JP2005065374A

JP2005065374A - Winding terminal connection structure

Info

Publication number: JP2005065374A
Application number: JP2003290029A
Authority: JP
Inventors: Tadayuki Hatsuda; 匡之初田; Tetsuya Niiguni; 哲也新国; Tsutomu Tanimoto; 勉谷本
Original assignee: Nissan Motor Co Ltd
Current assignee: Nissan Motor Co Ltd
Priority date: 2003-08-08
Filing date: 2003-08-08
Publication date: 2005-03-10
Anticipated expiration: 2023-08-08
Also published as: JP4581352B2

Abstract

【課題】電動機の最大出力を向上する。
【解決手段】ステータ１の内周にティースを形成し、ティースに巻線を巻回し、巻線の巻線端をリング形状のバスバー１１〜１６に接続し、バスバー１１〜１６を絶縁板３２〜３６を介して出力軸４５の軸方向に積層し、バスバー１１〜１６群のリング形状部の外周面とハウジング４０との間に熱伝導の良好な材料からなりかつ円筒カラー形状の絶縁部材３０を配置し、バスバー１１〜１６および絶縁板３１〜３７を絶縁部材３０を介してハウジング４０に圧入し、バスバー１１〜１６の外周面を絶縁部材３０を介してハウジング４０に密着する。
【選択図】図１To improve the maximum output of an electric motor.
SOLUTION: Teeth are formed on the inner periphery of a stator 1, windings are wound around the teeth, winding ends of the windings are connected to ring-shaped bus bars 11-16, and the bus bars 11-16 are connected to insulating plates 32- The insulating member 30 made of a material having good heat conduction and having a cylindrical collar shape is disposed between the outer peripheral surface of the ring-shaped portion of the bus bars 11 to 16 and the housing 40. The bus bars 11 to 16 and the insulating plates 31 to 37 are press-fitted into the housing 40 via the insulating member 30, and the outer peripheral surfaces of the bus bars 11 to 16 are brought into close contact with the housing 40 via the insulating member 30.
[Selection] Figure 1

Description

本発明は一つのティースに巻回された巻線を１相当り複数用いて構成した電動機（モータ）のステータの上記巻線の端末結線構造に関するものである。 The present invention relates to a terminal connection structure of the above-described winding of a stator of an electric motor (motor) constituted by using one or more windings wound around one tooth.

特許文献１に記載された従来例では、固定子鉄心にボビン状絶縁体を取り付け、ボビン状絶縁体にターミナルホルダを取り付け、ターミナルホルダにバスバーと絶縁板とを出力軸の軸方向に積層した積層体を保持させている。 In the conventional example described in Patent Document 1, a bobbin-like insulator is attached to a stator core, a terminal holder is attached to the bobbin-like insulator, and a bus bar and an insulating plate are laminated on the terminal holder in the axial direction of the output shaft. Hold the body.

特開２００２−７８２７２号公報JP 2002-78272 A

しかしながら、このような従来例においては、銅損（ジュール損失）に起因して巻線に発生した熱を有効に放熱することができないから、巻線の温度が上昇するので、電動機の最大出力が低下する。 However, in such a conventional example, since the heat generated in the winding due to copper loss (joule loss) cannot be effectively radiated, the temperature of the winding rises, so that the maximum output of the motor is descend.

本発明は上述の課題を解決するためになされたもので、電動機の最大出力を向上することができる巻線の端末結線構造を提供することを目的とする。 The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a winding terminal connection structure capable of improving the maximum output of an electric motor.

この目的を達成するため、本発明においては、リング形状の導電材料からなる複数のバスバーに巻線の巻線端を接続し、複数の上記バスバーを絶縁板を介して電動機の出力軸の軸方向に積層し、複数の上記バスバーの外周面を絶縁部材を介してハウジングに密着する。 In order to achieve this object, in the present invention, a winding end of a winding is connected to a plurality of bus bars made of a ring-shaped conductive material, and the plurality of bus bars are connected to an axial direction of an output shaft of an electric motor via an insulating plate. And the outer peripheral surfaces of the plurality of bus bars are in close contact with the housing via insulating members.

本発明に係る巻線の端末結線構造においては、巻線に発生した熱をバスバー、絶縁部材、ハウジングを介して放熱することができるから、巻線の温度上昇を抑えることができるので、電動機の最大出力を向上することができる。 In the terminal connection structure of the winding according to the present invention, the heat generated in the winding can be radiated through the bus bar, the insulating member, and the housing, so that the temperature rise of the winding can be suppressed. The maximum output can be improved.

（第１の実施の形態）
図１は本発明の第１の実施の形態の巻線の端末結線構造を有するスイッチト・リラクタンス・モータを示す断面図、図２は図１に示したスイッチト・リラクタンス・モータのステータ部を示す図である。図に示すように、ハウジング４０にベアリングケース４１、４２が取り付けられ、ベアリングケース４１、４２にベアリング４３、４４が取り付けられ、ベアリングケース４１、４２にベアリング４３、４４を介して出力軸４５が回転可能に支持され、出力軸４５にロータ５０、角度センサロータ５１が焼嵌め嵌合にて回転不可に固定されている。また、ハウジング４０にステータ１が焼嵌め嵌合にて回転不可に締結され、ステータ１は０．３５ｍｍ厚の電磁鋼板をプレスで打ち抜き、出力軸４５の軸方向に積層して形成されている。また、ステータ１の内周にはＵ相の４極のティースＵ１Ｔ〜Ｕ４Ｔ、Ｖ相の４極のティースＶ１Ｔ〜Ｖ４Ｔ、Ｗ相の４極のティースＷ１Ｔ〜Ｗ４Ｔ（全１２極のティース）が形成され、各ティースＵ１Ｔ〜Ｕ４Ｔ、Ｖ１Ｔ〜Ｖ４Ｔ、Ｗ１Ｔ〜Ｗ４Ｔには巻線（集中巻き巻線）Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４がティースＵ１Ｔ〜Ｕ４Ｔ、Ｖ１Ｔ〜Ｖ４Ｔ、Ｗ１Ｔ〜Ｗ４Ｔの廻りを囲むように集中的に巻回されている。そして、これらの巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４はそれぞれ２つの巻線端すなわち電流の流入側である巻線端Ｕ１Ｐ〜Ｕ４Ｐ、Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐ、電流の流出側である巻線端Ｕ１Ｎ〜Ｕ４Ｎ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎを有し、それぞれの巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎは出力軸４５とは反対方向すなわち図１紙面右方に伸びている。また、Ｕ相電流流入側のバスバー１１、Ｕ相電流流出側のバスバー１２、Ｖ相電流流入側のバスバー１３、Ｖ相電流流出側のバスバー１４、Ｗ相電流流入側のバスバー１５、Ｗ相電流流出側のバスバー１６は絶縁板（絶縁層）３２〜３６を介して出力軸４５の軸方向に積層され、絶縁板３１と絶縁板３７とによりバスバー１１〜１６群全体の前後が絶縁されている。そして、バスバー１１〜１６はリング形状であり、また厚さ２ｍｍの電気用銅板を打ち抜きで製作したものである。さらに、バスバー１１〜１６群のリング形状部の外周面とハウジング４０との間に熱伝導の良好な材料からなる絶縁部材３０が配置されており、絶縁部材３０はバスバー１１〜１６群のリング形状部の外周面とハウジング４０との絶縁をとる部材であり、絶縁部材３０の形状は円筒カラー形状である。そして、バスバー１１〜１６および絶縁板３１〜３７は絶縁部材３０を介してハウジング４０に圧入され、これにより各バスバー１１〜１６の外周面は絶縁部材３０を介してハウジング４０に密着している。また、バスバー１１〜１６の内周側に角度センサステータ５２が配置され、ハウジング４０にウォータジャケット４８が設けられている。 (First embodiment)
FIG. 1 is a sectional view showing a switched reluctance motor having a winding terminal connection structure according to a first embodiment of the present invention. FIG. 2 shows a stator portion of the switched reluctance motor shown in FIG. FIG. As shown in the figure, bearing cases 41, 42 are attached to the housing 40, bearings 43, 44 are attached to the bearing cases 41, 42, and the output shaft 45 rotates via the bearings 43, 44 to the bearing cases 41, 42. The rotor 50 and the angle sensor rotor 51 are fixed to the output shaft 45 so as not to rotate by shrink fitting. Further, the stator 1 is fastened to the housing 40 by shrink fitting so as not to rotate, and the stator 1 is formed by punching out a 0.35 mm thick electromagnetic steel sheet with a press and laminating it in the axial direction of the output shaft 45. In addition, U-phase four-pole teeth U1T to U4T, V-phase four-pole teeth V1T to V4T, and W-phase four-pole teeth W1T to W4T (all 12-pole teeth) are formed on the inner periphery of the stator 1. Each of the teeth U1T to U4T, V1T to V4T, W1T to W4T has windings (concentrated windings) U1 to U4, V1 to V4, and W1 to W4 are teeth U1T to U4T, V1T to V4T, and W1T to W4T. It is intensively wound around the area. These windings U1 to U4, V1 to V4, and W1 to W4 are two winding ends, that is, winding ends U1P to U4P, V1P to V4P, W1P to W4P, which are current inflow sides, and current outflow sides, respectively. Winding ends U1N to U4N, V1N to V4N, W1N to W4N, and the winding ends U1P to W4P and U1N to W4N extend in the opposite direction to the output shaft 45, that is, to the right in FIG. . Also, the U-phase current inflow side bus bar 11, the U-phase current outflow side bus bar 12, the V-phase current inflow side bus bar 13, the V-phase current outflow side bus bar 14, the W-phase current inflow side bus bar 15, the W-phase current. The bus bar 16 on the outflow side is laminated in the axial direction of the output shaft 45 via insulating plates (insulating layers) 32 to 36, and the front and rear of the entire bus bar 11 to 16 group are insulated by the insulating plate 31 and the insulating plate 37. . The bus bars 11 to 16 have a ring shape, and are manufactured by punching an electrical copper plate having a thickness of 2 mm. Further, an insulating member 30 made of a material having good heat conduction is disposed between the outer peripheral surface of the ring-shaped portion of the bus bars 11 to 16 group and the housing 40, and the insulating member 30 is a ring shape of the bus bars 11 to 16 group. This is a member that takes insulation between the outer peripheral surface of the part and the housing 40, and the shape of the insulating member 30 is a cylindrical collar shape. The bus bars 11 to 16 and the insulating plates 31 to 37 are press-fitted into the housing 40 via the insulating member 30, whereby the outer peripheral surfaces of the bus bars 11 to 16 are in close contact with the housing 40 via the insulating member 30. An angle sensor stator 52 is disposed on the inner peripheral side of the bus bars 11 to 16, and a water jacket 48 is provided on the housing 40.

図３は図１、図２に示した巻線の端末結線構造に使用するバスバーを示す図、図４、図５は図１、図２に示したスイッチト・リラクタンス・モータの一部を示す図である。図に示すように、バスバー１１〜１６のリング形状部には大きさの異なる２種類の貫通穴すなわち巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎの断面形状に応じた第１の貫通穴９１（小さい貫通穴）、巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎの断面形状より大きい第２の貫通穴９２（大きい貫通穴）が形成されている。そして、貫通穴９１はバスバー１１〜１６に接続する（結線する）巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎの位置に対応した箇所に形成され、貫通穴９２はバスバー１１〜１６に接続しない巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎの位置に対応した箇所に形成されている。なお、バスバー１１〜１６のリング形状部から伸びたバー状部は電動機の外に給電端子を配置するための引き出し線に相当する部分である。また、バスバー１１〜１６群の両側およびバスバー１１〜１６の間には厚さ１ｍｍの絶縁板３１〜３７が設けられ、絶縁板３２〜３６の両側のバスバー１１〜１６間の沿面距離を確保しており、絶縁板３１〜３７もバスバー１１〜１６と同様の形状をしており、絶縁板３１〜３７には前述した貫通穴９２より若干直径が小さな貫通穴が設けられている。なお、絶縁板３１〜３７の厚さは両側のバスバー１１〜１６の電位差を考慮して、絶縁距離を確保した厚さとなっている。そして、バスバー１１（第１層のバスバー）には巻線端Ｕ１Ｐ〜Ｕ４Ｐが接続される。すなわち、バスバー１１には巻線端Ｕ１Ｐ〜Ｕ４Ｐに対応する箇所に貫通穴９１が設けられ、巻線端Ｕ１Ｐ〜Ｕ４Ｐを貫通穴９１に貫通させたのち、バスバー１１と巻線端Ｕ１Ｐ〜Ｕ４Ｐとを半田付けする。また、バスバー１１の巻線端Ｕ１Ｐ〜Ｕ４Ｐを除く他の巻線端Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｕ４Ｎ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎに対応する箇所には貫通穴９２が設けられていて、巻線端Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｕ４Ｎ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎはバスバー１１と接触することなく、更に巻線端Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｕ４Ｎ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎは図４紙面手前側まで伸びている。また、バスバー１２（第２層のバスバー）には巻線端Ｕ１Ｎ〜Ｕ４Ｎが接続される。すなわち、バスバー１２には巻線端Ｕ１Ｎ〜Ｕ４Ｎに対応する箇所に貫通穴９１が設けられ、巻線端Ｕ１Ｎ〜Ｕ４Ｎを貫通穴９１に貫通させたのち、バスバー１２と巻線端Ｕ１Ｎ〜Ｕ４Ｎとを半田付けする。また、バスバー１２の巻線端Ｕ１Ｎ〜Ｕ４Ｎを除く他の巻線端Ｕ１Ｐ〜Ｕ４Ｐ、Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎに対応する箇所には貫通穴９２が設けられていて、巻線端Ｕ１Ｐ〜Ｕ４Ｐ、Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎはバスバー１２と接触することなく、更に巻線端Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎは図５紙面手前側まで伸びている。このようにして、同一相の巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４の電流の流入側である巻線端Ｕ１Ｐ〜Ｕ４Ｐ、Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐ同士が接続され、また電流の流出側である巻線端Ｕ１Ｎ〜Ｕ４Ｎ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎ同士が接続される。つまり、Ｕ相において、巻線端Ｕ１Ｐ〜Ｕ４Ｐがバスバー１１により接続され、また巻線端Ｕ１Ｎ〜Ｕ４Ｎがバスバー１２により接続される。Ｖ相、Ｗ相においても同様である。このように、１つの相について４つの巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４で構成し、同一相の巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４はそれぞれ並列に接続されている。また、同一相の巻線の通電方向を同一とする一方の巻線端Ｕ１Ｐ〜Ｕ４Ｐ、Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐが接続されたバスバー１１、１３、１５と他方の巻線端Ｕ１Ｎ〜Ｕ４Ｎ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎが接続されたバスバー１２、１４、１６とにより１相分のバスバー組が構成され、Ｕ相のバスバー組のバスバー１１、１２が絶縁板３２を介して積層方向直近に配置され、Ｖ相のバスバー組のバスバー１３、１４が絶縁板３４を介して積層方向直近に配置され、Ｗ相のバスバー組のバスバー１５、１６が絶縁板３６を介して積層方向直近に配置されている。 FIG. 3 is a view showing a bus bar used for the terminal connection structure of the winding shown in FIGS. 1 and 2, and FIGS. 4 and 5 are a part of the switched reluctance motor shown in FIGS. FIG. As shown in the figure, the ring-shaped portions of the bus bars 11 to 16 have two types of through-holes having different sizes, that is, first through-holes 91 (small) corresponding to the cross-sectional shapes of the winding ends U1P to W4P and U1N to W4N. 2nd through-hole 92 (large through-hole) larger than the cross-sectional shape of winding end U1P-W4P, U1N-W4N. The through hole 91 is formed at a location corresponding to the position of the winding ends U1P to W4P and U1N to W4N connected (connected) to the bus bars 11 to 16, and the through hole 92 is a winding not connected to the bus bars 11 to 16 They are formed at locations corresponding to the positions of the ends U1P to W4P and U1N to W4N. In addition, the bar-shaped part extended from the ring-shaped part of the bus bars 11-16 is a part corresponded to the lead wire for arrange | positioning an electric power feeding terminal outside an electric motor. In addition, insulating plates 31 to 37 having a thickness of 1 mm are provided on both sides of the bus bars 11 to 16 and between the bus bars 11 to 16, and a creepage distance between the bus bars 11 to 16 on both sides of the insulating plates 32 to 36 is ensured. The insulating plates 31 to 37 have the same shape as the bus bars 11 to 16, and the insulating plates 31 to 37 are provided with through holes having a slightly smaller diameter than the through holes 92 described above. The thickness of the insulating plates 31 to 37 is a thickness that secures an insulating distance in consideration of the potential difference between the bus bars 11 to 16 on both sides. The winding ends U1P to U4P are connected to the bus bar 11 (first-layer bus bar). That is, the bus bar 11 is provided with through holes 91 at locations corresponding to the winding ends U1P to U4P, and after passing the winding ends U1P to U4P through the through holes 91, the bus bar 11 and the winding ends U1P to U4P Solder. Also, through holes 92 are provided at locations corresponding to the other winding ends V1P to V4P, W1P to W4P, U1N to U4N, V1N to V4N, and W1N to W4N except the winding ends U1P to U4P of the bus bar 11. Winding ends V1P to V4P, W1P to W4P, U1N to U4N, V1N to V4N, W1N to W4N are not in contact with the bus bar 11, and winding ends V1P to V4P, W1P to W4P, U1N to U4N, V1N ˜V4N and W1N to W4N extend to the front side of FIG. In addition, winding ends U1N to U4N are connected to the bus bar 12 (second-layer bus bar). That is, the bus bar 12 is provided with through holes 91 at locations corresponding to the winding ends U1N to U4N, and after passing the winding ends U1N to U4N through the through holes 91, the bus bar 12 and the winding ends U1N to U4N Solder. Further, through holes 92 are provided at locations corresponding to the other winding ends U1P to U4P, V1P to V4P, W1P to W4P, V1N to V4N, and W1N to W4N except for the winding ends U1N to U4N of the bus bar 12. Winding ends U1P to U4P, V1P to V4P, W1P to W4P, V1N to V4N, W1N to W4N are not in contact with bus bar 12, and winding ends V1P to V4P, W1P to W4P, V1N to V4N, W1N ˜W4N extends to the front side of FIG. In this way, the winding ends U1P to U4P, V1P to V4P, and W1P to W4P on the current inflow side of the windings U1 to U4, V1 to V4, and W1 to W4 of the same phase are connected to each other, and The winding ends U1N to U4N, V1N to V4N, and W1N to W4N on the outflow side are connected to each other. That is, in the U phase, the winding ends U1P to U4P are connected by the bus bar 11, and the winding ends U1N to U4N are connected by the bus bar 12. The same applies to the V phase and the W phase. In this way, one phase is composed of four windings U1 to U4, V1 to V4, and W1 to W4, and the same phase windings U1 to U4, V1 to V4, and W1 to W4 are connected in parallel. Yes. In addition, bus bars 11, 13, and 15 to which one winding ends U1P to U4P, V1P to V4P, and W1P to W4P are connected in the same direction of windings of the same phase windings and the other winding ends U1N to U4N, A bus bar set for one phase is constituted by the bus bars 12, 14, and 16 to which V1N to V4N and W1N to W4N are connected, and the bus bars 11 and 12 of the U-phase bus bar set are brought close to each other in the stacking direction via the insulating plate 32. The bus bars 13 and 14 of the V-phase bus bar set are arranged immediately in the stacking direction via the insulating plate 34, and the bus bars 15 and 16 of the W-phase bus bar set are set close to the stacking direction via the insulating plate 36. ing.

ところで、各巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４には電流により銅損が発生し、各巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４が発熱する。この熱は巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４が巻かれているティースＵ１Ｔ〜Ｕ４Ｔ、Ｖ１Ｔ〜Ｖ４Ｔ、Ｗ１Ｔ〜Ｗ４Ｔにも逃げるが、巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４に施されたワニス、巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４とティースＵ１Ｔ〜Ｕ４Ｔ、Ｖ１Ｔ〜Ｖ４Ｔ、Ｗ１Ｔ〜Ｗ４Ｔとの間に施された絶縁紙などにより、ティースＵ１Ｔ〜Ｕ４Ｔ、Ｖ１Ｔ〜Ｖ４Ｔ、Ｗ１Ｔ〜Ｗ４Ｔに逃げる熱流路の熱抵抗は大きい。これに比較すると、電気用銅の熱伝導率は良好であるから、巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４を伝って、巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４と同じ電気用銅で形成されかつ直近に配置されたバスバー１１〜１６に熱は流れ込む。そして、図１に示した巻線の端末結線構造においては、バスバー１１〜１６の外周面が絶縁部材３０を介してハウジング４０に密着しているから、巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４に発生した熱はバスバー１１〜１６、絶縁部材３０、ハウジング４０を介して放熱されるので、巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４の温度上昇が抑えられるため、電動機の最大出力を向上することができる。 By the way, copper loss generate | occur | produces in each winding U1-U4, V1-V4, W1-W4 by an electric current, and each winding U1-U4, V1-V4, W1-W4 heat | fever-generates. This heat escapes to the teeth U1T to U4T, V1T to V4T, and W1T to W4T around which the windings U1 to U4, V1 to V4, W1 to W4 are wound, but the windings U1 to U4, V1 to V4, W1 Teeth U1T to U4T, such as varnish applied to W4, windings U1 to U4, V1 to V4, W1 to W4 and insulating paper applied between the teeth U1T to U4T, V1T to V4T, and W1T to W4T, The thermal resistance of the heat flow path that escapes to V1T to V4T and W1T to W4T is large. Compared to this, since the thermal conductivity of electrical copper is good, it is the same as the windings U1 to U4, V1 to V4, and W1 to W4 through the windings U1 to U4, V1 to V4, and W1 to W4. Heat flows into the bus bars 11 to 16 which are made of electrical copper and are arranged in the immediate vicinity. In the winding terminal connection structure shown in FIG. 1, the outer peripheral surfaces of the bus bars 11 to 16 are in close contact with the housing 40 via the insulating member 30, so that the windings U 1 to U 4, V 1 to V 4, W 1. Since the heat generated in W4 is dissipated through the bus bars 11-16, the insulating member 30, and the housing 40, the temperature rise of the windings U1 to U4, V1 to V4, W1 to W4 can be suppressed. The output can be improved.

また、各バスバー１１〜１６の外周面が絶縁部材３０を介してハウジング４０に密着しているから、各バスバー１１〜１６の熱はそれぞれ同等にハウジング４０に放熱される。したがって、巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４の相間の温度バラツキが低減されるから、相間の温度バラツキに起因したトルク脈動が生じない。 Moreover, since the outer peripheral surface of each bus-bar 11-16 is closely_contact | adhered to the housing 40 via the insulating member 30, the heat of each bus-bar 11-16 is radiated | emitted to the housing 40 equally, respectively. Therefore, since the temperature variation between the phases of the windings U1 to U4, V1 to V4, and W1 to W4 is reduced, torque pulsation due to the temperature variation between the phases does not occur.

また、同一相の巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４が並列接続されているから、各巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４からの熱流は略同等であり、巻線Ｕ１〜Ｕ４の温度、Ｖ１〜Ｖ４の温度、Ｗ１〜Ｗ４の温度も同等である。たとえば、図６に示すように、巻線Ｕ１〜Ｕ４を直列接続したときには、過渡状態において巻線Ｕ２、Ｕ３の温度が高くなってしまうのに対して、図７に示すように、巻線Ｕ１〜Ｕ４を並列接続したときには、巻線Ｕ１〜Ｕ４とバスバー１１、１２とが電気的に直近に配置されるから、過渡状態においても巻線Ｕ１〜Ｕ４の温度は同等である。そして、巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４の温度不平衡が生じると、電流値にバラツキが生じ、各ティースＵ１Ｔ〜Ｕ４Ｔ、Ｖ１Ｔ〜Ｖ４Ｔ、Ｗ１Ｔ〜Ｗ４Ｔに励起される起磁力に不平衡が生じてトルク脈動が生じることがあるが、本実施の形態においては、巻線Ｕ１〜Ｕ４の温度、Ｖ１〜Ｖ４の温度、Ｗ１〜Ｗ４の温度は同等であるから、トルク脈動が生じることがない。 In addition, since the same-phase windings U1 to U4, V1 to V4, and W1 to W4 are connected in parallel, the heat flows from the windings U1 to U4, V1 to V4, and W1 to W4 are substantially the same. The temperature of U1-U4, the temperature of V1-V4, and the temperature of W1-W4 are also equivalent. For example, as shown in FIG. 6, when the windings U1 to U4 are connected in series, the temperatures of the windings U2 and U3 become high in the transient state, whereas the winding U1 is shown in FIG. When U4 is connected in parallel, the windings U1 to U4 and the bus bars 11 and 12 are electrically arranged close to each other, so that the temperatures of the windings U1 to U4 are the same even in the transient state. And when temperature imbalance of winding U1-U4, V1-V4, W1-W4 arises, variation will arise in an electric current value, and it is in the magnetomotive force excited by each teeth U1T-U4T, V1T-V4T, W1T-W4T. Torque pulsation may occur due to imbalance, but in this embodiment, the temperature of the windings U1 to U4, the temperature of V1 to V4, and the temperature of W1 to W4 are equal, and thus torque pulsation occurs. There is nothing.

また、バスバー１１〜１６をリング形状としているから、バスバー１１〜１６の内周側に角度センサ、軸受などのロータ構成部品を配置することができるので、電動機が出力軸の軸方向に長くなるといった問題が生じない。また、たとえばＵ相の巻線Ｕ１〜Ｕ４の巻線端Ｕ１Ｐ〜Ｕ４Ｐを接続するという機能を満足するには、バスバー１１をリング形状ではなく、巻線端Ｕ３Ｐが接続された箇所と巻線端Ｕ４Ｐが接続された箇所との間を切り欠いた円弧形状としても構わないが、本実施の形態ではバスバー１１〜１６をリング形状としているから、バスバー１１〜１６に流入した熱をリング形状の外周面に一様に分散させることができる。また、バスバー１１〜１６を厚みのあるリング形状としているから、熱マスを増化することができる。また、ハウジング４０にウォータジャケット４８が設けられているから、ステータ１を冷却することができ、またステータ１と共通的にバスバー１１〜１６群も冷却されるので、バスバー１１〜１６群専用の冷却装置を設ける必要がない。 Further, since the bus bars 11 to 16 are ring-shaped, rotor components such as angle sensors and bearings can be arranged on the inner peripheral side of the bus bars 11 to 16, so that the electric motor becomes longer in the axial direction of the output shaft. There is no problem. For example, in order to satisfy the function of connecting the winding ends U1P to U4P of the U-phase windings U1 to U4, the bus bar 11 is not formed in a ring shape, and the winding end and the winding end U3P are connected. Although it may have a circular arc shape that is notched between the U4P and the connected portion, in this embodiment, the bus bars 11 to 16 are ring-shaped, so the heat flowing into the bus bars 11 to 16 is transferred to the outer periphery of the ring shape. It can be uniformly distributed on the surface. Moreover, since the bus bars 11 to 16 have a thick ring shape, the thermal mass can be increased. Further, since the water jacket 48 is provided in the housing 40, the stator 1 can be cooled, and the bus bars 11 to 16 group are also cooled in common with the stator 1, so that the cooling for the bus bars 11 to 16 group is exclusively performed. There is no need to provide a device.

また、接続する巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎの位置に対応した箇所に、巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎの断面形状に応じた貫通穴９１を形成し、巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎを貫通穴９１を貫通して接続し、また接続しない巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎに対応した箇所に巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎとバスバー１１〜１６とが接触しないよう巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎの断面形状より大きい貫通穴９２を形成しているから、各巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４の接続を確実にかつ容易に行なうことができ、またバスバー１１〜１６の径方向の幅を大きくとることができるから、バスバー１１〜１６の厚さをそれほど増さずに相当の熱マスを確保することできるので、バスバー１１〜１６の積層体の軸方向寸法を抑えることができるため、電動機を小型化することができる。 Further, through holes 91 corresponding to the cross-sectional shapes of the winding ends U1P to W4P and U1N to W4N are formed at locations corresponding to the positions of the winding ends U1P to W4P and U1N to W4N to be connected. W4P, U1N to W4N are connected through the through hole 91, and winding ends U1P to W4P, U1N to W4N and bus bars 11 to 16 are connected to the winding ends U1P to W4P and U1N to W4N that are not connected. Since the through holes 92 larger than the cross-sectional shapes of the winding ends U1P to W4P and U1N to W4N are formed so that they do not come into contact with each other, the connections of the windings U1 to U4, V1 to V4, W1 to W4 are surely and easily performed. Since it is possible to increase the radial width of the bus bars 11-16, it is possible to ensure a considerable thermal mass without increasing the thickness of the bus bars 11-16 so much. It is possible to suppress the axial dimension of the stack of bus bar 11 to 16, it is possible to miniaturize the motor.

また、バスバー組のバスバー１１、１２、バスバー１３、１４、バスバー１５、１６を絶縁板３２、３４、３６を介して積層方向直近に配置しているから、バスバー１１、１２間、バスバー１３、１４間、バスバー１５、１６間の寄生インダクタンスを低減することがきできるので、電源電圧を効率良く巻線インダクタンスに印加することができる。なお、寄生インダクタンス低減の効果は巻線インダクタンスが低インダクタンスである電動機において大きい。 In addition, the bus bars 11 and 12, the bus bars 13 and 14, and the bus bars 15 and 16 of the bus bar set are arranged in the closest stacking direction via the insulating plates 32, 34, and 36, so the bus bars 11 and 12 and the bus bars 13 and 14 are disposed. Since the parasitic inductance between the bus bars 15 and 16 can be reduced, the power supply voltage can be efficiently applied to the winding inductance. The effect of reducing the parasitic inductance is great in an electric motor having a low winding inductance.

（第２の実施の形態）
図８は本発明の第２の実施の形態の巻線の端末結線構造に使用するバスバーを示す図、図９、図１０は図８に示したバスバーを有するスイッチト・リラクタンス・モータの一部を示す図である。図に示すように、Ｕ相電流流入側のバスバー２１、Ｕ相電流流出側のバスバー２２、Ｖ相電流流入側のバスバー２３、Ｖ相電流流出側のバスバー２４、Ｗ相電流流入側のバスバー２５、Ｗ相電流流出側のバスバー２６はリング形状であり、バスバー２１〜２６は厚さ２ｍｍの電気用銅板を打ち抜きで製作したものである。そして、バスバー２１〜２６のリング形状部の内周部には、バスバー２１〜２６に接続する巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎに対応して突出部９３が形成されている。また、バスバー２１（第１層のバスバー）には巻線端Ｕ１Ｐ〜Ｕ４Ｐが接続される。すなわち、バスバー２１の巻線端Ｕ１Ｐ〜Ｕ４Ｐに対応する箇所に突出部９３が形成され、巻線端Ｕ１Ｐ〜Ｕ４Ｐはバスバー２１の突出部９３に半田付けされている。また、巻線端Ｕ１Ｐ〜Ｕ４Ｐを除く他の巻線端Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｕ４Ｎ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎはバスバー２１の突出部９３およびリング形状部に接触することなく更に図９紙面手前側まで伸びている。また、バスバー２２（第２層のバスバー）には巻線端Ｕ１Ｎ〜Ｕ４Ｎが接続される。すなわち、バスバー２２の巻線端Ｕ１Ｎ〜Ｕ４Ｎに対応する箇所に突出部９３が形成され、巻線端Ｕ１Ｎ〜Ｕ４Ｎはバスバー２２の突出部９３に半田付けされている。また、巻線端Ｕ１Ｐ〜Ｕ４Ｐ、Ｕ１Ｎ〜Ｕ４Ｎを除く他の巻線端Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎはバスバー２２の突出部９３およびリング形状部に接触することなく更に図１０紙面手前側まで伸びている。このようにして、同一相の巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４の電流の流入側である巻線端Ｕ１Ｐ〜Ｕ４Ｐ、Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐ同士が接続され、また電流の流出側である巻線端Ｕ１Ｎ〜Ｕ４Ｎ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎ同士が接続される。つまり、たとえばＵ相において、巻線端Ｕ１Ｐ〜Ｕ４Ｐがバスバー２１により接続され、また巻線端Ｕ１Ｎ〜Ｕ４Ｎがバスバー２２により接続される。そして、Ｖ相、Ｗ相においても同様である。このように、１つの相について４つの巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４で構成され、同一相の巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４はそれぞれ並列に接続されている。また、同一相の巻線の通電方向を同一とする一方の巻線端Ｕ１Ｐ〜Ｕ４Ｐ、Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐが接続されたバスバー２１、２３、２５と他方の巻線端Ｕ１Ｎ〜Ｕ４Ｎ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎが接続されたバスバー２２、２４、２６により１相分のバスバー組が構成されている。そして、他の構成は図１に示した構成と同様である。すなわち、Ｕ相のバスバー組のバスバー２１、２２が絶縁板３２を介して積層方向直近に配置され、Ｖ相のバスバー組のバスバー２３、２４が絶縁板３４を介して積層方向直近に配置され、Ｗ相のバスバー組のバスバー２５、２６が絶縁板３６を介して積層方向直近に配置されている。そして、バスバー２１〜２６および絶縁板３１〜３７は絶縁部材３０を介してハウジング４０に圧入され、これにより各バスバー２１〜２６の外周面は絶縁部材３０を介してハウジング４０に密着している。 (Second Embodiment)
FIG. 8 is a diagram showing a bus bar used in the terminal connection structure of the winding according to the second embodiment of the present invention. FIGS. 9 and 10 are a part of a switched reluctance motor having the bus bar shown in FIG. FIG. As shown in the figure, a bus bar 21 on the U phase current inflow side, a bus bar 22 on the U phase current outflow side, a bus bar 23 on the V phase current inflow side, a bus bar 24 on the V phase current outflow side, and a bus bar 25 on the W phase current inflow side. The bus bar 26 on the W-phase current outflow side has a ring shape, and the bus bars 21 to 26 are manufactured by punching an electrical copper plate having a thickness of 2 mm. And the protrusion part 93 is formed in the inner peripheral part of the ring-shaped part of the bus bars 21-26 corresponding to the winding ends U1P-W4P, U1N-W4N connected to the bus bars 21-26. In addition, winding ends U1P to U4P are connected to the bus bar 21 (first-layer bus bar). In other words, the protrusions 93 are formed at locations corresponding to the winding ends U1P to U4P of the bus bar 21, and the winding ends U1P to U4P are soldered to the protrusions 93 of the bus bar 21. The other winding ends V1P to V4P, W1P to W4P, U1N to U4N, V1N to V4N, and W1N to W4N except for the winding ends U1P to U4P do not contact the protruding portion 93 and the ring-shaped portion of the bus bar 21. Further, it extends to the front side of the sheet of FIG. Further, the winding ends U1N to U4N are connected to the bus bar 22 (second layer bus bar). That is, a protrusion 93 is formed at a location corresponding to the winding ends U1N to U4N of the bus bar 22, and the winding ends U1N to U4N are soldered to the protrusion 93 of the bus bar 22. Also, the winding ends V1P to V4P, W1P to W4P, V1N to V4N, and W1N to W4N except for the winding ends U1P to U4P and U1N to U4N do not contact the protruding portion 93 and the ring-shaped portion of the bus bar 22. Further, it extends to the front side of the sheet of FIG. In this way, the winding ends U1P to U4P, V1P to V4P, and W1P to W4P on the current inflow side of the windings U1 to U4, V1 to V4, and W1 to W4 of the same phase are connected to each other, and The winding ends U1N to U4N, V1N to V4N, and W1N to W4N on the outflow side are connected to each other. That is, for example, in the U phase, the winding ends U1P to U4P are connected by the bus bar 21, and the winding ends U1N to U4N are connected by the bus bar 22. The same applies to the V phase and the W phase. In this way, one phase is composed of four windings U1 to U4, V1 to V4, and W1 to W4, and the same phase windings U1 to U4, V1 to V4, and W1 to W4 are connected in parallel. Yes. In addition, bus bars 21, 23, and 25 connected to one winding ends U1P to U4P, V1P to V4P, W1P to W4P and the other winding ends U1N to U4N, which have the same energization direction of the same phase windings, A bus bar set for one phase is constituted by the bus bars 22, 24 and 26 to which V1N to V4N and W1N to W4N are connected. Other configurations are the same as those shown in FIG. That is, the bus bars 21 and 22 of the U-phase bus bar set are arranged immediately in the stacking direction via the insulating plate 32, and the bus bars 23 and 24 of the V-phase bus bar set are set close to the stacking direction via the insulating plate 34, The bus bars 25 and 26 of the W-phase bus bar set are arranged in the vicinity of the stacking direction via the insulating plate 36. The bus bars 21 to 26 and the insulating plates 31 to 37 are press-fitted into the housing 40 via the insulating member 30, whereby the outer peripheral surfaces of the bus bars 21 to 26 are in close contact with the housing 40 via the insulating member 30.

このような巻線の端末結線構造においては、バスバー２１〜２６の内周側の巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎの位置に対応した箇所に突出部９３を形成し、巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎは突出部９３に接続しているから、巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎとバスバー２１〜２６との接続のための工具をバスバー２１〜２６の内周側から挿入することができるので、作業性を向上することができる。 In such a terminal connection structure of windings, protrusions 93 are formed at locations corresponding to the positions of winding ends U1P to W4P, U1N to W4N on the inner peripheral side of bus bars 21 to 26, and winding ends U1P to Since W4P and U1N to W4N are connected to the protruding portion 93, a tool for connecting the winding ends U1P to W4P, U1N to W4N and the bus bars 21 to 26 is inserted from the inner peripheral side of the bus bars 21 to 26. Therefore, workability can be improved.

また、図１１に示すようなバスバー２１〜２６の積層体を製作し、バスバー２１〜２６の突出部９３を除く部分を絶縁素材でモールドし、このモールドしたバスバー２１〜２６の積層体を巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４が施されたステータ１が収容されたハウジング４０に圧入し、バスバー２１〜２６の突出部９３に巻線端Ｕ１Ｐ〜Ｗ４Ｐ、Ｕ１Ｎ〜Ｗ４Ｎを接続してもよい。 Further, a laminated body of bus bars 21 to 26 as shown in FIG. 11 is manufactured, a portion excluding the protruding portion 93 of the bus bars 21 to 26 is molded with an insulating material, and the laminated body of the bus bars 21 to 26 is wound. It press-fits into the housing 40 in which the stator 1 to which U1 to U4, V1 to V4, and W1 to W4 are applied is housed, and the winding ends U1P to W4P and U1N to W4N are connected to the protruding portions 93 of the bus bars 21 to 26. Also good.

（第３の実施の形態）
図１２は本発明の第３の実施の形態の巻線の端末結線構造を有するスイッチト・リラクタンス・モータを示す断面図である。図に示すように、バスバー１１、１３、１５は絶縁板６２、６３を挟んで出力軸４５の軸方向に積層され、絶縁板６１と絶縁板６４とはバスバー１１、１３、１５群全体の前後を絶縁している。また、バスバー１２、１４、１６は絶縁板６６、６７を挟んで出力軸４５の軸方向に積層され、絶縁板６５と絶縁板６８とはバスバー１２、１４、１６群全体の前後を絶縁している。そして、バスバー１１、１３、１５は電動機リヤ側（ステータ１の図１２紙面右側）に配置され、バスバー１１、１３、１５群のリング形状部の外周面とハウジング４０との間に熱伝導の良好な材料からなる絶縁部材７１が配置されており、絶縁部材７１はバスバー１１、１３、１５群のリング形状部の外周面とハウジング４０との絶縁をとる部材であり、絶縁部材７１の形状は円筒カラー形状である。そして、バスバー１１、１３、１５および絶縁板６１〜６４は絶縁部材７１を介してハウジング４０に圧入され、これにより各バスバー１１、１３、１５の外周面は絶縁部材７１を介してハウジング４０に密着している。また、バスバー１２、１４、１６は電動機フロント側（ステータ１の図１２紙面左側）に配置され、バスバー１２、１４、１６群のリング形状部の外周面とハウジング４０との間に熱伝導の良好な材料からなる絶縁部材７２が配置されており、絶縁部材７２はバスバー１２、１４、１６群のリング形状部の外周面とハウジング４０との絶縁をとる部材であり、絶縁部材７２の形状は円筒カラー形状である。そして、バスバー１２、１４、１６および絶縁板６５〜６８は絶縁部材７２を介してハウジング４０に圧入され、これにより各バスバー１２、１４、１６の外周面は絶縁部材７２を介してハウジング４０に密着している。すなわち、バスバー１１、１３、１５とバスバー１２、１４、１６とがステータ１および巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４を挟んだ反対側に配置されている。 (Third embodiment)
FIG. 12 is a cross-sectional view showing a switched reluctance motor having a winding terminal connection structure according to a third embodiment of the present invention. As shown in the figure, the bus bars 11, 13, and 15 are laminated in the axial direction of the output shaft 45 with the insulating plates 62 and 63 interposed therebetween, and the insulating plate 61 and the insulating plate 64 are the front and rear of the entire group of bus bars 11, 13, and 15. Is insulated. The bus bars 12, 14, and 16 are laminated in the axial direction of the output shaft 45 with the insulating plates 66 and 67 interposed therebetween. The insulating plate 65 and the insulating plate 68 insulate the entire front and rear of the bus bars 12, 14, and 16 groups. Yes. The bus bars 11, 13, and 15 are disposed on the rear side of the motor (right side of FIG. 12 of the stator 1), and have good heat conduction between the outer peripheral surface of the ring-shaped portion of the group of bus bars 11, 13, and 15 and the housing 40. An insulating member 71 made of a material is disposed, and the insulating member 71 is a member that insulates the outer peripheral surface of the ring-shaped portion of the bus bars 11, 13, and 15 groups from the housing 40, and the insulating member 71 has a cylindrical shape Color shape. The bus bars 11, 13, 15 and the insulating plates 61 to 64 are press-fitted into the housing 40 via the insulating member 71, whereby the outer peripheral surfaces of the bus bars 11, 13, 15 are in close contact with the housing 40 via the insulating member 71. doing. The bus bars 12, 14, and 16 are disposed on the front side of the motor (left side of FIG. 12 of the stator 1), and have good heat conduction between the outer peripheral surface of the ring-shaped portion of the bus bars 12, 14, and 16 groups and the housing 40. An insulating member 72 made of a different material is disposed. The insulating member 72 is a member that insulates the outer peripheral surface of the ring-shaped portion of the bus bars 12, 14, and 16 group from the housing 40. The insulating member 72 has a cylindrical shape. Color shape. The bus bars 12, 14 and 16 and the insulating plates 65 to 68 are press-fitted into the housing 40 via the insulating member 72, whereby the outer peripheral surfaces of the bus bars 12, 14 and 16 are in close contact with the housing 40 via the insulating member 72. doing. That is, the bus bars 11, 13, and 15 and the bus bars 12, 14, and 16 are disposed on the opposite sides of the stator 1 and the windings U1 to U4, V1 to V4, and W1 to W4.

このような巻線の端末結線構造においては、Ｕ相のバスバー組のバスバー１１、１２をステータ１および巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４を挟んだ反対側に配置し、Ｖ相のバスバー組のバスバー１３、１４をステータ１および巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４を挟んだ反対側に配置し、Ｖ相のバスバー組のバスバー１５、１６をステータ１および巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４を挟んだ反対側に配置しているから、巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４からバスバー１１〜１６に流入する熱量を分散することができ、またハウジング４０におけるバスバー１１〜１６の外周面と密着する箇所の熱集中を分散できるので、放熱効果を向上することができる。 In such a terminal connection structure of windings, bus bars 11 and 12 of a U-phase bus bar set are arranged on the opposite side across the stator 1 and windings U1 to U4, V1 to V4, W1 to W4, and V phase The bus bars 13 and 14 of the bus bar set are arranged on the opposite side across the stator 1 and the windings U1 to U4, V1 to V4, W1 to W4, and the bus bars 15 and 16 of the V-phase bus bar set are placed on the stator 1 and the windings Since U1 to U4, V1 to V4, and W1 to W4 are arranged on the opposite side, the amount of heat flowing into the bus bars 11 to 16 from the windings U1 to U4, V1 to V4, and W1 to W4 can be dispersed. Moreover, since the heat concentration of the part which closely_contact | adheres with the outer peripheral surface of the bus bars 11-16 in the housing 40 can be disperse | distributed, the heat dissipation effect can be improved.

（第４の実施の形態）
図１３は本発明の第４の実施の形態の巻線の端末結線構造を有する４相のスイッチト・リラクタンス・モータを示す断面図である。図に示すように、バスバー１１、１２、１５、１６は絶縁板６２〜６４を挟んで出力軸４５の軸方向に積層され、絶縁板６１と絶縁板６９とはバスバー１１、１２、１５、１６群全体の前後を絶縁している。また、バスバー１３、１４、Ｘ相電流流入側のバスバー１７、Ｘ相電流流出側のバスバー１８は絶縁板６６〜６８を挟んで出力軸４５の軸方向に積層され、絶縁板６５と絶縁板７０とはバスバー１３、１４、１７、１８群全体の前後を絶縁している。すなわち、バスバー組のバスバー１１、１２、バスバー１３、１４、バスバー１５、１６、バスバー１７、１８が積層方向直近に配置されている。そして、バスバー１７、１８はリング形状であり、厚さ２ｍｍの電気用銅板を打ち抜きで製作したものである。また、バスバー１１、１２、１５、１６は電動機リヤ側（ステータ１の図１３紙面右側）に配置され、バスバー１１、１２、１５、１６群のリング形状部の外周面とハウジング４０との間に絶縁部材７１が配置されている。そして、バスバー１１、１２、１５、１６および絶縁板６１〜６４、６９は絶縁部材７１を介してハウジング４０に圧入され、これにより各バスバー１１、１２、１５、１６の外周面は絶縁部材７１を介してハウジング４０に密着している。また、バスバー１３、１４、１７、１８は電動機フロント側（ステータ１の図１２紙面左側）に配置され、バスバー１３、１４、１７、１８群のリング形状部の外周面とハウジング４０との間に絶縁部材７２が配置されている。そして、バスバー１３、１４、１７、１８および絶縁板６５〜６８、７０は絶縁部材７２を介してハウジング４０に圧入され、これにより各バスバー１３、１４、１７、１８の外周面は絶縁部材７２を介してハウジング４０に密着している。すなわち、バスバー１１、１２、１５、１６とバスバー１３、１４、１７、１８とをステータ１および巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４、Ｘ相の巻線を挟んだ反対側に配置している。 (Fourth embodiment)
FIG. 13 is a sectional view showing a four-phase switched reluctance motor having a winding terminal connection structure according to a fourth embodiment of the present invention. As shown in the figure, the bus bars 11, 12, 15, and 16 are stacked in the axial direction of the output shaft 45 with the insulating plates 62 to 64 interposed therebetween, and the insulating plate 61 and the insulating plate 69 are the bus bars 11, 12, 15, 16. The front and rear of the entire group are insulated. The bus bars 13, 14, the X-phase current inflow side bus bar 17, and the X-phase current outflow side bus bar 18 are stacked in the axial direction of the output shaft 45 with the insulating plates 66 to 68 interposed therebetween. Insulates the front and rear of the entire bus bar 13, 14, 17, 18 group. That is, the bus bars 11 and 12, the bus bars 13 and 14, the bus bars 15 and 16, and the bus bars 17 and 18 of the bus bar set are arranged in the closest stacking direction. The bus bars 17 and 18 have a ring shape, and are produced by punching a 2 mm thick electrical copper plate. The bus bars 11, 12, 15, 16 are arranged on the rear side of the motor (right side in FIG. 13 of the stator 1), and between the outer peripheral surface of the ring-shaped portion of the bus bars 11, 12, 15, 16 group and the housing 40. An insulating member 71 is disposed. The bus bars 11, 12, 15, 16 and the insulating plates 61 to 64, 69 are press-fitted into the housing 40 via the insulating member 71, whereby the outer peripheral surfaces of the bus bars 11, 12, 15, 16 are provided with the insulating member 71. Through the housing 40. The bus bars 13, 14, 17, 18 are arranged on the front side of the motor (left side of FIG. 12 of the stator 1), and between the outer peripheral surface of the ring-shaped portion of the bus bars 13, 14, 17, 18 group and the housing 40. An insulating member 72 is disposed. The bus bars 13, 14, 17, 18 and the insulating plates 65 to 68, 70 are press-fitted into the housing 40 via the insulating members 72, whereby the outer peripheral surfaces of the bus bars 13, 14, 17, 18 are connected to the insulating members 72. Through the housing 40. That is, the bus bars 11, 12, 15, 16 and the bus bars 13, 14, 17, 18 are arranged on the opposite side across the stator 1 and the windings U1 to U4, V1 to V4, W1 to W4, and the X-phase winding. doing.

このような巻線の端末結線構造においては、バスバー組のバスバー１１、１２、バスバー１３、１４、バスバー１５、１６、バスバー１７、１８を積層方向直近に配置しているから、バスバー１１、１２間、バスバー１３、１４間、バスバー１５、１６間、バスバー１７、１８間の寄生インダクタンスを低減することがきできるので、電源電圧を効率良く巻線インダクタンスに印加することができる。しかも、バスバー１１、１２のバスバー組およびバスバー１５、１６のバスバー組とバスバー１３、１４のバスバー組およびバスバー１７、１８のバスバー組とをステータ１および巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４、Ｘ相の巻線を挟んだ反対側に配置しているから、巻線Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４、Ｘ相の巻線からバスバー１１〜１８に流入する熱量を分散でき、またハウジング４０におけるバスバー１１〜１８の外周面と密着する箇所の熱集中を分散できるので、放熱効果を向上することができる。 In such a terminal connection structure of windings, the bus bars 11 and 12, the bus bars 13 and 14, the bus bars 15 and 16, and the bus bars 17 and 18 of the bus bar set are arranged in the immediate vicinity of the stacking direction. Since the parasitic inductance between the bus bars 13 and 14, between the bus bars 15 and 16, and between the bus bars 17 and 18 can be reduced, the power supply voltage can be efficiently applied to the winding inductance. Moreover, the bus bar set of the bus bars 11 and 12, the bus bar set of the bus bars 15 and 16, the bus bar set of the bus bars 13 and 14, and the bus bar set of the bus bars 17 and 18 are connected to the stator 1 and the windings U1 to U4, V1 to V4, W1. Since it is arranged on the opposite side across the W4 and X phase windings, the amount of heat flowing into the bus bars 11 to 18 from the windings U1 to U4, V1 to V4, W1 to W4, and the X phase windings can be dispersed. Moreover, since the heat concentration in the portion of the housing 40 that is in close contact with the outer peripheral surfaces of the bus bars 11 to 18 can be dispersed, the heat dissipation effect can be improved.

（第５の実施の形態）
図１４は本発明の第５の実施の形態の巻線の端末結線構造に使用するバスバーの一部を模式的に示す断面図である。図に示すように、厚さ０．５ｍｍの電気用銅板を打ち抜いた薄板状導電部材８１の表面に絶縁塗膜８２が施され、４枚の薄板状導電部材８１が重ねられており、バスバーはリング形状である。そして、バスバーは絶縁部材を介してハウジングに圧入され、これにより各バスバーの外周面は絶縁部材を介してハウジングに密着している。 (Fifth embodiment)
FIG. 14 is a cross-sectional view schematically showing a part of a bus bar used in the winding terminal connection structure according to the fifth embodiment of the present invention. As shown in the figure, an insulating coating 82 is applied to the surface of a thin plate-like conductive member 81 obtained by punching a copper plate for electric use having a thickness of 0.5 mm, and four thin plate-like conductive members 81 are stacked. Ring shape. The bus bar is press-fitted into the housing via an insulating member, whereby the outer peripheral surface of each bus bar is in close contact with the housing via the insulating member.

このようなバスバーを使用した巻線の端末結線構造においては、積層方向に厚みをもつバスバーにおける電流の表皮効果を回避することができ、特に高周波駆動電動機にあって効率が向上するとともに、バスバー自身の発熱も抑えることができる。また、熱はリング形状部の外周部に逃げる構造としているので、絶縁塗膜８２による積層方向の熱抵抗の増加は問題とならない。 In the terminal connection structure of the winding using such a bus bar, the skin effect of the current in the bus bar having a thickness in the stacking direction can be avoided, and the efficiency is improved particularly in the high frequency drive motor, and the bus bar itself The heat generation of can also be suppressed. Further, since the heat escapes to the outer peripheral portion of the ring-shaped portion, an increase in the thermal resistance in the stacking direction due to the insulating coating film 82 does not cause a problem.

なお、上述実施の形態においては、電動機の形式がスイッチト・リラクタンス・モータの場合について説明したが、本発明はこの形式の電動機のステータの巻線の端末結線構造に限定するものではなく、巻線（集中巻き巻線）を用いた全ての電動機のステータの巻線の端末結線構造に適用することができる。また、上述実施の形態においては、導電材料として電気用銅を用いたが、他の導電材料を用いてもよい。 In the above embodiment, the case where the type of the motor is a switched reluctance motor has been described. However, the present invention is not limited to the terminal connection structure of the stator winding of this type of motor. The present invention can be applied to a terminal connection structure of stator windings of all electric motors using wires (concentrated windings). Moreover, in the above-described embodiment, electrical copper is used as the conductive material, but other conductive materials may be used.

第１の実施の形態の巻線の端末結線構造を有するスイッチト・リラクタンス・モータを示す断面図である。It is sectional drawing which shows the switched reluctance motor which has the terminal connection structure of the coil | winding of 1st Embodiment. 図１に示したスイッチト・リラクタンス・モータのステータ部を示す図である。It is a figure which shows the stator part of the switched reluctance motor shown in FIG. 図１、図２に示した巻線の端末結線構造に使用するバスバーを示す図である。It is a figure which shows the bus-bar used for the terminal connection structure of the coil | winding shown in FIG. 1, FIG. 図１、図２に示したスイッチト・リラクタンス・モータの一部を示す図である。It is a figure which shows a part of switched reluctance motor shown in FIG. 1, FIG. 図１、図２に示したスイッチト・リラクタンス・モータの一部を示す図である。It is a figure which shows a part of switched reluctance motor shown in FIG. 1, FIG. バスバーに巻線を直列接続した状態を示す図である。It is a figure which shows the state which connected the coil | winding to the bus bar in series. バスバーに巻線を並列接続した状態を示す図である。It is a figure which shows the state which connected the coil | winding to the bus-bar in parallel. 第２の実施の形態の巻線の端末結線構造に使用するバスバーを示す図である。It is a figure which shows the bus-bar used for the terminal connection structure of the coil | winding of 2nd Embodiment. 図８に示したバスバーを有するスイッチト・リラクタンス・モータの一部を示す図である。It is a figure which shows a part of switched reluctance motor which has a bus-bar shown in FIG. 図８に示したバスバーを有するスイッチト・リラクタンス・モータの一部を示す図である。It is a figure which shows a part of switched reluctance motor which has a bus-bar shown in FIG. 図８に示したバスバーを積層した状態を示す斜視図である。It is a perspective view which shows the state which laminated | stacked the bus-bar shown in FIG. 第３の実施の形態の巻線の端末結線構造を有するスイッチト・リラクタンス・モータを示す断面図である。It is sectional drawing which shows the switched reluctance motor which has the terminal connection structure of the coil | winding of 3rd Embodiment. 第４の実施の形態の巻線の端末結線構造を有するスイッチト・リラクタンス・モータを示す断面図である。It is sectional drawing which shows the switched reluctance motor which has the terminal connection structure of the coil | winding of 4th Embodiment. 第５の実施の形態の巻線の端末結線構造に使用するバスバーの一部を模式的に示す断面図である。It is sectional drawing which shows typically a part of bus bar used for the terminal connection structure of the coil | winding of 5th Embodiment.

Explanation of symbols

１…ステータ１１〜１８…バスバー
２１〜２６…バスバー３０…絶縁部材
３１〜３７…絶縁板４０…ハウジング
６１〜７０…絶縁板７１、７２…絶縁部材
８１…薄板状導電部材８２…絶縁塗膜
９１…第１の貫通穴９２…第２の貫通穴
９３…突出部
Ｕ１〜Ｕ４、Ｖ１〜Ｖ４、Ｗ１〜Ｗ４…巻線
Ｕ１Ｔ〜Ｕ４Ｔ、Ｖ１Ｔ〜Ｖ４Ｔ、Ｗ１Ｔ〜Ｗ４Ｔ…ティース
Ｕ１Ｐ〜Ｕ４Ｐ、Ｖ１Ｐ〜Ｖ４Ｐ、Ｗ１Ｐ〜Ｗ４Ｐ…巻線端
Ｕ１Ｎ〜Ｕ４Ｎ、Ｖ１Ｎ〜Ｖ４Ｎ、Ｗ１Ｎ〜Ｗ４Ｎ…巻線端 DESCRIPTION OF SYMBOLS 1 ... Stator 11-18 ... Bus bar 21-26 ... Bus bar 30 ... Insulating member 31-37 ... Insulating plate 40 ... Housing 61-70 ... Insulating plate 71, 72 ... Insulating member
81 ... Thin plate-like conductive member 82 ... Insulating coating
91 ... 1st through hole 92 ... 2nd through hole
93 ... Projection U1-U4, V1-V4, W1-W4 ... Windings U1T-U4T, V1T-V4T, W1T-W4T ... Teeth U1P-U4P, V1P-V4P, W1P-W4P ... Winding ends U1N-U4N, V1N to V4N, W1N to W4N ... Winding ends

Claims

In the terminal connection structure of the winding of the stator of the electric motor configured by using one or more windings wound around one tooth,
Connecting the winding ends of the windings to a plurality of bus bars made of a ring-shaped conductive material,
Laminating a plurality of the bus bars in the axial direction of the output shaft of the motor via an insulating plate,
A terminal connection structure for windings, wherein the outer peripheral surfaces of the plurality of bus bars are in close contact with the housing through insulating members.

A first through hole corresponding to a cross-sectional shape of the winding end is formed at a location corresponding to the position of the winding end connected to the bus bar of the bus bar, and the winding end is connected to the first through hole. The second through hole larger than the cross-sectional shape of the winding end is formed at a location corresponding to the winding end of the bus bar not connected to the bus bar. Winding terminal connection structure.

The protruding portion is formed at a position corresponding to the position of the winding end connected to the bus bar on the inner periphery of the bus bar, and the winding tip is connected to the protruding portion. Winding terminal connection structure.

4. The winding terminal connection structure according to claim 1, wherein a plurality of windings of the same phase are connected in parallel.

One bus phase is connected to the bus bar to which one winding tip having the same energization direction of the plurality of windings in the same phase is connected to the bus bar to which the other winding tip of the plurality of windings in the same phase is connected. 5. The terminal connection structure of a winding according to claim 4, wherein a bus bar set is formed, and the bus bars of the bus bar set are arranged in the laminating direction closest to each other via an insulating plate.

One bus phase is connected to the bus bar to which one winding tip having the same energization direction of the plurality of windings in the same phase is connected to the bus bar to which the other winding tip of the plurality of windings in the same phase is connected. 5. The terminal connection structure of a winding according to claim 4, wherein a bus bar set is formed and the bus bars of the bus bar set are arranged on opposite sides of the stator and the winding, respectively.

One bus phase is connected to the bus bar to which one winding tip having the same energization direction of the plurality of windings in the same phase is connected to the bus bar to which the other winding tip of the plurality of windings in the same phase is connected. 6. A winding terminal connection structure according to claim 4 or 5, wherein a half bus bar set is configured, and half of the even number of bus bar sets are arranged on opposite sides of the stator and the winding, respectively. .

The winding terminal connection structure according to any one of claims 1 to 7, wherein the bus bar is formed by stacking a plurality of thin plate-like conductive members having an insulating coating on the surface.