JP6200854B2 - Rotating electric machine stator - Google Patents
Rotating electric machine stator Download PDFInfo
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- JP6200854B2 JP6200854B2 JP2014110398A JP2014110398A JP6200854B2 JP 6200854 B2 JP6200854 B2 JP 6200854B2 JP 2014110398 A JP2014110398 A JP 2014110398A JP 2014110398 A JP2014110398 A JP 2014110398A JP 6200854 B2 JP6200854 B2 JP 6200854B2
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- 238000004804 winding Methods 0.000 claims description 70
- 230000005291 magnetic effect Effects 0.000 claims description 20
- 230000035699 permeability Effects 0.000 claims description 10
- 239000000696 magnetic material Substances 0.000 claims description 4
- 239000012212 insulator Substances 0.000 description 22
- 230000004907 flux Effects 0.000 description 10
- 230000009467 reduction Effects 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 239000003302 ferromagnetic material Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 210000001217 buttock Anatomy 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012772 electrical insulation material Substances 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Iron Core Of Rotating Electric Machines (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Description
本発明は、回転電機のステータに関する。 The present invention relates to a stator for a rotating electrical machine.
分割コアと、分割コアの一部を囲繞するインシュレータと、インシュレータを介して分割コアを巻回するコイルとを有するステータ片が環状に複数配置して形成された、回転電機のステータが特許文献1及び特許文献2に記載されている。 Patent Document 1 discloses a stator for a rotating electrical machine in which a plurality of stator pieces each having a split core, an insulator surrounding a part of the split core, and a coil that winds the split core via the insulator are arranged in an annular shape. And Patent Document 2.
図8は、従来の回転電機の軸方向に垂直な一部断面図である。図8に示すように、ロータ101の回転時に発生する磁束は、ステータ103のコイル105の一部を通過する。コイル105の磁束が通過した部分には渦電流が発生する。コイル105に渦電流が発生するとコイル105の温度が上昇するため望ましくない。 FIG. 8 is a partial cross-sectional view perpendicular to the axial direction of a conventional rotating electrical machine. As shown in FIG. 8, the magnetic flux generated when the rotor 101 rotates passes through a part of the coil 105 of the stator 103. An eddy current is generated in the portion of the coil 105 where the magnetic flux has passed. Generation of eddy current in the coil 105 is not desirable because the temperature of the coil 105 rises.
本発明の目的は、渦電流によるコイルの温度上昇を抑制可能な回転電機のステータを提供することである。 The objective of this invention is providing the stator of the rotary electric machine which can suppress the temperature rise of the coil by an eddy current.
上記の目的を達成するために、請求項1に記載の発明は、
周方向に沿って配置された複数のティース(例えば、後述の実施形態でのティース24b)を有するステータコア(例えば、後述の実施形態でのステータコア25)と、
前記ティースに巻回されるコイル(例えば、後述の実施形態でのコイル18)と、
前記ティースと前記コイルとを絶縁する絶縁部材(例えば、後述の実施形態でのインシュレータ26)と、を備えた、回転電機のステータであって、
径方向において前記回転電機のロータ(例えば、後述の実施形態でのロータ60)が配置される側とは反対側に、前記ステータコアを保持する保持部材(例えば、後述の実施形態でのホルダ12)を備え、
前記保持部材は、前記ステータコアよりも透磁率の高い磁性体によって構成され、
前記絶縁部材は、
前記コイルの巻線が巻回される巻回部本体(例えば、後述の実施形態での巻回部本体42)と、
前記巻回部本体の径方向内側端部に設けられる第1鍔部(例えば、後述の実施形態での内鍔部44)と、
前記巻回部本体の径方向外側端部に設けられる第2鍔部(例えば、後述の実施形態での外鍔部46)と、を有し、
前記第1鍔部及び前記第2鍔部の内、前記ロータと対向する一方の鍔部の径方向厚みが、他方の鍔部の径方向厚みよりも大きく、
前記第1鍔部の径方向厚みと前記第2鍔部の径方向厚みとの差が、前記保持部材の径方向厚みよりも大きい。
In order to achieve the above object, the invention described in claim 1
A stator core (e.g., a stator core 25 in an embodiment described later) having a plurality of teeth (e.g., teeth 24b in an embodiment described later) disposed along the circumferential direction;
A coil wound around the teeth (for example, a coil 18 in an embodiment described later);
A stator for a rotating electrical machine comprising an insulating member (for example, an insulator 26 in an embodiment described later) that insulates the teeth and the coil;
A holding member that holds the stator core (for example, a holder 12 in the later-described embodiment) on a side opposite to a side where the rotor of the rotating electrical machine (for example, the rotor 60 in the later-described embodiment) is disposed in the radial direction. With
The holding member is made of a magnetic material having a higher magnetic permeability than the stator core ,
The insulating member is
A winding part body around which the winding of the coil is wound (for example, a winding part body 42 in an embodiment described later);
A first flange (e.g., an inner flange 44 in an embodiment described later) provided at the radially inner end of the winding body;
A second collar part (for example, an outer collar part 46 in an embodiment described later) provided at the radially outer end of the winding part main body,
Of said first flange portion and the second flange portion, the radial thickness of the rotor and one of the flange portions facing is much larger than the radial thickness of the other flange,
The difference between the radial thickness of the radial thickness of said first flange portion and the second flange portion is not larger than the radial thickness of the retaining member.
請求項2に記載の発明では、請求項1に記載の発明において、
前記ロータは、前記回転電機の径方向内側に配置され、
前記保持部材は、前記ステータコアを径方向外側から保持する。
In the invention according to claim 2 , in the invention according to claim 1 ,
The rotor is disposed radially inward of the rotating electrical machine;
The holding member holds the stator core from the outside in the radial direction.
請求項1の発明によれば、ロータと対向するティースの端部からコイルまでの径方向距離は、絶縁部材のロータと対向する一方の鍔部の径方向厚み分が少なくとも確保され、当該一方の鍔部の径方向厚みは他方の鍔部の径方向厚みよりも大きい。ロータと対向する鍔部の径方向厚みが大きい分、コイルがロータから径方向に離れた構成であるため、ロータの回転時に発生する磁束がコイルを通過することによって発生する渦電流を低減できる。したがって、渦電流によるコイルの温度上昇を抑制できる。
また、ロータと対向する一方の鍔部の径方向厚みが他方の鍔部の径方向厚みに等しい構成のステータと比較して、ステータの外径を維持したまま前記一方の鍔部の径方向厚みを増すと、ステータコアを構成するバックヨークの径方向厚みが薄くなるが、請求項1の発明によれば、ステータコアをバックヨーク側から保持する保持部材が磁性体によって構成されている。このように、保持部材によってバックヨークの径方向厚みの低減が補償されているため、バックヨークの径方向厚みの低減による磁気飽和が抑制される。
また、保持部材はステータコアよりも透磁率の高い磁性体によって構成されているため、前記一方の鍔部の径方向厚みの増加分を保持部材の径方向厚みよりも大きくできる。したがって、ステータの外径を変えずにコイルにおける渦電流の発生を一層低減できる。
According to the first aspect of the present invention, the radial distance from the end portion of the teeth facing the rotor to the coil is at least the radial thickness of one flange portion facing the rotor of the insulating member, The radial thickness of the buttocks is greater than the radial thickness of the other buttocks. Since the radial thickness of the collar portion facing the rotor is large, the coil is configured to be separated from the rotor in the radial direction, so that the eddy current generated when the magnetic flux generated when the rotor rotates passes through the coil can be reduced. Therefore, the temperature rise of the coil due to the eddy current can be suppressed.
Further, the radial thickness of the one flange portion is maintained while maintaining the outer diameter of the stator as compared with a stator having a configuration in which the radial thickness of one flange portion facing the rotor is equal to the radial thickness of the other flange portion. However, according to the first aspect of the present invention, the holding member that holds the stator core from the back yoke side is made of a magnetic material. As described above, since the reduction in the radial thickness of the back yoke is compensated by the holding member, magnetic saturation due to the reduction in the radial thickness of the back yoke is suppressed.
Further, since the holding member is made of a magnetic material having a higher magnetic permeability than the stator core, an increase in the radial thickness of the one flange portion can be made larger than the radial thickness of the holding member. Therefore, the generation of eddy currents in the coil can be further reduced without changing the outer diameter of the stator.
請求項2の発明によれば、インナーロータ型の回転電機に適用できる。 According to the invention of claim 2 , it can be applied to an inner rotor type rotating electrical machine.
以下、本発明に係る回転電機のステータの実施形態について、図面を参照して説明する。 Hereinafter, embodiments of a stator of a rotating electrical machine according to the present invention will be described with reference to the drawings.
図1は、本実施形態に係る回転電機のステータ10の平面図である。ステータ10は、その内部に設けられる図示しないロータと組み合わされて回転電機を構成し、例えば、電動機又は発電機として用いられる。 FIG. 1 is a plan view of a stator 10 of a rotating electrical machine according to the present embodiment. The stator 10 constitutes a rotating electric machine in combination with a rotor (not shown) provided therein, and is used as, for example, an electric motor or a generator.
ステータ10は、いわゆる3相Y型結線の突極巻のステータであり、図1に示すように、中空状のホルダ12と、ホルダ12に設けられた3相の入力端子U、V、Wと、中性点を形成する中性端子Nと、ホルダ12の内周面12aに沿って複数(図1では18個)のステータ片14を環状に配置して形成される環状ステータ群16とを備えている。 The stator 10 is a so-called three-phase Y-type salient-pole stator, and as shown in FIG. 1, a hollow holder 12 and three-phase input terminals U, V, W provided on the holder 12 A neutral terminal N that forms a neutral point, and an annular stator group 16 that is formed by annularly arranging a plurality (18 in FIG. 1) of stator pieces 14 along the inner peripheral surface 12a of the holder 12. I have.
(環状ステータ群)
以下、環状ステータ群16について、図1〜図4を参照して詳細に説明する。図2は、図1に示すステータ10の軸方向に垂直な一部断面図である。図3は、図1に示すステータ片14の斜視図である。図4は、図3に示す分割コア24及びインシュレータ26の分解斜視図である。
(Annular stator group)
Hereinafter, the annular stator group 16 will be described in detail with reference to FIGS. FIG. 2 is a partial cross-sectional view perpendicular to the axial direction of the stator 10 shown in FIG. FIG. 3 is a perspective view of the stator piece 14 shown in FIG. 4 is an exploded perspective view of the split core 24 and the insulator 26 shown in FIG.
環状ステータ群16は、U相、V相、W相のコイル18をそれぞれ有するステータ片14を6つずつ含む。この場合、環状ステータ群16では、複数のステータ片14を環状に配置することにより、U相(U1相〜U6相)、V相(V1相〜V6相)、及び、W相(W1相〜W6相)の各コイル18が、図1の時計回りに、U1、V1、W1、U2、…、U6、V6、W6の順番に並ぶように配置される。換言すれば、環状ステータ群16は、後述する複数(図1では18個)の分割コア24が円環状に配列されて成るステータコア25と、ステータコア25の各分割コア24に巻線が巻回されたコイル18と、各分割コア24とコイル18とを絶縁するインシュレータ26とを備える。 The annular stator group 16 includes six stator pieces 14 each having U-phase, V-phase, and W-phase coils 18. In this case, in the annular stator group 16, the plurality of stator pieces 14 are arranged in an annular shape, whereby a U phase (U1 phase to U6 phase), a V phase (V1 phase to V6 phase), and a W phase (W1 phase to W1 phase). The coils 18 of (W6 phase) are arranged in the order of U1, V1, W1, U2,..., U6, V6, W6 in the clockwise direction of FIG. In other words, the annular stator group 16 has a stator core 25 in which a plurality of (18 in FIG. 1) divided cores 24 described later are arranged in an annular shape, and windings are wound around each divided core 24 of the stator core 25. And an insulator 26 that insulates each divided core 24 from the coil 18.
次に、U1相〜U6相、V1相〜V6相及びW1相〜W6相のコイル18を有する各ステータ片14のうち、代表的に、1個のステータ片14の構成について説明する。なお、ここで説明するステータ片14の構成は、全ての相のステータ片14に共通する構成である。 Next, among the stator pieces 14 having the coils 18 of the U1 phase to U6 phase, the V1 phase to V6 phase, and the W1 phase to W6 phase, the configuration of one stator piece 14 will be described representatively. In addition, the structure of the stator piece 14 demonstrated here is a structure common to the stator piece 14 of all the phases.
図3及び図4に示すように、ステータ片14は、プレスにより打ち抜いた略T字状の電磁鋼板22をステータ10の回転軸方向(矢印A方向)に複数枚積層して構成される分割コア24と、分割コア24を電気的に絶縁するインシュレータ26と、インシュレータ26を介して分割コア24に巻線18aが巻回されたコイル18とを有する。巻線18aは、断面長方形状の平角線である。 As shown in FIGS. 3 and 4, the stator piece 14 is a divided core formed by laminating a plurality of substantially T-shaped electromagnetic steel plates 22 punched by pressing in the rotation axis direction (arrow A direction) of the stator 10. 24, an insulator 26 that electrically insulates the split core 24, and a coil 18 in which a winding 18 a is wound around the split core 24 via the insulator 26. The winding 18a is a rectangular wire having a rectangular cross section.
分割コア24は、ステータ10の径方向外側(矢印Bに示すB1側)において、ステータ10の円周方向(矢印C方向)に沿って延在するバックヨーク24aと、バックヨーク24aから径方向内側(矢印Bに示すB2側)に向かって延在するティース24bと、ティース24bの径方向内側端においてステータ10の回転軸方向(矢印A方向)に沿って矢印Cに示すC1側及びC2側へそれぞれ延在した矩形状の耳部24cとから構成される。また、バックヨーク24aの矢印Cに示すC2側の端部には、略半円状の嵌合凹部32が形成され、バックヨーク24aの矢印Cに示すC1側の端部には、嵌合凹部32に対応した略半円状の嵌合凸部34が形成されている。バックヨーク24aの嵌合凹部32と嵌合凸部34とは、複数の分割コア24が円環状に配列されてステータコア25を形成するとき、互いに嵌合して各分割コア24を位置決めする。 The split core 24 includes a back yoke 24a extending along the circumferential direction (arrow C direction) of the stator 10 on the radially outer side (B1 side indicated by arrow B) of the stator 10, and a radially inner side from the back yoke 24a. Teeth 24b extending toward (B2 side indicated by arrow B), and toward the C1 side and C2 side indicated by arrow C along the rotation axis direction (arrow A direction) of stator 10 at the radially inner end of teeth 24b. Each of them extends from a rectangular ear portion 24c. A substantially semicircular fitting recess 32 is formed at the end of the back yoke 24a on the C2 side indicated by the arrow C, and a fitting recess is formed at the end of the back yoke 24a on the C1 side indicated by the arrow C. A substantially semicircular fitting projection 34 corresponding to 32 is formed. When the plurality of divided cores 24 are arranged in an annular shape to form the stator core 25, the fitting concave portions 32 and the fitting convex portions 34 of the back yoke 24a are fitted to each other to position each divided core 24.
インシュレータ26は、可撓性を有する樹脂等の電気絶縁材料で構成された、分割コア24とコイル18とを絶縁するための絶縁ボビンである。インシュレータ26は、コイル18の巻線18aが巻回される巻回部38と、巻回部38から矢印Bに示すB1側に突出し、巻線18aを矢印C方向に沿って引き回して案内するための案内部40と、を有している。 The insulator 26 is an insulating bobbin that is made of an electrically insulating material such as a flexible resin and that insulates the split core 24 from the coil 18. The insulator 26 is wound around the winding portion 38 around which the winding 18a of the coil 18 is wound, and protrudes from the winding portion 38 to the B1 side indicated by the arrow B, so as to guide the winding 18a along the direction of the arrow C. The guide part 40 is provided.
巻回部38は、矢印A方向に嵌合可能な上側巻回部38aと、下側巻回部38bと、から構成される。 The winding portion 38 includes an upper winding portion 38a that can be fitted in the direction of arrow A and a lower winding portion 38b.
上側巻回部38aは、断面略U字状に形成された上側巻回部本体42aと、上側巻回部本体42aの径方向内側(矢印Bに示すB2側)の端部に立設する上側内鍔部44aと、上側内鍔部44aと対向するように、上側巻回部本体42aの径方向外側(矢印Bに示すB1側)の端部に立設する上側外鍔部46aと、を有する。 The upper winding portion 38a has an upper winding portion main body 42a formed in a substantially U-shaped cross section, and an upper side standing on the end portion on the radially inner side (B2 side indicated by arrow B) of the upper winding portion main body 42a. An inner flange portion 44a, and an upper outer flange portion 46a erected on the end portion on the radially outer side (B1 side indicated by arrow B) of the upper winding portion main body 42a so as to face the upper inner flange portion 44a. Have.
下側巻回部38bは、上側巻回部本体42aと対向するように断面略U字状に形成された下側巻回部本体42bと、上側内鍔部44aと対向するように下側巻回部本体42bの径方向内側(矢印Bに示すB2側)の端部に立設する下側内鍔部44bと、下側内鍔部44bと対向するように下側巻回部本体42bの径方向外側(矢印Bに示すB1側)の端部に立設する下側外鍔部46bと、を有する。 The lower winding part 38b has a lower winding part body 42b formed in a substantially U-shaped cross section so as to face the upper winding part body 42a and a lower winding part so as to face the upper inner flange part 44a. A lower inner flange portion 44b erected on the radially inner end (B2 side indicated by arrow B) of the rotating portion main body 42b, and the lower winding portion main body 42b so as to face the lower inner flange portion 44b. And a lower outer flange portion 46b erected on the end portion on the radially outer side (B1 side indicated by arrow B).
分割コア24のティース24bを挟み込むように上側巻回部38aと下側巻回部38bとを嵌合させると、上側巻回部本体42aと下側巻回部本体42b、上側内鍔部44aと下側内鍔部44b、上側外鍔部46aと下側外鍔部46bがそれぞれ一部重なり合って結合することで上側巻回部38aと下側巻回部38bとが一体化されて、巻回部38が構成される。上側巻回部38aと下側巻回部38bとが一体化して構成された巻回部38には、コイル18の巻線18aが巻回される巻回部本体42と、巻回部本体42の径方向内側(矢印Bに示すB2側)の端部に設けられる内鍔部44と、内鍔部44と対向するように巻回部本体42の径方向外側(矢印Bに示すB1側)の端部に設けられる外鍔部46とが形成される。内鍔部44の径方向(矢印B方向)の厚みは、外鍔部46の径方向(矢印B方向)の厚みよりも大きくなっている。 When the upper winding portion 38a and the lower winding portion 38b are fitted so as to sandwich the teeth 24b of the split core 24, the upper winding portion main body 42a, the lower winding portion main body 42b, the upper inner flange portion 44a, The lower inner flange portion 44b, the upper outer flange portion 46a, and the lower outer flange portion 46b are partially overlapped and coupled to each other so that the upper winding portion 38a and the lower winding portion 38b are integrated, and the winding is performed. Part 38 is configured. The winding portion 38 formed by integrating the upper winding portion 38a and the lower winding portion 38b includes a winding portion main body 42 around which the winding 18a of the coil 18 is wound, and a winding portion main body 42. An inner flange portion 44 provided at an end portion on the radially inner side (B2 side indicated by arrow B), and a radially outer side of the winding portion main body 42 so as to face the inner flange portion 44 (B1 side indicated by arrow B) And an outer flange portion 46 provided at the end portion of the outer periphery. The thickness in the radial direction (arrow B direction) of the inner flange portion 44 is larger than the thickness in the radial direction (arrow B direction) of the outer flange portion 46.
内鍔部44の径方向内側(矢印Bに示すB2側)の端部には、矩形状の凸部43がステータ10の回転軸方向(矢印A方向)に沿って矢印Cに示すC1側に延在し、凸部43に対応した矩形状の凹部45が同軸方向に沿って矢印Cに示すC2側に延在している。内鍔部44の凸部43と凹部45とは、インシュレータ26によって囲繞された複数の分割コア24が円環状に配列されてステータコア25を形成するとき互いにクランク状に対応する。 At the end on the radially inner side (B2 side indicated by arrow B) of the inner flange portion 44, a rectangular convex portion 43 is provided on the C1 side indicated by arrow C along the rotation axis direction (arrow A direction) of the stator 10. A rectangular concave portion 45 corresponding to the convex portion 43 extends to the C2 side indicated by the arrow C along the coaxial direction. The convex portion 43 and the concave portion 45 of the inner flange portion 44 correspond to each other in a crank shape when the plurality of divided cores 24 surrounded by the insulator 26 are arranged in an annular shape to form the stator core 25.
巻回部38の中央部には、矢印B方向に沿って孔48が形成される。孔48に分割コア24のティース24bが嵌まり込む一方で、巻回部38における内鍔部44と外鍔部46との間の巻回部本体42には巻線18aが巻回されてコイル18のコイル巻線部21が構成される。なお、ティース24bの径方向内側の端部からコイル巻線部21までの径方向距離は、インシュレータ26の内鍔部44の径方向厚みが確保される。したがって、内鍔部44の径方向厚みが大きい分、コイル巻線部21は回転電機のロータから径方向外側(矢印Bに示すB1側)に離れた構成となる。 A hole 48 is formed in the center of the winding portion 38 along the direction of arrow B. While the teeth 24 b of the split core 24 are fitted into the holes 48, the winding 18 a is wound around the winding portion main body 42 between the inner flange portion 44 and the outer flange portion 46 in the winding portion 38. 18 coil winding portions 21 are formed. The radial distance from the radially inner end of the tooth 24b to the coil winding portion 21 ensures the radial thickness of the inner flange portion 44 of the insulator 26. Accordingly, the coil winding portion 21 is separated from the rotor of the rotating electrical machine to the outside in the radial direction (B1 side indicated by arrow B) by the amount of the radial thickness of the inner flange portion 44 being large.
一方、案内部40は、上側外鍔部46aの上端部近傍から矢印Bに示すB1側に突出するように設けられている。 On the other hand, the guide portion 40 is provided so as to protrude from the vicinity of the upper end portion of the upper outer flange portion 46a to the B1 side indicated by the arrow B.
案内部40は、板状部材50と、板状部材50上に形成され、図1の平面視で略U字状の導線収容部52と、導線収容部52の背後(矢印Bに示すB2側の背面における矢印C1方向側の箇所)に形成され、巻回部38に巻回された巻線18aの終端部を固定する終端固定部54と、から構成される。導線収容部52には矢印C方向に沿って延在した複数の導線端部保持溝が設けれ、巻回部38から引き出されて終端固定部54に固定された巻線18aが、導線端部保持溝内を矢印C方向に引き回される。このように、環状ステータ群16を構成する複数のステータ片14の導線収容部52に亘って巻線18aが矢印C方向に引き回されて、コイル18のコイル端末部19が構成される。 The guide portion 40 is formed on the plate-like member 50 and the plate-like member 50, and has a substantially U-shaped lead wire receiving portion 52 in the plan view of FIG. 1 and a back side of the lead wire receiving portion 52 (B2 side indicated by arrow B) And an end fixing portion 54 for fixing the end portion of the winding 18a wound around the winding portion 38. The conductor accommodating portion 52 is provided with a plurality of conductor end holding grooves extending along the direction of arrow C, and the winding 18a that is pulled out from the winding portion 38 and fixed to the terminal fixing portion 54 is connected to the conductor end portion. The inside of the holding groove is drawn in the direction of arrow C. In this way, the winding 18a is drawn in the direction of the arrow C across the conductor housing portions 52 of the plurality of stator pieces 14 constituting the annular stator group 16, and the coil terminal portion 19 of the coil 18 is configured.
(ホルダ)
次に、環状ステータ群16を保持するホルダ12について、図1及び図2を参照して詳細に説明する。
(holder)
Next, the holder 12 that holds the annular stator group 16 will be described in detail with reference to FIGS. 1 and 2.
ホルダ12は、ステータ10の回転軸方向に延びる円環部12bと、円環部12bの軸方向端部から外周側に延びるフランジ部12cと、を有する。ホルダ12の内周面12aには環状ステータ群16が圧入され、ホルダ12は、環状ステータ群16を径方向外側から保持する。また、フランジ部12cに設けられた複数のボルト孔12dにボルトを挿通することによって、ホルダ12によって保持された環状ステータ群16がハウジング(不図示)に固定される。 The holder 12 includes an annular portion 12b extending in the rotation axis direction of the stator 10 and a flange portion 12c extending from the axial end portion of the annular portion 12b to the outer peripheral side. An annular stator group 16 is press-fitted into the inner peripheral surface 12a of the holder 12, and the holder 12 holds the annular stator group 16 from the radially outer side. Moreover, the annular stator group 16 held by the holder 12 is fixed to a housing (not shown) by inserting bolts into a plurality of bolt holes 12d provided in the flange portion 12c.
ホルダ12は、分割コア24よりも透磁率の高い材料によって構成される。すなわち、ホルダ12は強磁性体である。円環部12bは、図2に示すように、径方向(矢印B方向)に対する一定の厚みtを有する。 The holder 12 is made of a material having a higher magnetic permeability than the split core 24. That is, the holder 12 is a ferromagnetic body. As shown in FIG. 2, the annular portion 12 b has a constant thickness t with respect to the radial direction (arrow B direction).
次に、インシュレータ26の内鍔部44及び外鍔部46の各径方向厚みと、ホルダ12の透磁率及び径方向厚みとの関係について、図2及び図5を参照して説明する。図5は、図8に示した従来のステータの構成と図2に示した本発明に係る一実施形態のステータ10の構成とを比較する図である。 Next, the relationship between the radial thicknesses of the inner flange portion 44 and the outer flange portion 46 of the insulator 26 and the magnetic permeability and radial thickness of the holder 12 will be described with reference to FIGS. 2 and 5. FIG. 5 is a diagram comparing the configuration of the conventional stator shown in FIG. 8 with the configuration of the stator 10 of one embodiment according to the present invention shown in FIG.
本実施形態では、分割コア24よりも透磁率の高い材料によって構成されたホルダ12の径方向厚みtよりも、インシュレータ26の内鍔部44の径方向厚みs1と外鍔部46の径方向厚みs2との差が大きくなるよう、内鍔部44の径方向厚みが設計される。すなわち、「s1−s2=t+α」(α>0)の関係を有するよう、内鍔部44の径方向厚みs1が設計される。なお、ホルダ12を含むステータ10の外径は、図8に示した従来の回転電機のステータ103の外径以下であることが望ましい。 In the present embodiment, the radial thickness s1 of the inner flange portion 44 of the insulator 26 and the radial thickness of the outer flange portion 46 are larger than the radial thickness t of the holder 12 made of a material having higher permeability than the split core 24. The radial thickness of the inner flange portion 44 is designed so that the difference from s2 becomes large. That is, the radial thickness s1 of the inner flange portion 44 is designed so as to have a relationship of “s1−s2 = t + α” (α> 0). The outer diameter of the stator 10 including the holder 12 is preferably equal to or smaller than the outer diameter of the stator 103 of the conventional rotating electric machine shown in FIG.
ステータの外径が同一との前提で、図8に示した従来の構成と図2に示した本実施形態の構成とを比較すると、図5に示すように内鍔部44の径方向厚みを増して、コイル巻線部21の径方向長さを維持すれば、分割コア24を構成するバックヨーク24aの径方向厚みが、内鍔部44の径方向厚みを増した分だけ薄くなる。径方向厚みが薄いバックヨークは磁気飽和してトルクが減少するが、本実施形態では、上述したように、強磁性体によって構成されたホルダ12によってバックヨーク24aの径方向厚みの低減が補償されている。したがって、図8に示した従来の回転電機のステータ103と比較して、本実施形態のステータ10が外径を維持したまま「s1−s2=t+α」の関係を有するためには、バックヨーク24aの径方向厚みがt+αだけ狭くなった(L→L−(t+α))場合でも、分割コア24のバックヨーク24a及びホルダ12を鎖交する磁束が、従来のステータ103のバックヨークを鎖交する磁束以上であるとの条件を満たせば良い。当該条件は、下記式(1)によって表される。 Comparing the conventional configuration shown in FIG. 8 with the configuration of the present embodiment shown in FIG. 2 on the assumption that the outer diameter of the stator is the same, the radial thickness of the inner flange portion 44 is as shown in FIG. In addition, if the radial length of the coil winding portion 21 is maintained, the radial thickness of the back yoke 24a constituting the split core 24 becomes thinner by the increase of the radial thickness of the inner flange portion 44. Although the back yoke with a small radial thickness is magnetically saturated and the torque is reduced, in this embodiment, as described above, the reduction in the radial thickness of the back yoke 24a is compensated by the holder 12 made of a ferromagnetic material. ing. Therefore, compared with the stator 103 of the conventional rotating electric machine shown in FIG. 8, in order for the stator 10 of this embodiment to have the relationship of “s1−s2 = t + α” while maintaining the outer diameter, the back yoke 24a Even when the thickness in the radial direction is reduced by t + α (L → L− (t + α)), the magnetic flux interlinking the back yoke 24a of the split core 24 and the holder 12 interlinks the back yoke of the conventional stator 103. What is necessary is just to satisfy the conditions that it is more than magnetic flux. The condition is expressed by the following formula (1).
μst:分割コア24の透磁率
μhol:ホルダ12の透磁率
H:磁場
L:従来のステータ103のバックヨークの径方向厚み
Δx:ステータの周方向の単位長さ
μst: permeability of the split core 24 μhol: permeability of the holder 12 H: magnetic field L: radial thickness of the back yoke of the conventional stator 103 Δx: unit length in the circumferential direction of the stator
式(1)の左辺は、従来のステータ103のバックヨークを鎖交する磁束を示す。なお、従来のステータ103のホルダは樹脂等の非磁性体によって構成されている。また、式(1)の右辺は、本実施形態のステータ10においてホルダ12を鎖交する磁束とバックヨーク24aを鎖交する磁束との和を示す。 The left side of Equation (1) indicates the magnetic flux that links the back yoke of the conventional stator 103. The conventional holder of the stator 103 is made of a nonmagnetic material such as resin. Moreover, the right side of Formula (1) shows the sum of the magnetic flux which links the holder 12 in the stator 10 of this embodiment, and the magnetic flux which links the back yoke 24a.
式(1)の右辺に含まれるαは、外鍔部46に対する内鍔部44の径方向厚みの差(t+α=s1−s2)を、ホルダ12の径方向厚みt以上に厚くできる値を示し、式(1)から下記式(2)が導出される。 Α included in the right side of Expression (1) indicates a value that can increase the radial thickness difference (t + α = s1−s2) of the inner flange portion 44 with respect to the outer flange portion 46 to be greater than the radial thickness t of the holder 12. The following formula (2) is derived from the formula (1).
本実施形態では、インシュレータ26の外鍔部46に対する内鍔部44の径方向厚みの差(s1−s2)がホルダ12の径方向厚みt以上(すなわちt+α)となるよう、式(2)に示した条件を満たす範囲において、内鍔部44の径方向厚みs1が設定される。 In the present embodiment, the difference (s1−s2) in the radial thickness of the inner flange portion 44 with respect to the outer flange portion 46 of the insulator 26 is equal to or greater than the radial thickness t of the holder 12 (ie, t + α). In the range that satisfies the conditions shown, the radial thickness s1 of the inner collar portion 44 is set.
以上説明したように、本実施形態では、インシュレータ26の内鍔部44の径方向厚みs1が、外鍔部46の径方向厚みs2よりも大きい。分割コア24のティース24bの径方向内側の端部からコイル18のコイル巻線部21までの径方向距離は、内鍔部44の径方向厚みs1分が確保されるため、内鍔部44の径方向厚みs1が大きい分、コイル巻線部21は回転電機のロータから径方向外側(矢印Bに示すB1側)に離れた構成となる。その結果、図6に示すように、ロータ60の回転時に発生する磁束がコイル18を通過する量が減り、コイル18に発生する渦電流を低減できる。したがって、渦電流によるコイル18の温度上昇を抑制できる。 As described above, in the present embodiment, the radial thickness s1 of the inner flange portion 44 of the insulator 26 is larger than the radial thickness s2 of the outer flange portion 46. The radial distance from the radially inner end of the teeth 24b of the split core 24 to the coil winding portion 21 of the coil 18 is secured by the radial thickness s1 of the inner flange portion 44. Since the radial thickness s1 is large, the coil winding portion 21 is separated from the rotor of the rotating electrical machine radially outward (B1 side indicated by arrow B). As a result, as shown in FIG. 6, the amount of magnetic flux generated when the rotor 60 rotates through the coil 18 is reduced, and eddy current generated in the coil 18 can be reduced. Therefore, the temperature rise of the coil 18 due to the eddy current can be suppressed.
ステータ10の外径を従来に維持したまま、コイル巻線部21を回転電機のロータ60から径方向外側(矢印Bに示すB1側)に離した構成とすると、分割コア24のバックヨーク24aの径方向厚みが薄くなるが、本実施形態では、ホルダ12が強磁性体によって構成されている。このように、ホルダ12によってバックヨーク24aの径方向厚みの低減が補償されているため、バックヨーク24aの径方向厚みの低減による磁気飽和が抑制される。 If the coil winding portion 21 is separated from the rotor 60 of the rotating electrical machine to the outside in the radial direction (B1 side indicated by the arrow B) while maintaining the outer diameter of the stator 10 as before, the back yoke 24a of the split core 24 is Although the radial thickness is reduced, in this embodiment, the holder 12 is made of a ferromagnetic material. As described above, since the reduction in the radial thickness of the back yoke 24a is compensated by the holder 12, magnetic saturation due to the reduction in the radial thickness of the back yoke 24a is suppressed.
さらに、ホルダ12の透磁率は分割コア24の透磁率よりも高いため、内鍔部44の径方向厚みs1と外鍔部46の径方向厚みs2との差(s1−s2)がホルダ12の径方向厚みt以上となるよう、内鍔部44の径方向厚みs1が設定される。すなわち、内鍔部44の径方向厚みs1は、ステータ10の外径を維持したまま、上記式(2)の条件を満たす範囲において「s2+t+α」に設定される。このように、内鍔部44の径方向厚みs1が大きければ、コイル18のコイル巻線部21が回転電機のロータ60から径方向外側(矢印Bに示すB1側)に一層離れた構成を実現できる。したがって、ステータの外径を変えずにコイルにおける渦電流の発生を一層低減できる。 Furthermore, since the magnetic permeability of the holder 12 is higher than the magnetic permeability of the split core 24, the difference (s 1 −s 2) between the radial thickness s 1 of the inner flange portion 44 and the radial thickness s 2 of the outer flange portion 46 is The radial thickness s1 of the inner flange portion 44 is set so as to be equal to or greater than the radial thickness t. That is, the radial thickness s1 of the inner flange portion 44 is set to “s2 + t + α” in a range that satisfies the condition of the above expression (2) while maintaining the outer diameter of the stator 10. As described above, when the radial thickness s1 of the inner flange portion 44 is large, the coil winding portion 21 of the coil 18 is further separated from the rotor 60 of the rotating electrical machine to the radially outer side (B1 side indicated by the arrow B). it can. Therefore, the generation of eddy currents in the coil can be further reduced without changing the outer diameter of the stator.
なお、本実施形態では、ホルダ12が強磁性体によって構成されるが、ホルダ12の円環部12bのみが強磁性体によって構成されても良い。 In the present embodiment, the holder 12 is made of a ferromagnetic material, but only the annular portion 12b of the holder 12 may be made of a ferromagnetic material.
さらに、本実施形態では、インシュレータ26は、可撓性を有する樹脂等の電気絶縁材料で構成されている。また、図4に示すように、インシュレータ26は、分割コア24のティース24bを挟み込んで一体化できるよう、2つに分割して成形される。図4に示した上側巻回部38a及び下側巻回部38bは断面略U字状に形成されるが、特に下側巻回部38bが成形後に収縮すると、図7に示すように、ティース24bを挟み込むための孔48の開口幅が狭くなる「倒れ込み」が発生する。「倒れ込み」が発生すると、下側巻回部38bの孔48にティース24bを挿入する際の作業性が低下する。しかし、本実施形態では、インシュレータ26の内鍔部44の径方向厚みs1が大きいため、収縮による「倒れ込み」の程度が小さい。その結果、下側巻回部38bの孔48にティース24bを挿入する際の作業性が悪化しない。 Furthermore, in this embodiment, the insulator 26 is comprised with electrical insulation materials, such as resin which has flexibility. Moreover, as shown in FIG. 4, the insulator 26 is divided | segmented into two and shape | molded so that the teeth 24b of the division | segmentation core 24 may be inserted | pinched and integrated. The upper winding portion 38a and the lower winding portion 38b shown in FIG. 4 are formed to have a substantially U-shaped cross section, and particularly when the lower winding portion 38b contracts after molding, as shown in FIG. “Falling” occurs in which the opening width of the hole 48 for sandwiching 24b becomes narrow. When “falling” occurs, workability when inserting the teeth 24b into the holes 48 of the lower winding portion 38b is lowered. However, in this embodiment, since the radial thickness s1 of the inner flange portion 44 of the insulator 26 is large, the degree of “falling” due to contraction is small. As a result, workability when inserting the tooth 24b into the hole 48 of the lower winding part 38b is not deteriorated.
また、インシュレータ26の内鍔部44の径方向厚みs1が大きいため、冷熱耐久性及び振動耐久性を含む強度が高く、絶縁性に影響するクラック等が内鍔部44に発生する可能性を低減できる。 Moreover, since the radial thickness s1 of the inner flange portion 44 of the insulator 26 is large, the strength including the thermal durability and the vibration durability is high, and the possibility of occurrence of cracks and the like affecting the insulating property in the inner flange portion 44 is reduced. it can.
なお、本発明は、前述した実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。上記実施形態では、インナーロータ型の回転電機について説明したが、本発明はアウターロータ型の回転電機にも適用可能である。 In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. Although the inner rotor type rotating electrical machine has been described in the above embodiment, the present invention is also applicable to an outer rotor type rotating electrical machine.
10 ステータ
12 ホルダ
12b 円環部
12c フランジ部
14 ステータ片
16 環状ステータ群
18 コイル
18a 巻線
19 コイル端末部
21 コイル巻線部
24 分割コア
24a バックヨーク
24b ティース
25 ステータコア
26 インシュレータ(絶縁部材)
38 巻回部
38a 上側巻回部
38b 下側巻回部
40 案内部
42 巻回部本体
42a 上側巻回部本体
42b 下側巻回部本体
43 凸部
44 内鍔部
44a 上側内鍔部
44b 下側内鍔部
45 凹部
46 外鍔部
46a 上側外鍔部
46b 下側外鍔部
48 孔
50 板状部材
52 導線収容部
54 終端固定部
60 ロータ
DESCRIPTION OF SYMBOLS 10 Stator 12 Holder 12b Ring part 12c Flange part 14 Stator piece 16 Annular stator group 18 Coil 18a Winding 19 Coil end part 21 Coil winding part 24 Split core 24a Back yoke 24b Teeth 25 Stator core 26 Insulator (insulating member)
38 winding part 38a upper winding part 38b lower winding part 40 guide part 42 winding part main body 42a upper winding part main body 42b lower winding part main body 43 convex part 44 inner collar part 44a upper inner collar part 44b lower Side inner flange 45 Recess 46 Outer flange 46a Upper outer flange 46b Lower outer flange 48 Hole 50 Plate-like member 52 Conductive wire receiving portion 54 Terminal fixing portion 60 Rotor
Claims (2)
前記ティースに巻回されるコイルと、
前記ティースと前記コイルとを絶縁する絶縁部材と、を備えた、回転電機のステータであって、
径方向において前記回転電機のロータが配置される側とは反対側に、前記ステータコアを保持する保持部材を備え、
前記保持部材は、前記ステータコアよりも透磁率の高い磁性体によって構成され、
前記絶縁部材は、
前記コイルの巻線が巻回される巻回部本体と、
前記巻回部本体の径方向内側端部に設けられる第1鍔部と、
前記巻回部本体の径方向外側端部に設けられる第2鍔部と、を有し、
前記第1鍔部及び前記第2鍔部の内、前記ロータと対向する一方の鍔部の径方向厚みが、他方の鍔部の径方向厚みよりも大きく、
前記第1鍔部の径方向厚みと前記第2鍔部の径方向厚みとの差が、前記保持部材の径方向厚みよりも大きい、回転電機のステータ。 A stator core having a plurality of teeth arranged along the circumferential direction;
A coil wound around the teeth;
A stator for a rotating electrical machine, comprising: an insulating member that insulates the teeth and the coil;
A holding member for holding the stator core is provided on a side opposite to a side where the rotor of the rotating electrical machine is disposed in the radial direction
The holding member is made of a magnetic material having a higher magnetic permeability than the stator core ,
The insulating member is
A winding part body around which the winding of the coil is wound;
A first brim provided at a radially inner end of the wound body;
A second flange provided at a radially outer end of the wound body,
Of said first flange portion and the second flange portion, the radial thickness of the rotor and one of the flange portions facing is much larger than the radial thickness of the other flange,
The difference between the radial thickness of the first flange portion and said second flange portion in the radial direction thickness, not greater than the radial thickness of the holding member, the rotary electric machine stator.
前記ロータは、前記回転電機の径方向内側に配置され、
前記保持部材は、前記ステータコアを径方向外側から保持する、回転電機のステータ。 A stator for a rotating electrical machine according to claim 1 ,
The rotor is disposed radially inward of the rotating electrical machine;
The holding member is a stator of a rotating electrical machine that holds the stator core from a radially outer side.
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