WO2014068695A1 - Coil for rotary electric machine and rotary electric machine - Google Patents
Coil for rotary electric machine and rotary electric machine Download PDFInfo
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- WO2014068695A1 WO2014068695A1 PCT/JP2012/078141 JP2012078141W WO2014068695A1 WO 2014068695 A1 WO2014068695 A1 WO 2014068695A1 JP 2012078141 W JP2012078141 W JP 2012078141W WO 2014068695 A1 WO2014068695 A1 WO 2014068695A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/18—Windings for salient poles
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- the present invention relates to a rotating electric machine, and more particularly to an improvement of an edgewise coil that constitutes a stator thereof.
- the present invention has been made to solve such a problem, and is formed inside the coil bending portion by shifting the coil bending position not only on the coil end side of the edgewise coil but also on the non-coil end side.
- the purpose of this is to eliminate the overlapping of the bulging portions, and as a result, to reduce the size of the edgewise coil and improve the heat dissipation of the coil.
- the bending position of the edgewise coil is different between the odd-numbered conductor and the even-numbered conductor on the coil end side, and also on the non-coil end side, The bending position of adjacent coils is changed in the coil stacking direction.
- the present invention it is possible to more reliably avoid the overlapping of the bulging portions of the inner circumference of the conductor due to edgewise bending by changing the bending position of the edgewise coil not only on the coil end side but also on the non-coil end side. Therefore, it is possible to reduce the size of the winding and improve the heat dissipation.
- FIG. 3 is a schematic diagram showing a cross section taken along line XX and line YY in FIG. 2. It is the schematic which shows the rotary electric machine to which the coil which concerns on Embodiment 1 of this invention is applied.
- FIG. 1 is a sectional view schematically showing a rotating electrical machine to which the present invention is applied.
- the rotating electrical machine has a cylindrical center frame 1 and a front frame 2 and a rear frame 3 attached to both side surfaces of the center frame 1 on the load side and the anti-load side.
- a stator 4 formed in an annular shape is fitted to the peripheral surface.
- a bus bar 5 that supplies power to each phase of the UVW is attached to the end face on the opposite side of the stator 4 via a bus bar holder.
- front frame 2 and the rear frame 3 are provided with a load-side bearing 6 and an anti-load-side bearing 7, and the rotation shaft 8 is supported by these bearings 6, 7 and is fixed to the rotation shaft 8.
- a rotor 9 is arranged to face the stator 4 and is rotatably supported.
- FIG. 2 is a schematic diagram showing a partial configuration of the stator 4 according to the first embodiment of the present invention applied to such a rotating electric machine.
- an iron core 10 of a stator 4 is formed by laminating thin steel plates having magnetism such as electromagnetic steel plates, and a stator coil 13 is wound around the iron core 10 via a coil bobbin 11 and insulating paper 12.
- the strand of the stator coil 13 is a strip-shaped copper wire having a large width ratio with respect to the thickness, and the surface thereof is covered with an insulator.
- a so-called edgewise type coil is formed by bending the wire.
- the coil 13 has bent portions at four corners and is wound in a substantially quadrangular shape, and includes a coil end portion 13A perpendicular to the rotating shaft 8 of the rotating electrical machine and a non-coil end portion 13B parallel to the rotating shaft. have.
- the stator 4 is formed by fitting a plurality of coils 13 wound in such an edgewise manner into the iron core 10 in an annular shape.
- the edgewise type coil is generally processed by the following process. That is, as shown in FIG. 3 (a), the strip-like strand 20 is brought into contact with and moved between the fixed support member 21 and the movable member 22, and as shown in FIG. 3 (b). In addition, by moving the movable member 22 along the trajectory A in a state where one is fixedly held by the fixing member 23, a bent portion is formed so as to be wound around the support member 21. Next, as shown in FIG. 3 (c), the movable member 22 is returned to the original position, the fixing member 23 is released and the wire 20 is sent out in the direction of the arrow in the figure, and then the next bending point. When reaching the support member 21, the feeding is stopped and the above-described bending process is performed, and the edgewise coil 13 having a predetermined number of turns is formed by repeating such a process.
- the coil bend portion 13A side of the edgewise coil 13 is arranged on the first bend portion and the second bend portion laminated adjacent to the first bend portion.
- the bending position of the conductor is changed so that the height of the winding is staggered for each turn, and the non-coil end portion 13B side of the winding is bent from the center of the rotor 9 toward the radially outer side. Is changed so as to spread in a tapered shape. That is, the shape at the end of winding on the coil end portion 13A side (XX cross section in FIG. 2) is almost the same height between the odd-numbered turns as shown in FIG. 4 (a).
- the even-numbered turns are wound at substantially the same height different from the odd-numbered heights, while the shape on the non-coil end portion 13B side (YY cross section in FIG. 2) is shown in FIG. As shown to b), it is comprised so that it may spread sequentially.
- the coil bending position on the non-coil end portion 13B side is shifted in a taper shape extending radially outward from the center of the rotary shaft 8, and the iron core 10 is similarly formed in a taper shape.
- the inner peripheral surface of the winding can be brought into contact with the iron core 10 via the insulating paper 12, and the thickness of the coil 13 can be effectively reduced without impairing the heat dissipation of the coil 13.
- a passage 1A for circulating cooling water is provided in the center frame 1 as shown in FIG. 5, and the heat generated in the coil 13 is generated by the coil 13, the stator core 10, the frame 1, It is suitable for a rotating electrical machine having a water cooling structure that discharges to the outside through a heat transfer path of cooling water. That is, by forming the non-coil end portion 13B in a tapered shape, the inner circumference of the tapered coil is fitted into the tapered stator core 10, so that the coil 13 and the stator core 10 can be reliably brought into contact with each other. Furthermore, the coil cooling performance can be further improved by avoiding the overlapping of the bent bulge portions and improving the adhesion between the coils.
- the coil is wound in advance with the non-coil end side aligned, and is fitted into the stator core. Therefore, it is necessary to set a gap between the coil inner diameter and the stator core. The heat transfer to the core will be reduced.
- FIG. FIG. 6 shows a coil of a rotating electrical machine according to Embodiment 2 of the present invention.
- the non-coil end portion 13B in addition to the coil end portion 13A, also has the odd-numbered turns set to substantially the same height, and the even-numbered turns set to the odd-numbered height. It is configured as different and almost the same height. Even with this configuration, it is possible to avoid the overlapping of the bent bulges, and the same effect as in the first embodiment can be obtained.
- the second embodiment is suitable for an oil cooling structure used in an electric vehicle or a hybrid electric vehicle.
- FIG. 7 shows a schematic structure of such a rotating electrical machine.
- an oil pipe 14 is provided on the front frame 2 to eject oil as a refrigerant from the coil end portion 13A side in the axial direction of the rotating electrical machine. It is comprised as follows. With this configuration, the oil flows along the gap between the coil end portions 13B formed in the axial direction of the rotating electrical machine as indicated by the arrows in FIG. It can be taken in between the plurality of coils 13.
- the stator 4 that is long in the rotating shaft direction of the rotating electrical machine, a large contact area with the oil can be taken, and the stator 13 penetrates in the rotating shaft direction of the rotating electrical machine between adjacent stator coils 13.
- a gap can be provided, and a high space factor and high heat dissipation can be achieved at the same time, in addition to avoiding overlapping of the bent bulge portions of the windings.
- the oil pipe 14 may be provided on the rear frame 3 side or on both sides of the front frame 2 and the rear frame 3. Further, instead of the oil pipe 14, oil may be stored inside the rotating electrical machine, and the oil may be scraped up by the rotor and supplied to the coil end portion. Oil can be supplied to the inside of the coil through the gap between them, and high heat dissipation can be ensured.
- FIG. 8 is a schematic configuration diagram showing a coil of the rotating electrical machine according to the third embodiment of the present invention.
- the coil height of the non-coil end portion 13 ⁇ / b> B is configured to have a different taper shape that extends radially outward from the center of the rotation axis in both odd and even numbers.
- the clearance gap penetrated in the rotating shaft direction of the rotary electric machine can be provided between the coils of the adjacent stator, which is suitable for the rotary electric machine having an oil cooling structure. That is, by making the outer shape of the winding on the non-coil end 13B side tapered, a winding with a higher space factor than that of the second embodiment can be achieved.
- Embodiment 4 Using the edgewise type coil 13 described in the first to third embodiments as described above, this coil portion is molded and fixed with a resin having excellent thermal conductivity, and is further fitted into the stator core 10. Even when it is molded, the same effect can be obtained in miniaturization in the coil stacking direction and increase in the heat radiation area.
- each embodiment can be appropriately modified or omitted within the scope of the invention.
- the present invention can improve the size and heat dissipation of the edgewise coil, and is suitable as a rotating electric machine used in automobiles and the like.
Abstract
The present invention eliminates overlap caused by bulging of an inner periphery due to bending of a coil end side and a non-coil end side of an edge-wise coil used in a rotary electric machine. An edge-wise coil bending position differs on a coil end side between an odd-numbered wound conductor and an even-numbered wound conductor. The bending positions of coils adjacent to each other in the coil stacking direction are shifted on the non-coil end side as well, and overlap caused by bulging of a coil inner periphery section when bending is performed is prevented.
Description
この発明は、回転電機に関し、特に、その固定子を構成するエッジワイズ型コイルの改良に関するものである。
The present invention relates to a rotating electric machine, and more particularly to an improvement of an edgewise coil that constitutes a stator thereof.
従来のエッジワイズ型コイルにおいては、巻回されたエッジワイズ型コイルのコイルエンド側のみの高さを変えることにより、曲げによる内周側の膨らみがコイル同士で重ならないように配置するものが知られている。（例えば、特許文献1参照）
In the conventional edgewise type coil, by changing the height of only the coil end side of the wound edgewise type coil, the bulge on the inner peripheral side due to bending is arranged so that the coils do not overlap each other. It has been. (For example, see Patent Document 1)
しかしながら、特許文献１に示される従来のエッジワイズ型コイルの配置では、エッジワイズ型コイルの非コイルエンド側に形成された曲げによる内周の膨らみの重なりを回避することができず、コイルの積層方向の厚みが増大することになっていた。
However, in the arrangement of the conventional edgewise type coil shown in Patent Document 1, it is not possible to avoid the overlapping of the bulges on the inner circumference due to the bending formed on the non-coil end side of the edgewise type coil. The thickness in the direction was to increase.
この発明は、かかる課題を解決するためになされたもので、エッジワイズ型コイルのコイルエンド側だけでなく、非コイルエンド側においてもコイル曲げ位置をずらすことによって、コイル曲げ部の内側に形成される膨らみ部の重なりを解消し、結果としてエッジワイズ型コイルの小型化とコイルの放熱性の向上を目的とするものである。
The present invention has been made to solve such a problem, and is formed inside the coil bending portion by shifting the coil bending position not only on the coil end side of the edgewise coil but also on the non-coil end side. The purpose of this is to eliminate the overlapping of the bulging portions, and as a result, to reduce the size of the edgewise coil and improve the heat dissipation of the coil.
この発明に係る回転電機においては、エッジワイズ型コイルの曲げ位置がコイルエンド側において、奇数番目に巻かれた導体と偶数番目に巻かれた導体とで異なり、さらに、非コイルエンド側においても、コイルの積層方向で隣合うコイル同士の曲げ位置を変化させるように構成したものである。
In the rotating electrical machine according to the present invention, the bending position of the edgewise coil is different between the odd-numbered conductor and the even-numbered conductor on the coil end side, and also on the non-coil end side, The bending position of adjacent coils is changed in the coil stacking direction.
この発明によれば、エッジワイズ型コイルの曲げ位置をコイルエンド側だけでなく、非コイルエンド側も変化させることによって、エッジワイズ曲げによる導体内周の膨らみ部の重なりをより確実に回避することができ、巻線の小型化と放熱性を向上させることができる。
According to the present invention, it is possible to more reliably avoid the overlapping of the bulging portions of the inner circumference of the conductor due to edgewise bending by changing the bending position of the edgewise coil not only on the coil end side but also on the non-coil end side. Therefore, it is possible to reduce the size of the winding and improve the heat dissipation.
実施の形態１．
以下、本発明を実施の形態１である図面を参照して説明する。
図１は、この発明を適用した回転電機の概略を示す断面図である。
図において、回転電機は、筒状のセンターフレーム１と、このセンターフレーム１の負荷側および反負荷側の両側面に取り付けられたフロントフレーム２およびリアフレーム３とを有し、センターフレーム１の内周面には円環状に形成された固定子４が嵌合されている。また、固定子４の反負荷側の端面にＵＶＷ各相に給電するバスバー５がバスバーホルダを介して取り付けられている。さらに、フロントフレーム２およびリアフレーム３には、負荷側軸受け６および反負荷側軸受け７が設けられ、これらの軸受け６、７によって回転軸８を支持し、かつ、この回転軸８に固定された回転子９を固定子４に対向配置して回転可能に支持している。Embodiment 1 FIG.
Hereinafter, the present invention will be described with reference to the drawings which are the first embodiment.
FIG. 1 is a sectional view schematically showing a rotating electrical machine to which the present invention is applied.
In the figure, the rotating electrical machine has acylindrical center frame 1 and a front frame 2 and a rear frame 3 attached to both side surfaces of the center frame 1 on the load side and the anti-load side. A stator 4 formed in an annular shape is fitted to the peripheral surface. Further, a bus bar 5 that supplies power to each phase of the UVW is attached to the end face on the opposite side of the stator 4 via a bus bar holder. Further, the front frame 2 and the rear frame 3 are provided with a load-side bearing 6 and an anti-load-side bearing 7, and the rotation shaft 8 is supported by these bearings 6, 7 and is fixed to the rotation shaft 8. A rotor 9 is arranged to face the stator 4 and is rotatably supported.
以下、本発明を実施の形態１である図面を参照して説明する。
図１は、この発明を適用した回転電機の概略を示す断面図である。
図において、回転電機は、筒状のセンターフレーム１と、このセンターフレーム１の負荷側および反負荷側の両側面に取り付けられたフロントフレーム２およびリアフレーム３とを有し、センターフレーム１の内周面には円環状に形成された固定子４が嵌合されている。また、固定子４の反負荷側の端面にＵＶＷ各相に給電するバスバー５がバスバーホルダを介して取り付けられている。さらに、フロントフレーム２およびリアフレーム３には、負荷側軸受け６および反負荷側軸受け７が設けられ、これらの軸受け６、７によって回転軸８を支持し、かつ、この回転軸８に固定された回転子９を固定子４に対向配置して回転可能に支持している。
Hereinafter, the present invention will be described with reference to the drawings which are the first embodiment.
FIG. 1 is a sectional view schematically showing a rotating electrical machine to which the present invention is applied.
In the figure, the rotating electrical machine has a
図２は、このような回転電機に適用するこの発明の実施の形態１である固定子４の一部構成を示す概略図である。
図において、固定子４の鉄心１０は、電磁鋼鈑などの磁性を有する薄い鋼板を積層して形成され、この鉄心１０には、コイルボビン１１および絶縁紙１２を介して固定子コイル１３が巻装されている。この固定子コイル１３の素線は、厚さに対して幅の割合が大きい帯状の銅線が用いられ、かつ、その表面には絶縁体が被覆されており、この帯状の素線を幅方向に曲げて、いわゆるエッジワイズ型のコイルが形成されている。このコイル１３は、四隅に曲げ部を有し、概ね四角形状に巻回されており、回転電機の回転軸８に垂直に交差するコイルエンド部１３Ａと回転軸に平行な非コイルエンド部１３Ｂとを有している。
このようなエッジワイズ型に巻回された複数のコイル１３を鉄心１０に円環状に嵌め込むことにより固定子４が形成される。 FIG. 2 is a schematic diagram showing a partial configuration of thestator 4 according to the first embodiment of the present invention applied to such a rotating electric machine.
In the figure, aniron core 10 of a stator 4 is formed by laminating thin steel plates having magnetism such as electromagnetic steel plates, and a stator coil 13 is wound around the iron core 10 via a coil bobbin 11 and insulating paper 12. Has been. The strand of the stator coil 13 is a strip-shaped copper wire having a large width ratio with respect to the thickness, and the surface thereof is covered with an insulator. A so-called edgewise type coil is formed by bending the wire. The coil 13 has bent portions at four corners and is wound in a substantially quadrangular shape, and includes a coil end portion 13A perpendicular to the rotating shaft 8 of the rotating electrical machine and a non-coil end portion 13B parallel to the rotating shaft. have.
Thestator 4 is formed by fitting a plurality of coils 13 wound in such an edgewise manner into the iron core 10 in an annular shape.
図において、固定子４の鉄心１０は、電磁鋼鈑などの磁性を有する薄い鋼板を積層して形成され、この鉄心１０には、コイルボビン１１および絶縁紙１２を介して固定子コイル１３が巻装されている。この固定子コイル１３の素線は、厚さに対して幅の割合が大きい帯状の銅線が用いられ、かつ、その表面には絶縁体が被覆されており、この帯状の素線を幅方向に曲げて、いわゆるエッジワイズ型のコイルが形成されている。このコイル１３は、四隅に曲げ部を有し、概ね四角形状に巻回されており、回転電機の回転軸８に垂直に交差するコイルエンド部１３Ａと回転軸に平行な非コイルエンド部１３Ｂとを有している。
このようなエッジワイズ型に巻回された複数のコイル１３を鉄心１０に円環状に嵌め込むことにより固定子４が形成される。 FIG. 2 is a schematic diagram showing a partial configuration of the
In the figure, an
The
ところで、エッジワイズ型のコイルは、一般的に次のような工程によって加工されている。
すなわち、図３（a）に示すように、固定された支持部材２１と可動部材２２間に帯状の素線２０を当接させて移動させ、所定の位置において、図３（ｂ）に示すように、一方を固定部材２３によって固定保持した状態で可動部材２２を軌跡Ａに沿って移動させることにより、支持部材２１に巻きつけるようにして曲げ部が形成される。次に、図３（ｃ）に示すように、可動部材２２を元の位置に戻すとともに、固定部材２３の固定を解放して素線２０を図中矢印方向に送り出し、その後、次の曲げ点が支持部材２１に到達すると、送りを停止して上述の曲げ加工を行ない、このような工程を繰り返して所定の巻数のエッジワイズ型コイル１３が形成されることになる。 By the way, the edgewise type coil is generally processed by the following process.
That is, as shown in FIG. 3 (a), the strip-like strand 20 is brought into contact with and moved between the fixed support member 21 and the movable member 22, and as shown in FIG. 3 (b). In addition, by moving the movable member 22 along the trajectory A in a state where one is fixedly held by the fixing member 23, a bent portion is formed so as to be wound around the support member 21. Next, as shown in FIG. 3 (c), the movable member 22 is returned to the original position, the fixing member 23 is released and the wire 20 is sent out in the direction of the arrow in the figure, and then the next bending point. When reaching the support member 21, the feeding is stopped and the above-described bending process is performed, and the edgewise coil 13 having a predetermined number of turns is formed by repeating such a process.
すなわち、図３（a）に示すように、固定された支持部材２１と可動部材２２間に帯状の素線２０を当接させて移動させ、所定の位置において、図３（ｂ）に示すように、一方を固定部材２３によって固定保持した状態で可動部材２２を軌跡Ａに沿って移動させることにより、支持部材２１に巻きつけるようにして曲げ部が形成される。次に、図３（ｃ）に示すように、可動部材２２を元の位置に戻すとともに、固定部材２３の固定を解放して素線２０を図中矢印方向に送り出し、その後、次の曲げ点が支持部材２１に到達すると、送りを停止して上述の曲げ加工を行ない、このような工程を繰り返して所定の巻数のエッジワイズ型コイル１３が形成されることになる。 By the way, the edgewise type coil is generally processed by the following process.
That is, as shown in FIG. 3 (a), the strip-
このようなエッジワイズ型コイル１３においては、一般に帯状の素線２０を片側を固定して曲げるため、部材に偏りが生じることになり、この偏りは、図３（ｃ）に、２０Ａで示すように、曲げ始め時に対して曲げ終わり時における膨らみの方が大きくなることが知られている。
In such an edgewise coil 13, since the strip-shaped strand 20 is generally bent with one side fixed, the member is biased. This bias is shown by 20 A in FIG. 3 (c). In addition, it is known that the bulge at the end of bending is larger than that at the start of bending.
したがって、本発明の実施の形態１においては、エッジワイズ型のコイル１３のコイルエンド部１３Ａ側を、第１の曲げ部とこの第１の曲げ部に隣接して積層される第２の曲げ部とをターン毎に巻線の高さが互い違いになるように導体の曲げ位置を変化させ、かつ、巻線の非コイルエンド部１３Ｂ側を、回転子９中心から径方向外側へ行くに従って曲げ位置がテーパー状に広がるように変化させている。
すなわち、コイルエンド部１３Ａ側の巻線終了時の形状（図２のＸ－Ｘ断面）は、図４（ａ）に示すように奇数番目に巻かれたターン同士はほぼ同じ高さとなり、同様に偶数番目に巻かれたターン同士は、奇数番目の高さと異なるほぼ同じ高さに巻回され、一方、非コイルエンド部１３Ｂ側の形状（図２のＹ－Ｙ断面）は、図４（ｂ）に示すように順次広がるように構成されている。 Therefore, in the first embodiment of the present invention, the coil bend portion 13A side of theedgewise coil 13 is arranged on the first bend portion and the second bend portion laminated adjacent to the first bend portion. The bending position of the conductor is changed so that the height of the winding is staggered for each turn, and the non-coil end portion 13B side of the winding is bent from the center of the rotor 9 toward the radially outer side. Is changed so as to spread in a tapered shape.
That is, the shape at the end of winding on the coil end portion 13A side (XX cross section in FIG. 2) is almost the same height between the odd-numbered turns as shown in FIG. 4 (a). The even-numbered turns are wound at substantially the same height different from the odd-numbered heights, while the shape on the non-coil end portion 13B side (YY cross section in FIG. 2) is shown in FIG. As shown to b), it is comprised so that it may spread sequentially.
すなわち、コイルエンド部１３Ａ側の巻線終了時の形状（図２のＸ－Ｘ断面）は、図４（ａ）に示すように奇数番目に巻かれたターン同士はほぼ同じ高さとなり、同様に偶数番目に巻かれたターン同士は、奇数番目の高さと異なるほぼ同じ高さに巻回され、一方、非コイルエンド部１３Ｂ側の形状（図２のＹ－Ｙ断面）は、図４（ｂ）に示すように順次広がるように構成されている。 Therefore, in the first embodiment of the present invention, the coil bend portion 13A side of the
That is, the shape at the end of winding on the coil end portion 13A side (XX cross section in FIG. 2) is almost the same height between the odd-numbered turns as shown in FIG. 4 (a). The even-numbered turns are wound at substantially the same height different from the odd-numbered heights, while the shape on the non-coil end portion 13B side (YY cross section in FIG. 2) is shown in FIG. As shown to b), it is comprised so that it may spread sequentially.
このように構成することによって、コイルエンド部１３Ａ側に現れる曲げ膨らみ部の重なりと、非コイルエンド部１３Ｂ側に現れる曲げ膨らみ部の重なりとを回避することができ、巻線の厚みの減少に対して十分な効果を得ることが可能となる。
また、非コイルエンド部１３Ｂ側のコイル曲げ位置を、回転軸８の中心から半径方向外側へ拡がるテーパー状にずらすとともに、鉄心１０を同様にテーパー状に形成することによって、図４（ｂ）から明らかなように巻線の内周面を鉄心１０に絶縁紙１２を介して当接させることができ、コイル１３の放熱性を損なわずにコイル１３の厚みを効果的に減少させることができる。 By configuring in this way, it is possible to avoid the overlapping of the bending bulge portion appearing on the coil end portion 13A side and the overlapping of the bending bulging portion appearing on the non-coil end portion 13B side, thereby reducing the thickness of the winding. A sufficient effect can be obtained.
4B, the coil bending position on the non-coil end portion 13B side is shifted in a taper shape extending radially outward from the center of therotary shaft 8, and the iron core 10 is similarly formed in a taper shape. As can be seen, the inner peripheral surface of the winding can be brought into contact with the iron core 10 via the insulating paper 12, and the thickness of the coil 13 can be effectively reduced without impairing the heat dissipation of the coil 13.
また、非コイルエンド部１３Ｂ側のコイル曲げ位置を、回転軸８の中心から半径方向外側へ拡がるテーパー状にずらすとともに、鉄心１０を同様にテーパー状に形成することによって、図４（ｂ）から明らかなように巻線の内周面を鉄心１０に絶縁紙１２を介して当接させることができ、コイル１３の放熱性を損なわずにコイル１３の厚みを効果的に減少させることができる。 By configuring in this way, it is possible to avoid the overlapping of the bending bulge portion appearing on the coil end portion 13A side and the overlapping of the bending bulging portion appearing on the non-coil end portion 13B side, thereby reducing the thickness of the winding. A sufficient effect can be obtained.
4B, the coil bending position on the non-coil end portion 13B side is shifted in a taper shape extending radially outward from the center of the
また、上述のようなエッジワイズ型コイル１３においては、図５に示すようにセンターフレーム１に冷却水を循環させる通路１Ａを設け、コイル１３の発熱をコイル１３、固定子鉄心１０、フレーム１、冷却水の伝熱経路で外部へ放出する水冷構造の回転電機に好適である。
すなわち、非コイルエンド部１３Ｂをテーパー状に形成することによって、テーパー状のコイル内周がテーパー状の固定子鉄心１０に嵌り込むため、コイル１３と固定子鉄心１０を確実に当接させることができ、さらに、曲げ膨らみ部の重なりを回避してコイル同士の密着性を高めることによって、更なるコイル冷却性の向上が可能となる。 Further, in theedgewise coil 13 as described above, a passage 1A for circulating cooling water is provided in the center frame 1 as shown in FIG. 5, and the heat generated in the coil 13 is generated by the coil 13, the stator core 10, the frame 1, It is suitable for a rotating electrical machine having a water cooling structure that discharges to the outside through a heat transfer path of cooling water.
That is, by forming the non-coil end portion 13B in a tapered shape, the inner circumference of the tapered coil is fitted into thetapered stator core 10, so that the coil 13 and the stator core 10 can be reliably brought into contact with each other. Furthermore, the coil cooling performance can be further improved by avoiding the overlapping of the bent bulge portions and improving the adhesion between the coils.
すなわち、非コイルエンド部１３Ｂをテーパー状に形成することによって、テーパー状のコイル内周がテーパー状の固定子鉄心１０に嵌り込むため、コイル１３と固定子鉄心１０を確実に当接させることができ、さらに、曲げ膨らみ部の重なりを回避してコイル同士の密着性を高めることによって、更なるコイル冷却性の向上が可能となる。 Further, in the
That is, by forming the non-coil end portion 13B in a tapered shape, the inner circumference of the tapered coil is fitted into the
なお、従来のエッジワイズ型コイルでは、非コイルエンド側が整列した状態でコイルを予め巻回し、固定子鉄心に嵌め込むため、コイル内径と固定子鉄心の間に隙間を設定する必要があり、固定子鉄心への伝熱性が低下することになる。
In addition, in the conventional edgewise type coil, the coil is wound in advance with the non-coil end side aligned, and is fitted into the stator core. Therefore, it is necessary to set a gap between the coil inner diameter and the stator core. The heat transfer to the core will be reduced.
実施の形態２．
図６は、この発明の実施の形態２である回転電機のコイルを示している。
この実施の形態２においては、コイルエンド部１３Ａに加えて非コイルエンド部１３Ｂも、奇数番目に巻かれたターン同士をほぼ同じ高さとし、偶数番目に巻かれたターン同士も奇数番目の高さと異なるほぼ同じ高さとして構成したものである。
このように構成することによっても、曲げ膨らみ部の重なりを回避することができ、実施の形態１と同様の効果を得ることができる。Embodiment 2. FIG.
FIG. 6 shows a coil of a rotating electrical machine according toEmbodiment 2 of the present invention.
In the second embodiment, in addition to the coil end portion 13A, the non-coil end portion 13B also has the odd-numbered turns set to substantially the same height, and the even-numbered turns set to the odd-numbered height. It is configured as different and almost the same height.
Even with this configuration, it is possible to avoid the overlapping of the bent bulges, and the same effect as in the first embodiment can be obtained.
図６は、この発明の実施の形態２である回転電機のコイルを示している。
この実施の形態２においては、コイルエンド部１３Ａに加えて非コイルエンド部１３Ｂも、奇数番目に巻かれたターン同士をほぼ同じ高さとし、偶数番目に巻かれたターン同士も奇数番目の高さと異なるほぼ同じ高さとして構成したものである。
このように構成することによっても、曲げ膨らみ部の重なりを回避することができ、実施の形態１と同様の効果を得ることができる。
FIG. 6 shows a coil of a rotating electrical machine according to
In the second embodiment, in addition to the coil end portion 13A, the non-coil end portion 13B also has the odd-numbered turns set to substantially the same height, and the even-numbered turns set to the odd-numbered height. It is configured as different and almost the same height.
Even with this configuration, it is possible to avoid the overlapping of the bent bulges, and the same effect as in the first embodiment can be obtained.
また、実施の形態２においては、電気自動車やハイブリッド式電気自動車で用いられる油冷構造において好適である。
図７はこのような回転電機の概略構造を示すもので、図において、フロントフレーム２にオイル配管１４を設け、コイルエンド部１３Ａ側から回転電機の軸方向に向けて冷媒となるオイルを噴出させるように構成したものである。このように構成することによって、図６（Ｃ）の矢印で示すように回転電機の軸方向に形成されたコイルエンド部１３Ｂの隙間に沿ってオイルが流れることになり、より積極的にオイルを複数のコイル１３の間に取り込むことができる。特に、回転電機の回転軸方向に長い固定子４においては、オイルとの接触面積を大きく取ることができ、かつ、隣り合う固定子のコイル１３との間に回転電機の回転軸方向に貫通した隙間を設けることができ、巻線の曲げ膨らみ部の重なりを回避した点と併せ、高い占積率と高い放熱性を両立させることができる。
なお、オイル配管１４は、リアフレーム３側あるいはフロントフレーム２およびリアフレーム３の両側に設けてもよい。
さらに、オイル配管１４に代えて、回転電機の内部にオイルを溜めておき、このオイルを回転子によって掻き揚げてコイルエンド部に供給するように構成してもよく、この場合においても同様にコイル間の隙間を伝ってコイルの奥まで給油させることができ、高い放熱性を確保することができる。 The second embodiment is suitable for an oil cooling structure used in an electric vehicle or a hybrid electric vehicle.
FIG. 7 shows a schematic structure of such a rotating electrical machine. In the figure, anoil pipe 14 is provided on the front frame 2 to eject oil as a refrigerant from the coil end portion 13A side in the axial direction of the rotating electrical machine. It is comprised as follows. With this configuration, the oil flows along the gap between the coil end portions 13B formed in the axial direction of the rotating electrical machine as indicated by the arrows in FIG. It can be taken in between the plurality of coils 13. In particular, in the stator 4 that is long in the rotating shaft direction of the rotating electrical machine, a large contact area with the oil can be taken, and the stator 13 penetrates in the rotating shaft direction of the rotating electrical machine between adjacent stator coils 13. A gap can be provided, and a high space factor and high heat dissipation can be achieved at the same time, in addition to avoiding overlapping of the bent bulge portions of the windings.
Theoil pipe 14 may be provided on the rear frame 3 side or on both sides of the front frame 2 and the rear frame 3.
Further, instead of theoil pipe 14, oil may be stored inside the rotating electrical machine, and the oil may be scraped up by the rotor and supplied to the coil end portion. Oil can be supplied to the inside of the coil through the gap between them, and high heat dissipation can be ensured.
図７はこのような回転電機の概略構造を示すもので、図において、フロントフレーム２にオイル配管１４を設け、コイルエンド部１３Ａ側から回転電機の軸方向に向けて冷媒となるオイルを噴出させるように構成したものである。このように構成することによって、図６（Ｃ）の矢印で示すように回転電機の軸方向に形成されたコイルエンド部１３Ｂの隙間に沿ってオイルが流れることになり、より積極的にオイルを複数のコイル１３の間に取り込むことができる。特に、回転電機の回転軸方向に長い固定子４においては、オイルとの接触面積を大きく取ることができ、かつ、隣り合う固定子のコイル１３との間に回転電機の回転軸方向に貫通した隙間を設けることができ、巻線の曲げ膨らみ部の重なりを回避した点と併せ、高い占積率と高い放熱性を両立させることができる。
なお、オイル配管１４は、リアフレーム３側あるいはフロントフレーム２およびリアフレーム３の両側に設けてもよい。
さらに、オイル配管１４に代えて、回転電機の内部にオイルを溜めておき、このオイルを回転子によって掻き揚げてコイルエンド部に供給するように構成してもよく、この場合においても同様にコイル間の隙間を伝ってコイルの奥まで給油させることができ、高い放熱性を確保することができる。 The second embodiment is suitable for an oil cooling structure used in an electric vehicle or a hybrid electric vehicle.
FIG. 7 shows a schematic structure of such a rotating electrical machine. In the figure, an
The
Further, instead of the
実施の形態３
図８は、この発明の実施の形態３である回転電機のコイルを示す概略構成図である。
図８においては、非コイルエンド部１３Ｂのコイル高さを、奇数番目と偶数番目の両方それぞれにおいて回転軸中心から半径方向外側へ拡がるような異なるテーパー状に構成しており、このように構成することによっても、曲げ膨らみ部の重なりを回避することができ、実施の形態１、２と同様の効果を得ることができる。
なお、奇数番目と偶数番目の一方のみをテーパ状に形成しても同様な効果を得ることができる。Embodiment 3
FIG. 8 is a schematic configuration diagram showing a coil of the rotating electrical machine according to the third embodiment of the present invention.
In FIG. 8, the coil height of thenon-coil end portion 13 </ b> B is configured to have a different taper shape that extends radially outward from the center of the rotation axis in both odd and even numbers. By doing so, it is possible to avoid the overlapping of the bent bulges, and the same effects as in the first and second embodiments can be obtained.
The same effect can be obtained even if only one of the odd-numbered and even-numbered ones is formed in a tapered shape.
図８は、この発明の実施の形態３である回転電機のコイルを示す概略構成図である。
図８においては、非コイルエンド部１３Ｂのコイル高さを、奇数番目と偶数番目の両方それぞれにおいて回転軸中心から半径方向外側へ拡がるような異なるテーパー状に構成しており、このように構成することによっても、曲げ膨らみ部の重なりを回避することができ、実施の形態１、２と同様の効果を得ることができる。
なお、奇数番目と偶数番目の一方のみをテーパ状に形成しても同様な効果を得ることができる。
FIG. 8 is a schematic configuration diagram showing a coil of the rotating electrical machine according to the third embodiment of the present invention.
In FIG. 8, the coil height of the
The same effect can be obtained even if only one of the odd-numbered and even-numbered ones is formed in a tapered shape.
また、このような構成によれば、隣り合う固定子のコイルとの間に回転電機の回転軸方向に貫通した隙間を設けることができ、油冷構造を持つ回転電機に好適である。
すなわち、非コイルエンド１３Ｂ側の巻線の外形をテーパー状にすることによって、実施の形態２よりもさらに高い占積率の巻線が可能となる。 Moreover, according to such a structure, the clearance gap penetrated in the rotating shaft direction of the rotary electric machine can be provided between the coils of the adjacent stator, which is suitable for the rotary electric machine having an oil cooling structure.
That is, by making the outer shape of the winding on the non-coil end 13B side tapered, a winding with a higher space factor than that of the second embodiment can be achieved.
すなわち、非コイルエンド１３Ｂ側の巻線の外形をテーパー状にすることによって、実施の形態２よりもさらに高い占積率の巻線が可能となる。 Moreover, according to such a structure, the clearance gap penetrated in the rotating shaft direction of the rotary electric machine can be provided between the coils of the adjacent stator, which is suitable for the rotary electric machine having an oil cooling structure.
That is, by making the outer shape of the winding on the non-coil end 13B side tapered, a winding with a higher space factor than that of the second embodiment can be achieved.
実施の形態４
以上のような実施の形態１～３で説明したエッジワイズ型コイル１３を用い、このコイル部を熱伝導性に優れた樹脂でモールドして固定し、さらに、固定子鉄心１０と嵌り合う形状に成形された場合においても、コイルの積層方向の小型化、放熱面積の増加において同様の効果を得ることができる。Embodiment 4
Using theedgewise type coil 13 described in the first to third embodiments as described above, this coil portion is molded and fixed with a resin having excellent thermal conductivity, and is further fitted into the stator core 10. Even when it is molded, the same effect can be obtained in miniaturization in the coil stacking direction and increase in the heat radiation area.
以上のような実施の形態１～３で説明したエッジワイズ型コイル１３を用い、このコイル部を熱伝導性に優れた樹脂でモールドして固定し、さらに、固定子鉄心１０と嵌り合う形状に成形された場合においても、コイルの積層方向の小型化、放熱面積の増加において同様の効果を得ることができる。
Using the
なお、本発明は、その発明の範囲内において、各実施の形態を適宜、変形、省略することが可能である。
In the present invention, each embodiment can be appropriately modified or omitted within the scope of the invention.
この発明は、エッジワイズ型コイルの小型化と放熱性を向上させることができ、自動車などに用いられる回転電機として好適である。
The present invention can improve the size and heat dissipation of the edgewise coil, and is suitable as a rotating electric machine used in automobiles and the like.
１：センターフレーム ２：フロントフレーム ３：リアフレーム
４：固定子 ５：バスバー ６：負荷側軸受け
７：非負荷側軸受け ８：回転軸 ９：回転子
１０：鉄固定子心 １１：コイルボビン １２：絶縁紙
１３：コイル １３Ａ：コイルエンド部 １３Ｂ：非コイルエンド部
２０：素線 ２０Ａ：曲げ膨らみ部 ２１：支持部材
２２：可動部材 1: Center frame 2: Front frame 3: Rear frame 4: Stator 5: Bus bar 6: Load side bearing 7: Non-load side bearing 8: Rotating shaft 9: Rotor 10: Iron stator core 11: Coil bobbin 12: Insulation Paper 13: Coil 13A: Coil end portion 13B: Non-coil end portion 20: Wire 20A: Bending bulge portion 21: Support member 22: Movable member
４：固定子 ５：バスバー ６：負荷側軸受け
７：非負荷側軸受け ８：回転軸 ９：回転子
１０：鉄固定子心 １１：コイルボビン １２：絶縁紙
１３：コイル １３Ａ：コイルエンド部 １３Ｂ：非コイルエンド部
２０：素線 ２０Ａ：曲げ膨らみ部 ２１：支持部材
２２：可動部材 1: Center frame 2: Front frame 3: Rear frame 4: Stator 5: Bus bar 6: Load side bearing 7: Non-load side bearing 8: Rotating shaft 9: Rotor 10: Iron stator core 11: Coil bobbin 12: Insulation Paper 13: Coil 13A: Coil end portion 13B: Non-coil end portion 20: Wire 20A: Bending bulge portion 21: Support member 22: Movable member
Claims (9)
- 絶縁被覆された平板導体を幅方向に曲げて四角形状のエッジワイズ型コイルを構成する回転電機のコイルであって、
前記曲げによりコイルエンド部および非コイルエンド部を構成する第１の曲げ部と、
前記第１の曲げ部に隣接して積層され、コイルエンド部および非コイルエンド部を構成する第２の曲げ部とを有し、
前記第１の曲げ部と前記第２の曲げ部の内側部分の位置をコイルエンド部と非コイルエンド部について平板導体の平面方向に相互にずれるように配置し、前記各内側部分において生じる膨らみ部分が隣接する平板導体同士で対向しないようにしたことを特徴とする回転電機のコイル。 A coil of a rotating electrical machine that forms a rectangular edgewise coil by bending a flat conductor coated with insulation in the width direction,
A first bent portion constituting a coil end portion and a non-coil end portion by the bending;
A second bent portion that is laminated adjacent to the first bent portion and constitutes a coil end portion and a non-coil end portion;
The positions of the inner portions of the first bent portion and the second bent portion are arranged so that the coil end portion and the non-coil end portion are displaced from each other in the plane direction of the flat conductor, and the bulge portions generated in the inner portions Is a coil for a rotating electrical machine in which the adjacent flat conductors are not opposed to each other. - 前記第１の曲げ部および前記第２の曲げ部が順次に積層された複数の巻線部を含み、
前記非コイルエンド部において、前記巻線の曲げ位置が回転電機中心から半径方向外側へテーパー状に拡がるように形成されたことを特徴とする請求項１に記載の回転電機のコイル。 A plurality of winding portions in which the first bent portion and the second bent portion are sequentially stacked;
2. The coil of a rotating electrical machine according to claim 1, wherein the winding position of the non-coil end portion is formed so as to taper outward from the center of the rotating electrical machine in the radial direction. - 請求項２に記載の回転電機のコイルと、このコイルを固定する鉄心と、この鉄心を保持するセンターフレームとを備え、前記センターフレームに冷却水通路を設けたことを特徴とする回転電機。 A rotating electrical machine comprising the coil of the rotating electrical machine according to claim 2, an iron core that fixes the coil, and a center frame that holds the iron core, and a cooling water passage provided in the center frame.
- 前記コイルの非コイルエンド部において、
奇数番目の巻線部と偶数番目の巻線部は、曲げ位置を異ならせるとともに、少なくとも一部の外周の位置を異ならせたことを特徴とする請求項１に記載の回転電機のコイル。 In the non-coil end portion of the coil,
2. The coil for a rotating electrical machine according to claim 1, wherein the odd-numbered winding portion and the even-numbered winding portion have different bending positions and at least a part of the outer peripheral position. - 請求項４に記載の回転電機のコイルと、このコイルを固定する鉄心と、この鉄心を保持するセンターフレームと、このセンターフレームに結合されるフロントフレームおよびリアセンターフレームとを備え、前記センターフレーム、フロントフレームおよびリアセンターフレームからなるフレーム内部に冷却油を流通させる通路を設けたことを特徴とする回転電機。 A coil of the rotating electrical machine according to claim 4, an iron core that fixes the coil, a center frame that holds the iron core, and a front frame and a rear center frame that are coupled to the center frame, the center frame, A rotating electrical machine comprising a passage made of a front frame and a rear center frame through which cooling oil flows.
- 前記コイルの非コイルエンド部において、
奇数番目の巻線部と偶数番目の巻線部は、少なくとも一部の外周の位置を異ならせ、かつ、奇数番目の巻線と偶数番目の巻線の両方あるいは少なくとも一方の曲げ位置を回転電機の回転軸から半径方向外側にテーパー状に拡がるように構成したことを特徴とする請求項１に記載の回転電機のコイル。 In the non-coil end portion of the coil,
The odd-numbered winding portion and the even-numbered winding portion have at least a part of the outer periphery position different, and the odd-numbered winding and the even-numbered winding or at least one of the bending positions is a rotating electrical machine. The coil of the rotating electrical machine according to claim 1, wherein the coil is configured to extend in a tapered shape radially outward from the rotation axis. - 前記コイルのコイルエンド部において、
奇数番目の巻線部と偶数番目の巻線部は、曲げ位置を異ならせるとともに、前記奇数番目の巻線と偶数番目の巻線の少なくとも一部の外周の位置を異ならせたことを特徴とする請求項２または４に記載の回転電機のコイル。 In the coil end portion of the coil,
The odd-numbered winding part and the even-numbered winding part are characterized by having different bending positions and different positions of the outer periphery of at least a part of the odd-numbered winding and the even-numbered winding. The coil of the rotary electric machine according to claim 2 or 4. - 請求項１、２、４、６、７のいずれか１項に記載のコイルを備えたことを特徴とする回転電機。 A rotating electrical machine comprising the coil according to any one of claims 1, 2, 4, 6, and 7.
- 前記コイルの表面を熱伝導性に優れた樹脂でモールドして覆い、モールド内周側を固定子鉄心に当接させたことを特徴とする請求項１～８のいずれか１項に記載の回転電機。 The rotation according to any one of claims 1 to 8, wherein the surface of the coil is molded and covered with a resin excellent in thermal conductivity, and the inner peripheral side of the mold is brought into contact with the stator core. Electric.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201280074430.7A CN104412494B (en) | 2012-10-31 | 2012-10-31 | The coil of electric rotating machine and electric rotating machine |
| PCT/JP2012/078141 WO2014068695A1 (en) | 2012-10-31 | 2012-10-31 | Coil for rotary electric machine and rotary electric machine |
| JP2014544115A JP5769890B2 (en) | 2012-10-31 | 2012-10-31 | Rotating electric machine coil and rotating electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2012/078141 WO2014068695A1 (en) | 2012-10-31 | 2012-10-31 | Coil for rotary electric machine and rotary electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014068695A1 true WO2014068695A1 (en) | 2014-05-08 |
Family
ID=50626665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2012/078141 WO2014068695A1 (en) | 2012-10-31 | 2012-10-31 | Coil for rotary electric machine and rotary electric machine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5769890B2 (en) |
| CN (1) | CN104412494B (en) |
| WO (1) | WO2014068695A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018002105A (en) * | 2016-07-08 | 2018-01-11 | Ntn株式会社 | Electric linear motion actuator |
| WO2022239561A1 (en) * | 2021-05-12 | 2022-11-17 | 株式会社Top | Coil and rotary machine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020017143A1 (en) * | 2018-07-18 | 2020-01-23 | パナソニックＩｐマネジメント株式会社 | Motor |
| WO2020255614A1 (en) * | 2019-06-17 | 2020-12-24 | パナソニックＩｐマネジメント株式会社 | Coil, and stator, rotor, and motor equipped with same, and manufacturing method for coil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005304244A (en) * | 2004-04-15 | 2005-10-27 | Toyota Motor Corp | Coil for rotating electric machine, rotating electric machine, and manufacturing method of coil |
| JP2008228435A (en) * | 2007-03-12 | 2008-09-25 | Toyota Motor Corp | Method and apparatus for bending rectangular material edgewise |
| JP2009283591A (en) * | 2008-05-21 | 2009-12-03 | Toyota Motor Corp | Winding method, winding device, and stator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7026739B2 (en) * | 2003-05-23 | 2006-04-11 | Honda Motor Co., Ltd | Stator and insulating bobbin and a manufacturing method of the stator |
| JP5515656B2 (en) * | 2009-11-12 | 2014-06-11 | 株式会社明電舎 | Insulation structure of concentrated winding motor |
-
2012
- 2012-10-31 CN CN201280074430.7A patent/CN104412494B/en not_active Expired - Fee Related
- 2012-10-31 JP JP2014544115A patent/JP5769890B2/en not_active Expired - Fee Related
- 2012-10-31 WO PCT/JP2012/078141 patent/WO2014068695A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005304244A (en) * | 2004-04-15 | 2005-10-27 | Toyota Motor Corp | Coil for rotating electric machine, rotating electric machine, and manufacturing method of coil |
| JP2008228435A (en) * | 2007-03-12 | 2008-09-25 | Toyota Motor Corp | Method and apparatus for bending rectangular material edgewise |
| JP2009283591A (en) * | 2008-05-21 | 2009-12-03 | Toyota Motor Corp | Winding method, winding device, and stator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018002105A (en) * | 2016-07-08 | 2018-01-11 | Ntn株式会社 | Electric linear motion actuator |
| US10886808B2 (en) | 2016-07-08 | 2021-01-05 | Ntn Corporation | Electric linear actuator |
| WO2022239561A1 (en) * | 2021-05-12 | 2022-11-17 | 株式会社Top | Coil and rotary machine |
| JP7380997B2 (en) | 2021-05-12 | 2023-11-15 | 株式会社Top | Coil and rotating machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104412494B (en) | 2017-03-08 |
| CN104412494A (en) | 2015-03-11 |
| JPWO2014068695A1 (en) | 2016-09-08 |
| JP5769890B2 (en) | 2015-08-26 |
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