire 40, the axial direction every other peeling unit 44 along, as the cutting position the position where the length L 1 of the half of the peel length 2L 1, are sequentially performed. In FIG. 2C, the cutting position in the partially peeled conductive wire 40 is indicated by a one-dot chain line. The part from which the insulating film 35 is peeled off by cutting is of two types, one having a peel length 2L 1 and one having a peel length L 1 . By distinguishing the two, the one having the peel length 2L 1 is designated as the first peel portion 44 by using the same reference numeral as the peel portion 44 in FIG. 2B, and the one having the peel length L 1 is the second. It is called peeling parts 43 and 45.

切断が行われて、部分的剥離導線４０から分離したものは、図２（ｄ）に示されるように、軸線に沿って、長さＬ1の第２剥離部４３、長さＬ0の絶縁部４２、長さ２Ｌ1の第１剥離部４４、長さＬ0の絶縁部４２、長さＬ1の第２剥離部４５が順次配置され、（Ｌ1＋Ｌ0＋２Ｌ1＋Ｌ0＋Ｌ1）＝（２Ｌ0＋４Ｌ1）の全長を有する。これが中性点接続用導線５０となる。切断は、部分的剥離導線４０の軸線方向に沿って、この（２Ｌ0＋４Ｌ1）の間隔で行われる。（２Ｌ0＋４Ｌ1）は一定値であるので、１台の切断装置４６で、長い１本の連続する部分的剥離導線４０を所定間隔で切断する処理を繰り返し行うことで、複数の中性点接続用導線５０を連続的に作り出すことができる。 Cutting is performed, those isolated from partial peeling lead 40, as shown in FIG. 2 (d), along the axis, the second peeling section 43 of length L 1, the insulation length L 0 part 42, the first peeling section 44 of length 2L 1, the insulating portion 42 of a length L 0, are sequentially arranged second release portion 45 of length L 1, (L 1 + L 0 + 2L 1 + L 0 + L 1) = (2L 0 + 4L 1 ). This is the neutral point connecting wire 50. Cutting is performed at the interval of (2L 0 + 4L 1 ) along the axial direction of the partially peeled conductive wire 40. Since (2L 0 + 4L 1 ) is a constant value, a plurality of neutral points can be obtained by repeatedly performing a process of cutting one long continuous partial peeling conductor 40 at a predetermined interval with one cutting device 46. The connecting wire 50 can be created continuously.

図２（ｄ）に示すように、１本の中性点接続用導線５０は、所定の剥離長さ２Ｌ1の第１剥離部４４を中央部に有し、所定の剥離長さ２Ｌ1の半分の長さＬ1を有する第２剥離部４３，４５を両端部に有し、第１剥離部４４と第２剥離部４３，４５の間にそれぞれ絶縁部４２を有する。 As shown in FIG. 2 (d), 1 pieces of neutral point connection wire 50 has a first release portion 44 of a predetermined stripping length 2L 1 in the center, with a predetermined peeling length 2L 1 The second peeling portions 43 and 45 having a half length L 1 are provided at both ends, and the insulating portions 42 are provided between the first peeling portion 44 and the second peeling portions 43 and 45, respectively.

次に、図２（ｅ）に示されるように、中性点接続用導線５０の折り曲げ成形が行われる。折り曲げ成形は、第１剥離部４４について、所定の剥離長さ２Ｌ1の半分の長さの位置で折り返し２４を形成して中央部接合部５４とする。また、両端部の第２剥離部４３，４５について、温度センサ２０のための折り返し２６を形成しながら、中央部接合部５４から所定の位置関係で折り曲げ配置して２つの端部接合部５６，５８とする。このようにして、中性点接続部材１２の形成が行われる。 Next, as shown in FIG. 2 (e), the neutral point connecting lead wire 50 is bent. In the bending molding, the first peeling portion 44 is formed with a fold 24 at a position that is half the predetermined peeling length 2L 1 to form a central joint 54. Further, the second peeling portions 43 and 45 at both end portions are folded and arranged in a predetermined positional relationship from the central joint portion 54 while forming the turn-up 26 for the temperature sensor 20, and the two end joint portions 56, 58. In this way, the neutral point connection member 12 is formed.

中央部接合部５４と２つの端部接合部５６，５８の間の所定位置関係は、中央部接合部５４と端部接合部５６の間の位置関係がステータ１０におけるＵ相コイルの他方側端子とＶ相コイルの他方側端子との位置関係となるように、中央部接合部５４と端部接合部５８の間の位置関係がステータ１０におけるＵ相コイルの他方側端子とＷ相コイルの他方側端子との位置関係となるように設定される。これにより、中央部接合部５４は、中性点接続部材のＵ相接続部１４となり、端部接合部５６は、中性点接続部材のＶ相接続部１６となり、端部接合部５８は、中性点接続部材のＷ相接続部１８となる。   The predetermined positional relationship between the central joint 54 and the two end joints 56 and 58 is such that the positional relationship between the central joint 54 and the end joint 56 is the other terminal of the U-phase coil in the stator 10. And the other terminal of the W-phase coil and the other terminal of the W-phase coil in the stator 10 so that the positional relationship between the center joint 54 and the end joint 58 is the same. It is set so as to have a positional relationship with the side terminal. As a result, the central joint 54 becomes the U-phase connection 14 of the neutral point connection member, the end joint 56 becomes the V-phase connection 16 of the neutral connection member, and the end joint 58 is It becomes the W-phase connection portion 18 of the neutral point connection member.

このように、図２の製造方法は、１台の剥離装置３６、１台の切断装置４６を用いて、１本の連続する絶縁皮膜付き導線３２を一定幅で絶縁皮膜３５を剥離し、所定間隔で切断するといった単純工程の繰り返しによって、中性点接続部材１２を連続的に大量製造することができるという大きな利点を有する。   As described above, the manufacturing method of FIG. 2 uses a single peeling device 36 and a single cutting device 46 to peel a single continuous conductor 32 with an insulating film from the insulating film 35 with a predetermined width, By repeating a simple process such as cutting at intervals, there is a great advantage that the neutral point connecting member 12 can be continuously mass-produced.

なお、端部接合部５６がＶ相接続部１６に接続可能な剥離部分の長さはＬ1であり、端部接合部５８がＷ相接続部１８に接続可能な剥離部分の長さもＬ1である。これに対し、中央部接合部５４は、剥離長さ２Ｌ1の第１剥離部４４を折り返したものであるので、折り返し２４における芯線３４の寸法に相当する分だけ、Ｕ相接続部１４に接合可能な剥離部分の長さがＬ1よりも少し短くなる。すなわち、図２の製造方法で形成された中性点接続部材１２は、中央部接合部５４と端部接合部５６，５８とで接合可能な剥離部分の長さが少し異なる。仮にこの小さな差異によって不便が生じたとしても、上記で述べた図２の製造方法において、１台の剥離装置３６で済むという大きな利点は、これを十分に補うものである。 Note that the length of the peeled portion at which the end joint 56 can be connected to the V-phase connecting portion 16 is L 1 , and the length of the peeled portion at which the end joint 58 can be connected to the W-phase connecting portion 18 is also L 1. It is. On the other hand, since the central joint portion 54 is the first peel portion 44 having the peel length 2L 1 folded back, the center joint portion 54 is joined to the U-phase connection portion 14 by an amount corresponding to the dimension of the core wire 34 in the turn 24. The length of the possible peeled portion is slightly shorter than L 1 . That is, in the neutral point connecting member 12 formed by the manufacturing method of FIG. 2, the lengths of the peelable portions that can be joined at the center joint 54 and the end joints 56 and 58 are slightly different. Even if inconvenience occurs due to this small difference, the great advantage that only one peeling device 36 is required in the manufacturing method of FIG. 2 described above sufficiently compensates for this.

すなわち、中央部接合部５４と端部接合部５６，５８とで接合可能な剥離部分の長さを同じにしようとすると、図２（ｂ）の部分的剥離工程において、中央部接合部５４に対応する剥離部分の長さが、端部接合部５６，５８に対応する剥離部分を合わせた長さと異なり、剥離できる長さが異なる２台の剥離装置が必要になる。これにより、設備費が増加し、剥離装置の設置のための面積が増加する。また、同じ剥離装置とした場合は、剥離に用いる刃具が相違するので、刃具の種類が増加し、刃具が誤組付けされて不良が発生する恐れがある。図２の製造方法によれば、これらの問題が発生せず、設備費が低減され、刃具の統一が可能になり、刃具の誤組付けがなく、それに伴う不良の発生が防止される。さらに、中性点接続部材１２の絶縁皮膜付き導線３２がステータ１０に用いられる絶縁皮膜付き導線と同じ場合には、ステータ１０に用いられる絶縁皮膜付き導線の絶縁皮膜剥離に、同じ剥離装置３６を用いることが可能になる。このように、図２の製造方法は、多大の利点を有する。   That is, if the lengths of the peelable portions that can be joined at the central joint 54 and the end joints 56 and 58 are made to be the same, in the partial stripping step of FIG. Unlike the combined length of the peeled portions corresponding to the end joint portions 56 and 58, the length of the corresponding peeled portions requires two peeling devices having different lengths that can be peeled. Thereby, an installation cost increases and the area for installation of a peeling apparatus increases. Moreover, when it is set as the same peeling apparatus, since the blade tools used for peeling differ, the kind of blade tools increases and there exists a possibility that a blade may be assembled | attached incorrectly and a defect may generate | occur | produce. According to the manufacturing method of FIG. 2, these problems do not occur, the equipment cost is reduced, the blades can be unified, the blades are not misassembled, and the occurrence of defects associated therewith is prevented. Further, when the conductive wire 32 with the insulating film of the neutral point connecting member 12 is the same as the conductive wire with the insulating film used for the stator 10, the same peeling device 36 is used for peeling the insulating film of the conductive wire with the insulating film used for the stator 10. Can be used. Thus, the manufacturing method of FIG. 2 has a great advantage.

１０ （回転電機）ステータ、１２ 中性点接続部材、１４ Ｕ相接続部、１６ Ｖ相接続部、１８ Ｗ相接続部、２０ 温度センサ、２２ コネクタ、２４，２６ 折り返し、３０ ボビン、３２ 絶縁皮膜付き導線、３４ 芯線、３５ 絶縁皮膜、３６ 剥離装置、４０ 部分的剥離導線、４２ 絶縁部、４３，４５ 第２剥離部、４４ （第１）剥離部、４６ 切断装置、５０ 中性点接続用導線、５０ 中性点接続部材、５４ 中央部接合部、５６，５８ 端部接合部。   10 (Rotating electric machine) Stator, 12 Neutral point connecting member, 14 U-phase connecting part, 16 V-phase connecting part, 18 W-phase connecting part, 20 Temperature sensor, 22 Connector, 24, 26 Folded, 30 Bobbin, 32 Insulating film Lead wire, 34 core wire, 35 Insulating film, 36 Peeling device, 40 Partially peeled lead wire, 42 Insulating part, 43, 45 Second peeling part, 44 (First) peeling part, 46 Cutting device, 50 For neutral point connection Conductor, 50 neutral point connection member, 54 center joint, 56, 58 end joint.

Claims (1)

絶縁皮膜付き導線の軸線方向に沿った所定間隔毎に、所定剥離長さで絶縁皮膜を順次剥離して複数の剥離部を有する部分的剥離導線を形成する工程と、
複数の剥離部を有する部分的剥離導線の軸線方向に沿って１つおきの剥離部において所定剥離長さの半分の長さとなる位置で順次切断を行い、所定剥離長さの第１剥離部を中央部に有し、所定剥離長さの半分の長さの第２剥離部を両端部に有する中性点接続用導線を形成する工程と、
中性点接続用導線を所定の折り曲げ方法で成形し、第１剥離部を所定剥離長さの半分の長さの位置で折り返して中央部接合部とし、２つの第２剥離部を中央部接合部から所定の位置関係で折り曲げ配置して２つの端部接合部として中性点接続部材を形成する成形工程と、
を含むことを特徴とする中性点接続部材の製造方法。 For each predetermined interval along the axial direction of the conductive wire with an insulating film, a step of sequentially peeling the insulating film with a predetermined peeling length to form a partially peeled conductive wire having a plurality of peeling portions;
Cut along the axial direction of the partially peeled lead wire having a plurality of peeled portions at every other peeled portion at a position that is half the predetermined peeled length, and remove the first peeled portion with the predetermined peeled length. A step of forming a neutral point connecting lead having a second peeled portion at both ends of the second peeled portion at a center portion and half the predetermined peel length;
The neutral point connecting wire is formed by a predetermined bending method, and the first peeling portion is folded back at a half length of the predetermined peeling length to be a central portion joining portion, and the two second peeling portions are joined to the central portion. Forming a neutral point connection member as two end joints by bending and arranging from a portion in a predetermined positional relationship;
The manufacturing method of the neutral point connection member characterized by including these.
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