JP2014087101A - Stator of dynamo-electric machine - Google Patents

Stator of dynamo-electric machine Download PDF

Info

Publication number
JP2014087101A
JP2014087101A JP2012232070A JP2012232070A JP2014087101A JP 2014087101 A JP2014087101 A JP 2014087101A JP 2012232070 A JP2012232070 A JP 2012232070A JP 2012232070 A JP2012232070 A JP 2012232070A JP 2014087101 A JP2014087101 A JP 2014087101A
Authority
JP
Japan
Prior art keywords
coil
slot
thickness
stator
dielectric constant
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.)
Pending
Application number
JP2012232070A
Other languages
Japanese (ja)
Inventor
Hiroki Kato
弘樹 加藤
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor 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 Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP2012232070A priority Critical patent/JP2014087101A/en
Priority to PCT/IB2013/002204 priority patent/WO2014060808A2/en
Publication of JP2014087101A publication Critical patent/JP2014087101A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/32—Windings characterised by the shape, form or construction of the insulation
    • H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
    • H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

PROBLEM TO BE SOLVED: To enhance the space factor of a coil in a slot while ensuring the insulation performance at the coil end and in the slot, by setting the thickness of insulation coating of the coil appropriately in the stator of a dynamo electric machine.SOLUTION: The stator 10 of a dynamo electric machine includes a plurality of slots 16 arranged in the circumferential direction of a stator core 12, slot insulators 34 arranged along the inner wall of the slot, and a coil 20 inserted into the slots 16 and wound, and having slot 16 conductors 22 and coil end conductors 24, and insulation coatings 30, 32 of a coil covering the slot conductors 22 and coil end conductors 24. The insulation coatings 30, 32 of a coil have a dielectric constant different from that of the slot insulators 34, and a thickness different from that of the slot insulators 34.

Description

本発明は、回転電機の固定子に係り、特に、絶縁被膜を有するコイルが巻回される回転電機の固定子に関する。   The present invention relates to a stator of a rotating electric machine, and more particularly to a stator of a rotating electric machine around which a coil having an insulating coating is wound.

回転電機の固定子は、ステータコアのスロットを通って絶縁被膜を有するコイルが巻回され、ステータコアの軸方向に突き出たコイルの部分はコイルエンドと呼ばれる。   In a stator of a rotating electric machine, a coil having an insulating coating is wound through a slot of a stator core, and a portion of the coil protruding in the axial direction of the stator core is called a coil end.

例えば、特許文献１には、回転電機のステータコイルにおいて、コイルエンド部分の絶縁層とスロット部分の絶縁層の間で、絶縁層の厚さまたは絶縁材料が異なるものが開示されている。   For example, Patent Document 1 discloses a stator coil of a rotating electrical machine in which the insulating layer has a different thickness or insulating material between the insulating layer in the coil end portion and the insulating layer in the slot portion.

また、特許文献２には、回転電機に用いられる絶縁被膜導線に関し、部分放電開始電圧（ＰＤＩＶ）が（絶縁被膜の厚さｔ／絶縁被膜の誘電率ε）の０．４６乗に比例することが述べられている。   Further, in Patent Document 2, regarding an insulating film conductor used in a rotating electrical machine, a partial discharge start voltage (PDIV) is proportional to the 0.46th power of (thickness t of insulating film / dielectric constant ε of insulating film). Is stated.

特開２００８−２３６９２４号公報JP 2008-236924 A 特開２０１２−１１３８３６号公報JP 2012-1113836 A

回転電機の固定子のコイルは、コイルエンドでは異相コイルが隣接し、スロット内では同相コイルが隣接する。異相コイル間の電圧差の方が同相コイル間の電圧差より大きいので、絶縁性を考えると、コイルの絶縁被膜は、コイルエンドにおける絶縁性を確保する厚さが必要である。   The stator coil of the rotating electrical machine has a different-phase coil adjacent to the coil end and an in-phase coil adjacent to the slot. Since the voltage difference between the different-phase coils is larger than the voltage difference between the in-phase coils, considering the insulation, the coil insulation film needs to have a thickness that ensures the insulation at the coil end.

コイルの絶縁被膜の厚さをスロット内とコイルエンドとで同じとすると、スロット内では過剰に厚い絶縁被膜となり、スロット内のコイルの占積率を低下させ、回転電機の銅損等が増加する。   If the thickness of the coil insulation film is the same in the slot and in the coil end, the insulation film becomes excessively thick in the slot, reducing the space factor of the coil in the slot and increasing the copper loss of the rotating electrical machine. .

本発明の目的は、コイルの絶縁被膜の厚さを適切に設定した回転電機の固定子を提供することである。他の目的は、コイルエンドとスロット内における絶縁性能を確保しながら、スロット内のコイルの占積率を向上できる回転電機の固定子を提供することである。以下の手段は、上記目的の少なくとも１つに貢献する。   The objective of this invention is providing the stator of the rotary electric machine which set the thickness of the insulating film of the coil appropriately. Another object is to provide a stator of a rotating electrical machine that can improve the space factor of the coil in the slot while ensuring the insulation performance in the coil end and the slot. The following means contribute to at least one of the above objects.

本発明に係る回転電機の固定子は、ステータコアの周方向に沿って複数配置されるスロットと、スロット内壁に沿って配置されるスロット絶縁体と、スロットに挿入されて巻回されるコイルであって、コイル導体とコイル導体を被覆するコイル絶縁被膜とを有するコイルと、を備え、コイル絶縁被膜は、スロット絶縁体の誘電率と異なる誘電率と、スロット絶縁体の厚さと異なる厚さとを有することを特徴とする。   A stator of a rotating electrical machine according to the present invention includes a plurality of slots arranged along a circumferential direction of a stator core, a slot insulator arranged along an inner wall of the slot, and a coil inserted into the slot and wound. And a coil having a coil conductor and a coil insulation film covering the coil conductor, the coil insulation film having a dielectric constant different from that of the slot insulator and a thickness different from the thickness of the slot insulator. It is characterized by that.

また、本発明に係る回転電機の固定子において、コイル絶縁被膜は、誘電率がスロット絶縁体の誘電率よりも大きく、厚さがスロット絶縁体よりも薄いことが好ましい。   In the stator of the rotating electrical machine according to the present invention, the coil insulating film preferably has a dielectric constant larger than that of the slot insulator and thinner than that of the slot insulator.

また、本発明に係る回転電機の固定子において、コイル絶縁被膜は、誘電率がスロット絶縁体の誘電率よりも小さく、厚さがスロット絶縁体よりも厚いことが好ましい。   In the stator of the rotating electric machine according to the present invention, the coil insulating film preferably has a dielectric constant smaller than that of the slot insulator and thicker than that of the slot insulator.

また、本発明に係る回転電機の固定子において、コイルエンドのコイル絶縁被膜よりもスロット内のコイル絶縁被膜が薄いことが好ましい。   In the stator of the rotating electrical machine according to the present invention, it is preferable that the coil insulating film in the slot is thinner than the coil insulating film at the coil end.

上記構成により、回転電機の固定子は、コイル絶縁被膜の誘電率とスロット絶縁体の誘電率の大小に応じて、コイル絶縁被膜の厚さとスロット絶縁体の厚さを異なるものとする。このように、誘電率を考慮して、コイル絶縁被膜の厚さとスロット絶縁体の厚さを適切に変更でき、これによって、絶縁性能を確保するようにコイルの絶縁被膜の厚さを適切な厚さに設定できる。   With the above configuration, the stator of the rotating electrical machine is configured such that the thickness of the coil insulating film and the thickness of the slot insulator differ depending on the dielectric constant of the coil insulating film and the dielectric constant of the slot insulator. As described above, the thickness of the coil insulating film and the thickness of the slot insulator can be appropriately changed in consideration of the dielectric constant, and thereby the thickness of the coil insulating film can be changed to an appropriate thickness so as to ensure the insulation performance. Can be set.

特許文献２に示されるように、部分放電開始電圧（ＰＤＩＶ）は（絶縁被膜の厚さｔ／絶縁被膜の誘電率ε）の０．４６乗に比例する。例として誘電率が２倍になると絶縁性能は０．７２倍になる。したがって、総絶縁厚さ＝（コイル絶縁被膜厚さ＋スロット絶縁体厚さ）は、同じ絶縁性能の場合、誘電率が小さい材料を多く用いた方が薄くできる。総絶縁厚さが薄くなれば、スロット内のコイルの占積率が向上する。   As shown in Patent Document 2, the partial discharge start voltage (PDIV) is proportional to 0.46 of (thickness t of insulating film / dielectric constant ε of insulating film). For example, when the dielectric constant is doubled, the insulation performance is 0.72 times. Therefore, the total insulation thickness = (coil insulation film thickness + slot insulator thickness) can be reduced by using more materials having a low dielectric constant in the case of the same insulation performance. If the total insulation thickness is reduced, the space factor of the coil in the slot is improved.

上記構成によれば、回転電機の固定子において、コイル絶縁被膜の誘電率がスロット絶縁体の誘電率より大きいときは、コイル絶縁被膜の方をスロット絶縁体よりも薄くする。逆に、コイル絶縁被膜の誘電率がスロット絶縁体の誘電率より小さいときは、コイル絶縁被膜の方をスロット絶縁体よりも厚くする。このようにすることで、総絶縁厚さ＝（コイル絶縁被膜厚さ＋スロット絶縁体厚さ）を小さくでき、スロット内のコイルの占積率を向上できる。   According to the above configuration, in the stator of the rotating electrical machine, when the dielectric constant of the coil insulating film is larger than the dielectric constant of the slot insulator, the coil insulating film is made thinner than the slot insulator. On the contrary, when the dielectric constant of the coil insulating film is smaller than the dielectric constant of the slot insulator, the coil insulating film is made thicker than the slot insulator. By doing in this way, total insulation thickness = (coil insulation film thickness + slot insulator thickness) can be made small, and the space factor of the coil in a slot can be improved.

また、上記構成によれば、コイル絶縁被膜の誘電率がスロット絶縁体の誘電率より大きいときは、コイルエンドのコイル絶縁被膜よりもスロット内のコイル絶縁被膜を薄くする。スロット内においては、コイルの絶縁被膜の誘電率が大きいので、コイルの絶縁被膜をスロット絶縁体より薄くしても絶縁性能を確保できる。コイルエンドではスロット絶縁体がないので、スロット内よりもコイルの絶縁被膜を厚くする。このようにすることで、コイルエンドもスロット内も絶縁性能を確保しながら、スロット内のコイルの占積率を向上できる。   Further, according to the above configuration, when the dielectric constant of the coil insulating film is larger than the dielectric constant of the slot insulator, the coil insulating film in the slot is made thinner than the coil insulating film at the coil end. Since the dielectric constant of the insulating film of the coil is large in the slot, the insulating performance can be ensured even if the insulating film of the coil is thinner than the slot insulator. Since there is no slot insulator at the coil end, the coil insulation film is made thicker than in the slot. By doing in this way, the space factor of the coil in a slot can be improved, ensuring insulation performance in a coil end and a slot.

本発明の実施の形態の回転電機の固定子において、コイル絶縁被膜とスロット絶縁体を示す図である。（ａ）は回転電機の固定子の斜視図、（ｂ）はスロットに巻回されたコイルの絶縁被膜とスロットのスロット絶縁体を示す断面図である。It is a figure which shows a coil insulation film and a slot insulator in the stator of the rotary electric machine of embodiment of this invention. (A) is a perspective view of a stator of a rotating electrical machine, (b) is a cross-sectional view showing an insulating film of a coil wound around a slot and a slot insulator of the slot. 図１のＡ−Ａ線におけるスロット内コイルの断面図である。It is sectional drawing of the coil in a slot in the AA of FIG. 図１のＢ−Ｂ線におけるコイルエンドの断面図である。It is sectional drawing of the coil end in the BB line of FIG. 本発明の実施の形態の回転電機の固定子において、スロット内のコイル絶縁被膜とスロット絶縁体を示す図である。In the stator of the rotating electrical machine according to the embodiment of the present invention, FIG.

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。以下では、回転電機として、三相同期型を述べるが、これは説明のための例示であって、コイルが巻回される回転電機であればよい。以下では、導体セグメントコイルでコイルを形成するものとして述べるが、これは説明のための例示であって、導体線をスロットに通してティースに巻回する巻線コイルであってもよい。コイルの断面形状を矩形として述べるが、矩形形状には角部が適当に丸みを有するものも含む。また、矩形形状は説明のための例示であって、断面が円形形状、楕円形状等であってもよい。   Embodiments according to the present invention will be described below in detail with reference to the drawings. In the following, a three-phase synchronous type will be described as a rotating electrical machine, but this is an example for explanation, and any rotating electrical machine around which a coil is wound may be used. In the following description, it is assumed that the coil is formed by a conductor segment coil. However, this is an illustrative example, and a winding coil in which a conductor wire is wound around a tooth through a slot may be used. Although the cross-sectional shape of the coil is described as a rectangle, the rectangular shape includes one having corners appropriately rounded. Further, the rectangular shape is an example for explanation, and the cross section may be a circular shape, an elliptical shape, or the like.

以下で述べるステータコアのスロットの数、１つのスロットに配置されるコイルの数等は説明のための例示であって、回転電機の固定子の仕様に応じ、適宜変更が可能である。   The number of stator core slots described below, the number of coils arranged in one slot, and the like are illustrative examples, and can be appropriately changed according to the specifications of the stator of the rotating electrical machine.

以下では、全ての図面において一または対応する要素には同一の符号を付し、重複する説明を省略する。   Hereinafter, in all the drawings, one or the corresponding element is denoted by the same reference numeral, and redundant description is omitted.

図１は、回転電機の固定子１０を示す図である。回転電機は、三相同期型回転電機である。以下では、特に断らない限り、回転電機の固定子１０を、単に固定子１０と呼ぶことにする。図１（ａ）は、固定子１０のステータコア１２にコイル２０が巻回される様子を示す斜視図、（ｂ）は、コイル２０のスロット内とコイルエンドにおける絶縁被膜と、スロットの内壁に設けられるスロット絶縁体を示す断面図である。（ｂ）には、ステータコア１２の周方向と軸方向を示した。   FIG. 1 is a view showing a stator 10 of a rotating electrical machine. The rotating electrical machine is a three-phase synchronous rotating electrical machine. Hereinafter, unless otherwise specified, the stator 10 of the rotating electrical machine is simply referred to as the stator 10. FIG. 1A is a perspective view showing a state in which the coil 20 is wound around the stator core 12 of the stator 10, and FIG. 1B is an insulating coating in the slot of the coil 20 and the coil end and on the inner wall of the slot. It is sectional drawing which shows the slot insulator manufactured. In (b), the circumferential direction and axial direction of the stator core 12 are shown.

固定子１０は、図示されていない回転子と組み合わせて回転電機を構成し、コイルに通電することで回転子と電磁作用的に協働して回転子を回転させ、回転子の回転軸にトルクを出力させる。   The stator 10 constitutes a rotating electrical machine in combination with a rotor (not shown), and when the coil is energized, it cooperates with the rotor in an electromagnetic action to rotate the rotor, and torque is applied to the rotating shaft of the rotor. Is output.

固定子１０は、ステータコア１２と、ステータコア１２の周方向に沿って配置される複数のティース１４と、隣接するティース１４の間の空間であるスロット１６と、スロット１６を通って巻回されるコイル２０を備える。   The stator 10 includes a stator core 12, a plurality of teeth 14 arranged along the circumferential direction of the stator core 12, a slot 16 that is a space between adjacent teeth 14, and a coil wound through the slot 16. 20.

ステータコア１２は、内周側に複数のティース１４が配置される円環状の磁性体部材である。かかるステータコア１２は、所定の形状の電磁鋼板を複数枚積層して形成される。   The stator core 12 is an annular magnetic member in which a plurality of teeth 14 are disposed on the inner peripheral side. The stator core 12 is formed by laminating a plurality of electromagnetic steel plates having a predetermined shape.

コイル２０は、導体セグメントコイルを用いて形成される。導体セグメントコイルは、断面が矩形形状の導体をＵ字状に曲げたもので、表面は絶縁被膜が設けられる。導体の材料としては高導電性の金属を用いることができる。高導電性の金属としては銅等を用いることができる。絶縁被膜としては、ポリアミドイミドのエナメル被覆が用いられる。絶縁被膜の厚さは、固定子１０の絶縁仕様等で定められる。厚さの一例を挙げると、約３０〜５０μｍである。絶縁被膜に用いられるエナメル被覆としては、ポリエステルイミド、ポリイミド、ポリエステル、ホルマール等を用いてもよい。   The coil 20 is formed using a conductor segment coil. The conductor segment coil is formed by bending a conductor having a rectangular cross section into a U shape, and the surface is provided with an insulating coating. A highly conductive metal can be used as the conductor material. Copper or the like can be used as the highly conductive metal. As the insulating coating, an enamel coating of polyamideimide is used. The thickness of the insulating coating is determined by the insulation specifications of the stator 10 and the like. An example of the thickness is about 30 to 50 μm. As the enamel coating used for the insulating coating, polyesterimide, polyimide, polyester, formal, or the like may be used.

導体セグメントコイルを用いてコイルを形成するには次のように行われる。導体セグメントコイルの２つの脚部の先端部を、ステータコア１２の周方向に沿って所定のスロット間隔で離れた２つのスロット１６に、ステータコア１２の軸方向の一方側から挿入する。図１では、Ｕ相、Ｖ相、Ｗ相の三相にあわせ、６つのスロット間隔だけ離れた２つのスロット１６が用いられる。この２つのスロット１６に導体セグメントコイルの２つの脚部の先端がステータコア１２の軸方向の一方側から挿入される。図１では、スタータコア１２の軸方向の一方側は、紙面に沿って上側である。   Forming a coil using a conductor segment coil is performed as follows. The leading ends of the two leg portions of the conductor segment coil are inserted from two axial sides of the stator core 12 into two slots 16 that are spaced apart by a predetermined slot interval along the circumferential direction of the stator core 12. In FIG. 1, two slots 16 separated by six slot intervals are used in accordance with the three phases of the U phase, the V phase, and the W phase. The ends of the two leg portions of the conductor segment coil are inserted into the two slots 16 from one side of the stator core 12 in the axial direction. In FIG. 1, one side of the starter core 12 in the axial direction is the upper side along the paper surface.

ステータコア１２の軸方向の一方側からスロット１６に挿入された２つの脚部の先端部は、ステータコア１２の軸方向の他方側で突き出る。突き出た先端部は、ステータコア１２の軸方向の他方側で曲げられ、同様にスロット１６に挿入された他の導体セグメントコイルの先端部と溶接等で接続される。他の導体セグメントコイルの先端部との接続は、固定子１０の巻線仕様に応じて行われる。このようにして、複数の導体セグメントコイルがステータコア１２に組付けられ、互いに接続されて、コイル２０を形成する。   The tip portions of the two leg portions inserted into the slot 16 from one axial side of the stator core 12 protrude on the other axial side of the stator core 12. The protruding tip portion is bent on the other side in the axial direction of the stator core 12 and is similarly connected to the tip portion of another conductor segment coil inserted into the slot 16 by welding or the like. Connection with the tip of the other conductor segment coil is made according to the winding specification of the stator 10. In this way, a plurality of conductor segment coils are assembled to the stator core 12 and connected to each other to form the coil 20.

複数の導体セグメントコイルがステータコア１２に組付けられてコイル２０を形成した状態は、ステータコア１２の軸方向の一方側に複数のＵ字状の部分が配列され、他方側に曲げられて接続された複数の先端部が配列される。巻線コイルがステータコア１２の軸方向に突き出した部分は、コイルエンドと呼ばれる。複数のＵ字状の部分が配列された部分が、ステータコア１２の軸方向の一方側に突き出した一方側コイルエンドで、複数の曲げられた先端部が配列された部分が、ステータコア１２の軸方向の他方側に突き出した他方側コイルエンドである。   In the state in which a plurality of conductor segment coils are assembled to the stator core 12 to form the coil 20, a plurality of U-shaped portions are arranged on one side in the axial direction of the stator core 12 and are bent and connected to the other side. A plurality of tip portions are arranged. A portion where the winding coil protrudes in the axial direction of the stator core 12 is called a coil end. A portion where a plurality of U-shaped portions are arranged is a one-side coil end protruding to one side in the axial direction of the stator core 12, and a portion where a plurality of bent tip portions are arranged is the axial direction of the stator core 12. It is the other side coil end which protruded to the other side.

図１では、コイル２０がスロット内部分とコイルエンド部分とを区別している。スロット内部分は、スロット内の導体２２とスロット内絶縁被膜３０で構成され、コイルエンド部分は、コイルエンドの導体２４とコイルエンド絶縁被膜３２で構成される。   In FIG. 1, the coil 20 distinguishes between the slot inner portion and the coil end portion. The in-slot portion is constituted by the conductor 22 in the slot and the in-slot insulating coating 30, and the coil end portion is constituted by the coil end conductor 24 and the coil end insulating coating 32.

図１で示されるスロット絶縁体３４は、ティース１４の内壁面に沿って設けられる絶縁体である。スロット絶縁体３４は、絶縁紙、プラスチックシート等が用いられる。コイル２０の絶縁被膜と同様の材質の絶縁体を用いることもできる。   The slot insulator 34 shown in FIG. 1 is an insulator provided along the inner wall surface of the tooth 14. As the slot insulator 34, an insulating paper, a plastic sheet or the like is used. An insulator made of the same material as the insulating coating of the coil 20 can also be used.

図２は、図１のＡ−Ａ線の断面図で、コイル２０のスロット内部分の断面図である。スロット内絶縁被膜３０の厚さは、ステータコア１２の周方向に沿った厚さがｔ1で、ステータコア１２の径方向に沿った厚さがｔ2である。ステータコア１２の周方向と径方向は図２に示した。 FIG. 2 is a cross-sectional view taken along the line AA in FIG. The thickness of the slot insulation film 30, the thickness along the circumferential direction of the stator core 12 at t 1, the thickness in the radial direction of the stator core 12 is t 2. The circumferential direction and radial direction of the stator core 12 are shown in FIG.

図３は、図１のＢ−Ｂ線の断面図で、コイル２０のコイルエンド部分の断面図である。コイルエンド絶縁被膜３２の厚さは、ステータコア１２の周方向に沿った厚さがｔ3で、ステータコア１２の径方向に沿った厚さがｔ4である。 FIG. 3 is a cross-sectional view taken along line BB in FIG. 1 and is a cross-sectional view of a coil end portion of the coil 20. The coil end insulating film 32 has a thickness t 3 along the circumferential direction of the stator core 12 and a thickness t 4 along the radial direction of the stator core 12.

従来技術では、コイル２０において、スロット内の導体２２とコイルエンド導体２４の断面形状は同じである。また、コイル絶縁被膜の厚さもコイル２０の全体に渡って同じで、ｔ1＝ｔ2＝ｔ3＝ｔ4である。以下では、コイル絶縁被膜の厚さを変更することで、スロット１６内のコイル占積率を向上できることを説明する。 In the prior art, in the coil 20, the cross-sectional shapes of the conductor 22 in the slot and the coil end conductor 24 are the same. Further, the thickness of the coil insulating film is the same throughout the coil 20, and t 1 = t 2 = t 3 = t 4 . Hereinafter, it will be described that the coil space factor in the slot 16 can be improved by changing the thickness of the coil insulating coating.

スロット１６内について、スロット内絶縁被膜３０は、誘電率がスロット絶縁体３４の誘電率と異なり、厚さｔ1，ｔ2が、スロット絶縁体３４の厚さｔ5（図４参照）と異なる。このように、スロット内絶縁被膜３０とスロット絶縁体３４の間で誘電率と厚さを異ならせているのは、特許文献２で述べられているように、部分放電開始電圧（ＰＤＩＶ）は（絶縁被膜の厚さｔ／絶縁被膜の誘電率ε）の０．４６乗に比例することを利用して、スロット１６内のコイル２０の占積率を向上させるためである。 Regarding the inside of the slot 16, the insulating film 30 in the slot has a dielectric constant different from that of the slot insulator 34, and the thicknesses t 1 and t 2 are different from the thickness t 5 of the slot insulator 34 (see FIG. 4). . In this way, the dielectric constant and the thickness are different between the in-slot insulating film 30 and the slot insulator 34 because, as described in Patent Document 2, the partial discharge start voltage (PDIV) is ( This is because the space factor of the coil 20 in the slot 16 is improved by utilizing the fact that it is proportional to the 0.46th of the thickness t of the insulating coating / the dielectric constant ε) of the insulating coating.

上記の式の計算例として、厚さｔを同じで誘電率εが２倍になると絶縁性能は０．７２倍になる。誘電率εを同じとして厚さｔを１／２にすると絶縁性能は１．４４倍になる。誘電率εを２倍、厚さｔを１／２にすると絶縁性能は約２倍になり、誘電率εを１／２、厚さｔを２倍にすると絶縁性能は約１／２になる。したがって、総絶縁厚さ＝（コイル絶縁被膜厚さ＋スロット絶縁体厚さ）は、同じ絶縁性能の場合、誘電率εが小さい材料を多く用いた方が薄くできる。総絶縁厚さが薄くなれば、スロット内のコイルの占積率が向上する。   As a calculation example of the above formula, when the thickness t is the same and the dielectric constant ε is doubled, the insulation performance is 0.72 times. When the dielectric constant ε is the same and the thickness t is halved, the insulation performance is 1.44 times. When the dielectric constant ε is doubled and the thickness t is halved, the insulation performance is about twice, and when the dielectric constant ε is ½ and the thickness t is doubled, the insulation performance is about ½. . Therefore, the total insulation thickness = (coil insulation film thickness + slot insulator thickness) can be reduced by using more materials having a small dielectric constant ε for the same insulation performance. If the total insulation thickness is reduced, the space factor of the coil in the slot is improved.

すなわち、スロット内絶縁被膜３０の誘電率がスロット絶縁体３４の誘電率よりも大きい場合は、スロット内絶縁被膜３０の厚さｔ1，ｔ2をスロット絶縁体３４の厚さｔ5よりも薄くする。図４は、スロット内絶縁被膜３０の誘電率がスロット絶縁体３４の誘電率よりも大きい場合の１つのスロット１６における断面図である。ここで、スロット絶縁体３４の厚さｔ5よりも、スロット内絶縁被膜３０の厚さｔ1，ｔ2が薄く示されている。ｔ1，ｔ2は同じ厚さとしてよいが、図４でスロット１６の最も外径側で、他のコイル２０と隣接せずスロット絶縁体３４と対向するスロット内絶縁被膜３０の厚さｔ2は、ｔ1よりも薄くしてもよい。この部分に印加される電圧は、コイル２０の導体２２とティース１４の間の電圧で、隣接するコイル２０の間の同相間の電圧より低いからである。 That is, when the dielectric constant of the in-slot insulating film 30 is larger than the dielectric constant of the slot insulator 34, the thicknesses t 1 and t 2 of the in-slot insulating film 30 are made thinner than the thickness t 5 of the slot insulator 34. To do. FIG. 4 is a cross-sectional view of one slot 16 when the dielectric constant of the in-slot insulating film 30 is larger than the dielectric constant of the slot insulator 34. Here, the thicknesses t 1 and t 2 of the in-slot insulating coating 30 are shown thinner than the thickness t 5 of the slot insulator 34. t 1, t 2 is good as the same thickness, the most outer side of the slot 16 in Figure 4, the thickness t 2 of the slot insulating film 30 facing the slot insulator 34 not adjacent to another coil 20 May be thinner than t 1 . This is because the voltage applied to this portion is a voltage between the conductor 22 of the coil 20 and the teeth 14 and is lower than the voltage between the common phases between adjacent coils 20.

逆に、スロット内絶縁被膜３０の誘電率がスロット絶縁体３４の誘電率よりも小さい場合は、スロット絶縁体３４の厚さｔ5をスロット内絶縁被膜３０の厚さｔ1，ｔ2よりも薄くする。換言すれば、この場合は、スロット内絶縁被膜３０の厚さｔ1，ｔ2をスロット絶縁体３４の厚さｔ5よりも厚くする。 Conversely, when the dielectric constant of the in-slot insulating film 30 is smaller than the dielectric constant of the slot insulator 34, the thickness t 5 of the slot insulator 34 is set to be greater than the thicknesses t 1 and t 2 of the in-slot insulating film 30. make it thin. In other words, in this case, the thicknesses t 1 and t 2 of the in-slot insulating coating 30 are made thicker than the thickness t 5 of the slot insulator 34.

このようにすることで、スロット１６における絶縁性能を同じとして、総絶縁厚さ＝（コイル絶縁被膜厚さ＋スロット絶縁体厚さ）を小さくできる。これによって、スロット１６内の絶縁性能を確保しながら、スロット１６内のコイル２０の占積率が向上する。   By doing in this way, the insulation performance in the slot 16 is made the same, and total insulation thickness = (coil insulation film thickness + slot insulator thickness) can be reduced. Thus, the space factor of the coil 20 in the slot 16 is improved while ensuring the insulation performance in the slot 16.

スロット１６内のコイル２０は、同相巻線が隣接するが、コイルエンドのコイル２０は、異相巻線が隣接するので、スロット１６内の絶縁性能よりも高い絶縁性能が要求される。コイルエンドではスロット絶縁体３４がないので、コイルエンド絶縁被膜３２の厚さｔ3，ｔ4の厚さを、スロット内絶縁被膜３０の厚さｔ1，ｔ2より厚くする。ｔ3，ｔ4は同じ厚さとしてよい。これによって、コイルエンドにおける絶縁性能も確保しながら、スロット１６内のコイル２０の占積率を向上させることができる。 The coil 20 in the slot 16 is adjacent to the in-phase winding, but the coil 20 at the coil end is adjacent to the different-phase winding, so that an insulation performance higher than the insulation performance in the slot 16 is required. Since there is no slot insulator 34 at the coil end, the thicknesses t 3 and t 4 of the coil end insulating film 32 are made thicker than the thicknesses t 1 and t 2 of the in-slot insulating film 30. t 3 and t 4 may have the same thickness. Thereby, the space factor of the coil 20 in the slot 16 can be improved while ensuring the insulation performance at the coil end.

設定の手順の１つの例を示すと、コイルエンドにおける絶縁性能を満たすように、コイルエンド絶縁被膜３２の誘電率と厚さｔ3，ｔ4を決める。次に、スロット１６内における絶縁性能を満たすように、スロット内絶縁被膜３０の厚さｔ1，ｔ2を決める。誘電率は同じとする。スロット１６内における絶縁性能の要求は、コイルエンドにおける絶縁性能の要求よりも緩やかであるので、ｔ1，ｔ2はｔ3，ｔ4よりも薄くできる。これにより、スロット１６内のコイル２０の占積率が向上する。 As an example of the setting procedure, the dielectric constant and the thicknesses t 3 and t 4 of the coil end insulating coating 32 are determined so as to satisfy the insulating performance at the coil end. Next, the thicknesses t 1 and t 2 of the insulating coating 30 in the slot are determined so as to satisfy the insulating performance in the slot 16. The dielectric constant is the same. Since the requirement for insulation performance in the slot 16 is more gradual than the requirement for insulation performance at the coil end, t 1 and t 2 can be made thinner than t 3 and t 4 . Thereby, the space factor of the coil 20 in the slot 16 improves.

このときに、スロット絶縁体３４の誘電率を、スロット内絶縁被膜３０の誘電率と異なるものにする。そして、スロット１６内における絶縁性能を満たすように、総絶縁厚さ＝（コイル絶縁被膜厚さ＋スロット絶縁体厚さ）を算出しなおす。例えば、スロット絶縁体３４の誘電率を、スロット内絶縁被膜３０の誘電率よりも小さく設定すると、スロット絶縁体３４の厚さｔ5をスロット内絶縁被膜３０の厚さｔ1，ｔ2より厚くし、スロット内絶縁被膜３０の厚さｔ1，ｔ2をさらに薄くして、総絶縁厚さを小さくできる。スロット絶縁体３４の誘電率を、スロット内絶縁被膜３０の誘電率よりも大きくしても、スロット絶縁体３４の厚さｔ5をスロット内絶縁被膜３０の厚さｔ1，ｔ2より薄くし、スロット内絶縁被膜３０の厚さｔ1，ｔ2を厚くすることで、総絶縁厚さを小さくできる。 At this time, the dielectric constant of the slot insulator 34 is made different from that of the insulating coating 30 in the slot. Then, the total insulation thickness = (coil insulation film thickness + slot insulator thickness) is recalculated so as to satisfy the insulation performance in the slot 16. For example, when the dielectric constant of the slot insulator 34 is set to be smaller than the dielectric constant of the in-slot insulating film 30, the thickness t 5 of the slot insulator 34 is thicker than the thicknesses t 1 and t 2 of the in-slot insulating film 30. In addition, the thickness t 1 and t 2 of the insulating coating 30 in the slot can be further reduced to reduce the total insulating thickness. Even if the dielectric constant of the slot insulator 34 is larger than the dielectric constant of the insulating film 30 in the slot, the thickness t 5 of the slot insulator 34 is made thinner than the thicknesses t 1 and t 2 of the insulating film 30 in the slot. The total insulation thickness can be reduced by increasing the thicknesses t 1 and t 2 of the insulating coating 30 in the slot.

これにより、スロット１６内のコイル２０の占積率がさらに向上し、ステータコア１２の全体も小型化する。   As a result, the space factor of the coil 20 in the slot 16 is further improved, and the entire stator core 12 is also downsized.

１０ 回転電機の固定子、１２ ステータコア、１４ ティース、１６ スロット、２０ コイル、２２，２４ 導体、３０ （コイルの）スロット内絶縁被膜、３２ （コイルの）コイルエンド絶縁被膜、３４ スロット絶縁体。   DESCRIPTION OF SYMBOLS 10 Stator of rotary electric machine, 12 Stator core, 14 teeth, 16 slots, 20 coils, 22, 24 conductors, 30 (coil) insulating film in slot, 32 (coil) coil end insulating film, 34 slot insulator

Claims (4)

ステータコアの周方向に沿って複数配置されるスロットと、
スロット内壁に沿って配置されるスロット絶縁体と、
スロットに挿入されて巻回されるコイルであって、コイル導体とコイル導体を被覆するコイル絶縁被膜とを有するコイルと、
を備え、
コイル絶縁被膜は、スロット絶縁体の誘電率と異なる誘電率、及びスロット絶縁体の厚さと異なる厚さを有することを特徴とする回転電機の固定子。 A plurality of slots arranged along the circumferential direction of the stator core;
A slot insulator disposed along the slot inner wall;
A coil inserted into a slot and wound, the coil having a coil conductor and a coil insulation coating covering the coil conductor;
With
The coil insulating film has a dielectric constant different from that of the slot insulator and a thickness different from the thickness of the slot insulator. 請求項1に記載の回転電機の固定子において、
コイル絶縁被膜は、
誘電率がスロット絶縁体の誘電率よりも大きく、厚さがスロット絶縁体よりも薄いことを特徴とする回転電機の固定子。 In the stator of the rotating electrical machine according to claim 1,
Coil insulation coating
A stator for a rotating electrical machine, wherein a dielectric constant is larger than a dielectric constant of a slot insulator and a thickness thereof is thinner than that of a slot insulator. 請求項1に記載の回転電機の固定子において、
コイル絶縁被膜は、
誘電率がスロット絶縁体の誘電率よりも小さく、厚さがスロット絶縁体よりも厚いことを特徴とする回転電機の固定子。 In the stator of the rotating electrical machine according to claim 1,
Coil insulation coating
A stator for a rotating electrical machine, wherein a dielectric constant is smaller than a dielectric constant of a slot insulator and a thickness thereof is larger than that of the slot insulator. 請求項２に記載の回転電機の固定子において、
コイルエンドのコイル絶縁被膜よりもスロット内のコイル絶縁被膜が薄いことを特徴とする回転電機の固定子。 The stator of the rotating electrical machine according to claim 2,
A stator for a rotating electric machine, wherein a coil insulating film in a slot is thinner than a coil insulating film at a coil end.
JP2012232070A 2012-10-19 2012-10-19 Stator of dynamo-electric machine Pending JP2014087101A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2012232070A JP2014087101A (en) 2012-10-19 2012-10-19 Stator of dynamo-electric machine
PCT/IB2013/002204 WO2014060808A2 (en) 2012-10-19 2013-10-07 Stator of rotary electric machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012232070A JP2014087101A (en) 2012-10-19 2012-10-19 Stator of dynamo-electric machine

Publications (1)

Publication Number Publication Date
JP2014087101A true JP2014087101A (en) 2014-05-12

Family

ID=50001012

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012232070A Pending JP2014087101A (en) 2012-10-19 2012-10-19 Stator of dynamo-electric machine

Country Status (2)

Country Link
JP (1) JP2014087101A (en)
WO (1) WO2014060808A2 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62193103A (en) * 1986-02-19 1987-08-25 Fuji Electric Co Ltd Insulated coil
JPH01116547U (en) * 1988-01-28 1989-08-07
JPH03113947U (en) * 1990-03-07 1991-11-21
JP2004508800A (en) * 2000-09-14 2004-03-18 ゼネラル　エレクトリック　カナダ　インコーポレーテッド Stepped electric field insulation system for dynamoelectric machine
JP2005341706A (en) * 2004-05-27 2005-12-08 Hitachi Ltd Rotating electric machine
WO2007139490A1 (en) * 2006-05-29 2007-12-06 Abb Technology Ltd. Stator winding insulation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH632608A5 (en) * 1976-09-17 1982-10-15 Asea Ab An electrical conductor which is provided with insulation which contains layers of mica between which layers consisting of a resin material are arranged
EP0440865A1 (en) * 1990-02-09 1991-08-14 Asea Brown Boveri Ab Electrical insulation
JP2008236924A (en) 2007-03-22 2008-10-02 Hitachi Ltd Rotary electrical machine and electric vehicle
JP5227104B2 (en) * 2008-07-25 2013-07-03 トヨタ自動車株式会社 Interphase insulating material
JP2012113836A (en) 2010-11-19 2012-06-14 Toyota Motor Corp Insulation coating conductor wire and rotary electric machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62193103A (en) * 1986-02-19 1987-08-25 Fuji Electric Co Ltd Insulated coil
JPH01116547U (en) * 1988-01-28 1989-08-07
JPH03113947U (en) * 1990-03-07 1991-11-21
JP2004508800A (en) * 2000-09-14 2004-03-18 ゼネラル　エレクトリック　カナダ　インコーポレーテッド Stepped electric field insulation system for dynamoelectric machine
JP2005341706A (en) * 2004-05-27 2005-12-08 Hitachi Ltd Rotating electric machine
WO2007139490A1 (en) * 2006-05-29 2007-12-06 Abb Technology Ltd. Stator winding insulation

Also Published As

Publication number Publication date
WO2014060808A3 (en) 2015-07-16
WO2014060808A2 (en) 2014-04-24

Similar Documents

Publication Publication Date Title
CN108028556B (en) Rotating electrical machine
JP5314908B2 (en) Rotating electric machine stator and rotating electric machine
TWI524633B (en) Rotating electric machine and manufacturing method of rotating electric machine
JP5790603B2 (en) Power collection and distribution ring and electric motor
KR101247085B1 (en) Two conductor winding for an induction motor circuit
TW201521330A (en) Concentrated type motor
JP2008237015A (en) Armature lamination
US20120086288A1 (en) Electric rotating machine
JP2014087100A (en) Stator for rotary electric machine
JP5935716B2 (en) Rotating electric machine stator
JP2016135060A (en) Rotary electric machine stator
JP6598736B2 (en) Rotating electric machine stator
JP2011072071A (en) Stator of dynamo-electric machine
JP2012095488A (en) Rotor for rotary electric machine and rotary electric machine using the same
JP2012124984A (en) Rotary electric machine
JP2014207785A (en) Motor
JP5995883B2 (en) Rotating electric machine stator
JP6210705B2 (en) Rotating electric machine and stator used therefor
JP2007336725A (en) Stator of rotating electric machine
US20150372575A1 (en) High speed induction machine with fractional-slot tooth-coil winding
JP6093684B2 (en) Rotating electric machine stator and rotating electric machine equipped with the same
JP2013085476A (en) Stator for rotary electric machine
JP2014087101A (en) Stator of dynamo-electric machine
CN110741537B (en) Rotating electrical machine
JP5172439B2 (en) Rotating electric machine stator and rotating electric machine

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20140815

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20140902

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20150113