JP5293280B2 - Stator - Google Patents

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JP5293280B2
JP5293280B2 JP2009052170A JP2009052170A JP5293280B2 JP 5293280 B2 JP5293280 B2 JP 5293280B2 JP 2009052170 A JP2009052170 A JP 2009052170A JP 2009052170 A JP2009052170 A JP 2009052170A JP 5293280 B2 JP5293280 B2 JP 5293280B2
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iron core
stator
core
split
gap
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JP2010207027A (en
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雅志 井上
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Honda Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator which can improve the efficiency of a motor that is able to relax the stress that acts on segmental cores from shrink fitting or press fitting. <P>SOLUTION: The stator 10 includes a housing 20, an annular stator holder 30 attached to the housing 20, and an annular stator group 40 press-fitted and fixed in the stator holder 30 with a plurality of stator pieces 41 arrayed in annular form. Each stator piece 41 has a segmental iron core 50, in which a plurality of electromagnetic steel plates are stacked; an insulating member 60, which insulates the segmental iron core 50; and a stator coil 42, which is wound around the segmental iron core 50 via the insulating member 60. The segmental iron core 50 comprises a first core 51 and a second core 52, and the first core 51 has an engaging hole 55, which extends in a circumferential direction in its yoke part 53, and the second core 52 is engaged with the engaging groove 55, at a specified clearance C. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、ステータに関し、より詳細には、電動機や発電機等の回転電機に用いられるステータに関する。   The present invention relates to a stator, and more particularly to a stator used in a rotating electric machine such as an electric motor or a generator.

従来の電動機や発電機等のステータでは、ステータコアはハウジングに焼きばめや圧入によって固定されるのが一般的である。しかし、焼きばめや圧入による応力がヨーク部に作用すると、ヨーク部の鉄損が増加して電動機の効率が低下する問題があった。そして、この応力抑制を図った従来技術として、ヨーク部の外周面に切欠き部を設けると共に、ティース部に対応する外周側に貫通穴及びリブを形成し、このリブをハウジングに焼きばめや圧入してステータコアをハウジングに固定することによって、ヨーク部に作用する応力を低減させ、鉄損の増加、即ち、電動機の効率低下を抑制するようにした電動機が知られている(例えば、特許文献1参照)。また、ステータコアの外周部に締付け応力緩衝穴を設け、ステータホルダへの焼きばめや圧入によってステータコアに発生する応力を緩和するようにした密閉型電動圧縮機が知られている(例えば、特許文献2参照)。さらに、円環状に配列された複数の分割鉄心のヨーク部に応力分布変更のための孔部を設け、ステータホルダへの焼きばめや圧入によって分割鉄心に発生する応力を緩和するようにした磁石モータが知られている(例えば、特許文献3参照)。   In conventional stators such as electric motors and generators, the stator core is generally fixed to the housing by shrink fitting or press fitting. However, when stress due to shrink fitting or press-fitting acts on the yoke portion, there is a problem that the iron loss of the yoke portion increases and the efficiency of the motor decreases. As a conventional technique for suppressing the stress, a notch portion is provided on the outer peripheral surface of the yoke portion, and a through hole and a rib are formed on the outer peripheral side corresponding to the tooth portion. An electric motor is known in which the stress acting on the yoke portion is reduced by press-fitting and fixing the stator core to the housing, thereby suppressing an increase in iron loss, that is, a reduction in efficiency of the electric motor (for example, Patent Documents). 1). Also, a hermetic electric compressor is known in which a tightening stress buffering hole is provided in the outer periphery of the stator core so as to relieve stress generated in the stator core by shrink fitting or press-fitting into the stator holder (for example, Patent Documents). 2). Further, a magnet is provided with holes for changing the stress distribution in the yokes of a plurality of split cores arranged in an annular shape so as to relieve stress generated in the split cores by shrink fitting or press fitting into the stator holder. A motor is known (see, for example, Patent Document 3).

特開2005−080451号公報Japanese Patent Laid-Open No. 2005-080451 特開2006−115581号公報JP 2006-115581 A 特開2002−136013号公報JP 2002-136003 A

しかしながら、上記特許文献1に記載の電動機によると、ヨーク部の外周部での応力は切欠き部の応力緩和作用によって低くなるものの、内周部での応力が高く、応力分布にバラツキが見られるので、電動機の効率低下を抑制するために更なる応力低減が望まれていた。また、ステータコアは、接触面積が小さなリブだけでハウジングに固定されているので、抜け荷重やスリップトルクが小さくなるという課題があった。また、上記特許文献2に記載の密閉型電動圧縮機も同様に、締付け応力緩衝穴が設けられた部分と、それ以外の部分との間で応力分布にバラツキが生じる可能性があった。また、上記特許文献3に記載の磁石モータによると、孔部がヨーク部の周方向及び径方向の中心部近傍に形成されるため、分割鉄心を通る磁束の流れが孔部により妨げられ、モータの効率が低下してしまう可能性があった。   However, according to the electric motor described in Patent Document 1, the stress at the outer peripheral portion of the yoke portion is reduced by the stress relaxation action of the notch portion, but the stress at the inner peripheral portion is high, and the stress distribution varies. Therefore, further stress reduction has been desired in order to suppress a reduction in the efficiency of the electric motor. Further, since the stator core is fixed to the housing with only a rib having a small contact area, there is a problem that a falling load and a slip torque are reduced. Similarly, in the hermetic electric compressor described in Patent Document 2, there is a possibility that the stress distribution varies between the portion where the tightening stress buffering hole is provided and the other portion. In addition, according to the magnet motor described in Patent Document 3, since the hole is formed in the vicinity of the central part in the circumferential direction and the radial direction of the yoke part, the flow of magnetic flux through the split iron core is obstructed by the hole part, and the motor There was a possibility that the efficiency of was reduced.

本発明は、前述した事情に鑑みてなされたものであり、その目的は、焼きばめや圧入によって分割鉄心に作用する応力を緩和することができ、電動機の効率を向上することができるステータを提供することにある。   The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a stator that can relieve stress acting on a split iron core by shrink fitting or press fitting, and can improve the efficiency of an electric motor. It is to provide.

上記目的を達成するために、請求項1に記載の発明は、ハウジング(例えば、実施の形態でのハウジング20)と、ハウジングに取り付けられる環状のステータホルダ(例えば、実施の形態でのステータホルダ30)と、ステータホルダに圧入固定され、円環状に配列される複数のステータ片(例えば、実施の形態でのステータ片41)を有する環状ステータ群(例えば、実施の形態での環状ステータ群40)と、を備え、ステータ片は、複数の電磁鋼板が積層された分割鉄心(例えば、実施の形態での分割鉄心50)と、分割鉄心を絶縁する絶縁部材(例えば、実施の形態での絶縁部材60)と、絶縁部材を介して分割鉄心の周囲に捲回されるステータコイル(例えば、実施の形態でのステータコイル42)と、を有するステータにおいて、分割鉄心は、第1鉄心(例えば、実施の形態でのベース鉄心51)と第2鉄心(例えば、実施の形態での別体鉄心52)からなり、第1鉄心は、そのヨーク部(例えば、実施の形態でのヨーク部53)に周方向に延びる嵌合穴(例えば、実施の形態での嵌合穴55)を有し、第2鉄心は、嵌合穴に所定の隙間(例えば、実施の形態での隙間C)を設けて嵌合されることを特徴とする。   To achieve the above object, the invention described in claim 1 includes a housing (for example, the housing 20 in the embodiment) and an annular stator holder (for example, the stator holder 30 in the embodiment) attached to the housing. And an annular stator group (for example, the annular stator group 40 in the embodiment) having a plurality of stator pieces (for example, the stator piece 41 in the embodiment) that are press-fitted and fixed to the stator holder and arranged in an annular shape. The stator piece includes a split core (for example, the split core 50 in the embodiment) in which a plurality of electromagnetic steel plates are stacked, and an insulating member (for example, an insulating member in the embodiment) that insulates the split core. 60) and a stator coil wound around the split iron core via an insulating member (for example, the stator coil 42 in the embodiment) The split iron core includes a first iron core (for example, the base iron core 51 in the embodiment) and a second iron core (for example, the separate iron core 52 in the embodiment), and the first iron core has a yoke portion (for example, The yoke portion 53 in the embodiment has a fitting hole extending in the circumferential direction (for example, the fitting hole 55 in the embodiment), and the second iron core has a predetermined gap (for example, implementation in the fitting hole). It is characterized by being fitted with a gap C) in the form of.

請求項2に記載の発明は、請求項1に記載の発明の構成に加えて、隙間は、第2鉄心の第1鉄心のティース部から離間する側に設けられることを特徴とする。   The invention described in claim 2 is characterized in that, in addition to the configuration of the invention described in claim 1, the gap is provided on the side of the second iron core that is separated from the tooth portion of the first iron core.

請求項3に記載の発明は、請求項1又は2に記載の発明の構成に加えて、隙間に、樹脂が注入されることを特徴とする。   The invention described in claim 3 is characterized in that, in addition to the configuration of the invention described in claim 1 or 2, a resin is injected into the gap.

請求項4に記載の発明は、請求項1〜3のいずれかに記載の発明の構成に加えて、隙間は、第2鉄心の外周部全体に亘って設けられ、第1鉄心及び第2鉄心の少なくとも一方に、隙間の周方向中央部と連通する樹脂注入部(例えば、実施の形態での樹脂注入溝57)が設けられることを特徴とする。   According to a fourth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the gap is provided over the entire outer periphery of the second iron core, and the first iron core and the second iron core. At least one of them is provided with a resin injection portion (for example, the resin injection groove 57 in the embodiment) communicating with the circumferential central portion of the gap.

請求項5に記載の発明は、請求項1〜4のいずれかに記載の発明の構成に加えて、第2鉄心の周方向両端部に、第2鉄心の周方向幅が径方向外側に向かって小さくなるように傾斜する傾斜部(例えば、実施の形態での傾斜部52b)が設けられることを特徴とする。   In addition to the configuration of the invention according to any one of claims 1 to 4, the invention according to claim 5 is such that the circumferential width of the second iron core is directed radially outward at both circumferential ends of the second iron core. An inclined portion (for example, the inclined portion 52b in the embodiment) that is inclined so as to become smaller is provided.

請求項1に記載のステータによれば、焼きばめや圧入によって分割鉄心に作用する応力を緩和することができる。これにより、分割鉄心のヨーク部の鉄損増加を抑制することができるので、電動機の効率を向上することができる。   According to the stator of the first aspect, the stress acting on the split iron core can be relaxed by shrink fitting or press fitting. Thereby, since the iron loss increase of the yoke part of a split iron core can be suppressed, the efficiency of an electric motor can be improved.

請求項2に記載のステータによれば、第2鉄心を嵌合穴の内周側面に密着させることができる。これにより、分割鉄心が第1鉄心及び第2鉄心の2部品で構成されているにも拘らず、分割鉄心を通る磁束の流れをスムースにすることができるので、電動機の効率低下を防止することができる。   According to the stator of the second aspect, the second iron core can be brought into close contact with the inner peripheral side surface of the fitting hole. Accordingly, the flow of magnetic flux passing through the split core can be made smooth even though the split core is composed of the first iron core and the second iron core, thereby preventing a reduction in the efficiency of the motor. Can do.

請求項3に記載のステータによれば、樹脂注入の圧力により第2鉄心を径方向内側に押圧することができ、第2鉄心を嵌合穴の内周側面に密着させることができる。これにより、分割鉄心が第1鉄心及び第2鉄心の2部品で構成されているにも拘らず、分割鉄心を通る磁束の流れをスムースにすることができるので、電動機の効率低下を防止することができる。   According to the stator of the third aspect, the second iron core can be pressed radially inward by the pressure of resin injection, and the second iron core can be brought into close contact with the inner peripheral side surface of the fitting hole. Accordingly, the flow of magnetic flux passing through the split core can be made smooth even though the split core is composed of the first iron core and the second iron core, thereby preventing a reduction in the efficiency of the motor. Can do.

請求項4に記載のステータによれば、第2鉄心の外周部全体に亘って設けられる隙間に樹脂を均等且つ容易に注入することができる。これにより、樹脂注入の圧力により第2鉄心を径方向内側に押圧することができ、第2鉄心を嵌合穴の内周側面に密着させることができる。このため、分割鉄心が第1鉄心及び第2鉄心の2部品で構成されているにも拘らず、分割鉄心を通る磁束の流れをスムースにすることができるので、電動機の効率低下を防止することができる。また、樹脂注入部を介して隙間に樹脂を容易に注入することができるので、電動機の生産効率を向上することができる。   According to the stator of the fourth aspect, the resin can be uniformly and easily injected into the gap provided over the entire outer peripheral portion of the second iron core. Thereby, a 2nd iron core can be pressed to radial inside by the pressure of resin injection | pouring, and a 2nd iron core can be stuck to the inner peripheral side surface of a fitting hole. For this reason, the flow of magnetic flux passing through the split iron core can be made smooth even though the split iron core is composed of two parts, the first iron core and the second iron core, thereby preventing a reduction in the efficiency of the motor. Can do. In addition, since the resin can be easily injected into the gap via the resin injection portion, the production efficiency of the electric motor can be improved.

請求項5に記載のステータによれば、第2鉄心の周方向両端部をステータの径方向と平行に形成した場合と比較して、隣り合う分割鉄心の第1鉄心と第2鉄心との間の隙間同士の離間距離を大きくすることができる。これにより、分割鉄心を通る磁束の流れを更にスムースにすることができるので、電動機の効率を更に向上することができる。   According to the stator of the fifth aspect, compared to the case where the circumferential end portions of the second iron core are formed in parallel to the radial direction of the stator, the distance between the first iron core and the second iron core of the adjacent divided iron cores. The separation distance between the gaps can be increased. Thereby, since the flow of the magnetic flux which passes along a division | segmentation iron core can be made smoother, the efficiency of an electric motor can further be improved.

本発明に係るステータの第1実施形態を説明するための正面図である。It is a front view for demonstrating 1st Embodiment of the stator which concerns on this invention. 図1に示すステータの分解斜視図である。It is a disassembled perspective view of the stator shown in FIG. 図1に示すステータの要部拡大正面図である。It is a principal part enlarged front view of the stator shown in FIG. 図3に示すステータ片の斜視図である。It is a perspective view of the stator piece shown in FIG. 図4に示すステータ片の分解斜視図である。It is a disassembled perspective view of the stator piece shown in FIG. 図5に示す分割鉄心の正面図である。It is a front view of the division | segmentation iron core shown in FIG. 図6に示す分割鉄心の要部拡大正面図である。It is a principal part enlarged front view of the split iron core shown in FIG. 分割鉄心の応力分布を示す図であり、(a)は第1実施形態の分割鉄心の応力分布を示す正面図、(b)は従来の分割鉄心の応力分布を示す正面図である。It is a figure which shows the stress distribution of a split iron core, (a) is a front view which shows the stress distribution of the split iron core of 1st Embodiment, (b) is a front view which shows the stress distribution of the conventional split iron core. 本発明に係るステータの第2実施形態を説明するためのステータ片の分解斜視図である。It is a disassembled perspective view of the stator piece for demonstrating 2nd Embodiment of the stator which concerns on this invention. 図9に示す分割鉄心の要部拡大正面図である。It is a principal part enlarged front view of the split iron core shown in FIG. 第2実施形態の分割鉄心の磁束の流れを説明するための要部拡大図である。It is a principal part enlarged view for demonstrating the flow of the magnetic flux of the split iron core of 2nd Embodiment. 第1実施形態の分割鉄心の磁束の流れを説明するための要部拡大図である。It is a principal part enlarged view for demonstrating the flow of the magnetic flux of the split iron core of 1st Embodiment.

以下、本発明に係るステータの各実施形態について、添付図面に基づいて詳細に説明する。なお、図面は符号の向きに見るものとする。   Hereinafter, each embodiment of the stator concerning the present invention is described in detail based on an accompanying drawing. The drawings are viewed in the direction of the reference numerals.

(第1実施形態)
まず、図1〜図8を参照して、本発明に係るステータの第1実施形態について説明する。
(First embodiment)
First, with reference to FIGS. 1-8, 1st Embodiment of the stator which concerns on this invention is described.

本実施形態のステータ10は、図1〜図3に示すように、ハウジング20と、ハウジング20に固定される環状のステータホルダ30と、ステータホルダ30に圧入・保持され、円環状に配列される複数のステータ片41を有する環状ステータ群40と、複数のステータ片41が接続される円環状の配電部材90と、を備える。   As shown in FIGS. 1 to 3, the stator 10 according to the present embodiment is arranged in an annular shape by housing 20, an annular stator holder 30 fixed to the housing 20, press-fitted and held in the stator holder 30. An annular stator group 40 having a plurality of stator pieces 41 and an annular power distribution member 90 to which the plurality of stator pieces 41 are connected are provided.

ハウジング20は、ステータホルダ30や環状ステータ群40が収納可能な形状に形成される内部空間21を備えており、内部空間21の内周部には、ステータホルダ30を固定するためのボルト孔22を有するボス(固定部)23が、周方向の所定位置に複数設けられる。また、ハウジング20は、内部空間21に連なるターミナルボックス24を備える。   The housing 20 includes an internal space 21 formed in a shape that can accommodate the stator holder 30 and the annular stator group 40, and a bolt hole 22 for fixing the stator holder 30 to the inner peripheral portion of the internal space 21. A plurality of bosses (fixed portions) 23 having the above are provided at predetermined positions in the circumferential direction. The housing 20 includes a terminal box 24 that is continuous with the internal space 21.

ステータホルダ30は、筒部31と、その軸線方向一端側に径方向外側に張り出すように設けられるフランジ部32と、を備える。筒部31の内径は、環状ステータ群40の外径よりも若干小さく設定されている。フランジ部32には、ハウジング20のボルト孔22に対応する位置に貫通孔33が形成される。そして、ステータホルダ30は、ハウジング20の内部空間21内に収容され、フランジ部32をボス23の端面に合わせて、貫通孔33に挿通されたボルト34をボルト孔22に螺合することによって、ハウジング20に固定される。   The stator holder 30 includes a cylindrical portion 31 and a flange portion 32 provided so as to project radially outward at one end in the axial direction thereof. The inner diameter of the cylindrical portion 31 is set slightly smaller than the outer diameter of the annular stator group 40. A through hole 33 is formed in the flange portion 32 at a position corresponding to the bolt hole 22 of the housing 20. Then, the stator holder 30 is accommodated in the internal space 21 of the housing 20, the flange portion 32 is aligned with the end surface of the boss 23, and the bolt 34 inserted through the through hole 33 is screwed into the bolt hole 22. It is fixed to the housing 20.

ステータ片41は、図4及び図5に示すように、複数の珪素鋼板(電磁鋼板)を積層してなる分割鉄心50と、分割鉄心50のティース部54を軸方向に挟み込むように嵌合される絶縁部材60と、絶縁部材60を介してティース部54の周囲に捲回されるステータコイル42と、を備える。   As shown in FIGS. 4 and 5, the stator piece 41 is fitted so as to sandwich a split iron core 50 formed by laminating a plurality of silicon steel plates (electromagnetic steel plates) and a tooth portion 54 of the split iron core 50 in the axial direction. And the stator coil 42 wound around the tooth portion 54 via the insulating member 60.

分割鉄心50は、図5及び図6に示すように、第1鉄心であるベース鉄心51と第2鉄心である別体鉄心52からなる。   As shown in FIGS. 5 and 6, the split iron core 50 includes a base iron core 51 that is a first iron core and a separate iron core 52 that is a second iron core.

ベース鉄心51は、プレス加工などによって略T字型に形成される複数の珪素鋼板51aが積層されて構成され、円周方向に形成されるヨーク部53と、ヨーク部53の内周面の略中央から径方向内側に向かって形成されるティース部54と、を有する。そして、ヨーク部53には、長手方向が周方向に延びる略長方形の嵌合穴55が形成される。また、ティース部54の内周端の周方向両側には、周方向に突出する抜止め部56がそれぞれ形成される。   The base iron core 51 is formed by laminating a plurality of silicon steel plates 51a formed in a substantially T shape by press working or the like, and a yoke portion 53 formed in the circumferential direction, and an approximately inner surface of the yoke portion 53. And a tooth portion 54 formed radially inward from the center. The yoke portion 53 is formed with a substantially rectangular fitting hole 55 whose longitudinal direction extends in the circumferential direction. In addition, on both sides in the circumferential direction of the inner peripheral end of the tooth portion 54, a retaining portion 56 that protrudes in the circumferential direction is formed.

また、ベース鉄心51のヨーク部53の円周方向の一端(図6の右端)には、略半円形状の凸部53aが形成され、他端(図6の左端)には、隣り合うベース鉄心51の凸部53aを嵌合させる略半円形状の凹部53bが形成されており、隣り合うベース鉄心51の凸部53aと凹部53bを互いに嵌合させることによって複数の分割鉄心50(ステータ片41)が円環状に配列される。   Further, a substantially semicircular convex portion 53a is formed at one end (right end in FIG. 6) of the yoke portion 53 of the base iron core 51, and an adjacent base is formed at the other end (left end in FIG. 6). A substantially semicircular concave portion 53b is formed to which the convex portion 53a of the iron core 51 is fitted, and a plurality of divided iron cores 50 (stator pieces) are formed by fitting the convex portion 53a and the concave portion 53b of the adjacent base iron core 51 to each other. 41) are arranged in an annular shape.

別体鉄心52は、プレス加工などによってベース鉄心51の嵌合穴55と同じ略長方形に形成される複数の珪素鋼板52aが積層されて構成され、嵌合穴55に軸方向に沿って嵌合される。そして、別体鉄心52の径方向幅は、嵌合穴55の径方向幅より僅かに小さく設定されており、別体鉄心52を嵌合穴55に嵌合したとき、図7に示すように、別体鉄心52のティース部54から離間する側に所定の隙間Cが形成される。また、この隙間Cは、別体鉄心52の外周部全体に亘って設けられる。また、隙間Cの幅は、分割鉄心50の圧入によってベース鉄心51のヨーク部53が弾性変形しても、所定のクリアランスを確保できる大きさであればよく、例えば、0.01〜0.1mm程度に設定される。   The separate core 52 is formed by laminating a plurality of silicon steel plates 52a formed in the same substantially rectangular shape as the fitting hole 55 of the base iron core 51 by pressing or the like, and is fitted in the fitting hole 55 along the axial direction. Is done. The radial width of the separate iron core 52 is set slightly smaller than the radial width of the fitting hole 55. When the separate iron core 52 is fitted into the fitting hole 55, as shown in FIG. A predetermined gap C is formed on the side of the separate core 52 away from the tooth portion 54. The gap C is provided over the entire outer peripheral portion of the separate iron core 52. Further, the width of the gap C may be a size that can ensure a predetermined clearance even when the yoke portion 53 of the base iron core 51 is elastically deformed by press-fitting of the divided iron core 50, for example, 0.01 to 0.1 mm. Set to degree.

また、本実施形態では、図6及び図7に示すように、ベース鉄心51のヨーク部53に、隙間Cの周方向中央部と連通し、隙間Cに樹脂を注入するための略半円形の樹脂注入溝(樹脂注入部)57が形成される。なお、樹脂注入溝57が形成される位置、即ち、ヨーク部53の周方向中央部且つ外周面近傍は、分割鉄心50を通る磁束の流れを最も妨げない部分である。   Further, in this embodiment, as shown in FIGS. 6 and 7, the yoke portion 53 of the base iron core 51 communicates with the central portion in the circumferential direction of the gap C, and is a substantially semicircular shape for injecting resin into the gap C. A resin injection groove (resin injection portion) 57 is formed. Note that the position where the resin injection groove 57 is formed, that is, the central portion in the circumferential direction of the yoke portion 53 and the vicinity of the outer peripheral surface is the portion that most hardly impedes the flow of magnetic flux through the split core 50.

そして、本実施形態では、ベース鉄心51の嵌合穴55に別体鉄心52を嵌合し、樹脂注入溝57から嵌合穴55の外周側面と別体鉄心52との間に樹脂を注入することにより、別体鉄心52のティース部54から離間する側に隙間Cが形成されると共に、別体鉄心52が嵌合穴55の内周側面に密着する。そして、別体鉄心52のティース部54から離間する側に隙間Cが形成されることにより、ヨーク部53に作用する応力が緩和される。また、別体鉄心52が嵌合穴55の内周側面に密着することにより、分割鉄心50を通る磁束の流れが妨げられることはなく、磁束がスムースに流れる。また、隙間Cは、その幅が0.01〜0.1mm程度に設定されるため、プレス加工では形成することが困難であるが、ベース鉄心51の嵌合穴55に別体鉄心52を嵌合することにより設定することが可能となる。   In this embodiment, the separate iron core 52 is fitted into the fitting hole 55 of the base iron core 51, and the resin is injected from the resin injection groove 57 between the outer peripheral side surface of the fitting hole 55 and the separate iron core 52. As a result, a gap C is formed on the side of the separate core 52 away from the tooth portion 54, and the separate core 52 is in close contact with the inner peripheral side surface of the fitting hole 55. And the stress which acts on the yoke part 53 is relieve | moderated by forming the clearance gap C in the side spaced apart from the teeth part 54 of the separate iron core 52. FIG. Further, when the separate iron core 52 is in close contact with the inner peripheral side surface of the fitting hole 55, the flow of magnetic flux through the split iron core 50 is not hindered, and the magnetic flux flows smoothly. Further, since the gap C is set to about 0.01 to 0.1 mm in width, it is difficult to form it by press working, but the separate core 52 is fitted into the fitting hole 55 of the base core 51. It becomes possible to set by combining.

また、本実施形態では、分割鉄心50を磁束がスムースに流れるように、ベース鉄心51と別体鉄心52とで圧延方向の違う珪素鋼板が使用される。具体的には、ベース鉄心51の珪素鋼板51aには、圧延方向が分割鉄心50の径方向(図6中の矢印A方向)に平行な珪素鋼板が使用され、別体鉄心52の珪素鋼板52aには、圧延方向が分割鉄心50のヨーク部53の長手方向(図6中の矢印B方向)に平行な珪素鋼板が使用される。これにより、分割鉄心50を通る磁束の流れがスムースになるので、電動機の効率を向上することが可能となる。   In the present embodiment, silicon steel plates having different rolling directions are used for the base iron core 51 and the separate iron core 52 so that the magnetic flux flows smoothly through the divided iron core 50. Specifically, for the silicon steel plate 51a of the base iron core 51, a silicon steel plate whose rolling direction is parallel to the radial direction of the split iron core 50 (the direction of arrow A in FIG. 6) is used. For this, a silicon steel plate whose rolling direction is parallel to the longitudinal direction of the yoke portion 53 of the split core 50 (the direction of arrow B in FIG. 6) is used. Thereby, since the flow of the magnetic flux which passes along the split iron core 50 becomes smooth, it becomes possible to improve the efficiency of an electric motor.

絶縁部材60は、電気的絶縁性を有する合成樹脂によって成形されており、図4及び図5に示すように、軸方向に分割される第1絶縁部材61と第2絶縁部材62から構成されており、これら第1絶縁部材61と第2絶縁部材62とを分割鉄心50のティース部54を軸方向に挟み込むように組み合わせることにより、第1絶縁部材61と第2絶縁部材62との間に分割鉄心50が配置される。また、絶縁部材60は、第1絶縁部材61と第2絶縁部材62とを軸方向に組み合わせることにより、径方向両端部に鍔部63を有するボビン形状となる。   The insulating member 60 is formed of a synthetic resin having electrical insulation, and includes a first insulating member 61 and a second insulating member 62 that are divided in the axial direction as shown in FIGS. 4 and 5. The first insulating member 61 and the second insulating member 62 are combined between the first insulating member 61 and the second insulating member 62 by combining the tooth portions 54 of the split core 50 so as to be sandwiched in the axial direction. An iron core 50 is disposed. Further, the insulating member 60 has a bobbin shape having flanges 63 at both ends in the radial direction by combining the first insulating member 61 and the second insulating member 62 in the axial direction.

第1絶縁部材61は、図4及び図5に示すように、軸方向一端側からティース部54の略半分を覆う断面略コの字状の第1縦壁部64と、第1縦壁部64の径方向両端部にそれぞれ形成され、鍔部63の一部を構成する第1外周側鍔部63a及び第1内周側鍔部63bと、第1縦壁部64から径方向外側に延出してヨーク部53の一方の側面を覆う壁部65と、第1縦壁部64から径方向内側に延出する中点連結用壁部66と、を備える。   As shown in FIGS. 4 and 5, the first insulating member 61 includes a first vertical wall portion 64 having a substantially U-shaped cross section that covers substantially half of the tooth portion 54 from one axial end side, and a first vertical wall portion. 64, which are formed at both ends in the radial direction, respectively, extend from the first vertical wall 64 to the first outer peripheral side flange 63a and the first inner peripheral side flange 63b constituting a part of the flange 63. And a wall portion 65 that covers one side surface of the yoke portion 53 and a midpoint connecting wall portion 66 that extends radially inward from the first vertical wall portion 64.

壁部65には、その外周縁から軸方向外側に延出される2つの天板部67が形成されており、この天板部67、壁部65、及び第1外周側鍔部63aによって第1絶縁部材61の外周側にバスタブ形状の配電部68が設けられる。この配電部68には、U相、V相、W相の3本のバスリング(給電線)91U,91V,91Wからなる配電部材90が収納される。   The wall portion 65 is formed with two top plate portions 67 extending outward in the axial direction from the outer peripheral edge thereof. The top plate portion 67, the wall portion 65, and the first outer peripheral side flange portion 63a are used as the first top plate portion 67. A bathtub-shaped power distribution unit 68 is provided on the outer peripheral side of the insulating member 61. The power distribution unit 68 accommodates a power distribution member 90 composed of three bus rings (feed lines) 91U, 91V, and 91W of U phase, V phase, and W phase.

配電部材90は、同一径のリング状に形成されるバスリング91U,91V,91Wが軸方向にずらされて同心上に配置されており、この3本のバスリング91U,91V,91Wは、樹脂モールド部(結束部材)92によって束ねられている。そして、バスリング91U,91V,91Wには、それぞれに対応するステータ片41のステータコイル42の一端42aが接続される(図3参照)。   In the power distribution member 90, bus rings 91U, 91V, 91W formed in a ring shape having the same diameter are arranged concentrically while being shifted in the axial direction. The three bus rings 91U, 91V, 91W are made of resin. It is bundled by a mold part (bundling member) 92. And the one end 42a of the stator coil 42 of the stator piece 41 corresponding to each is connected to bus ring 91U, 91V, 91W (refer FIG. 3).

また、図1に示すように、バスリング91U,91V,91Wからは、接続端子93U,93V,93Wが径方向外側に延出されており、この接続端子93U,93V,93Wは、ターミナルボックス24内に配設されるバスバー94U,94V,94Wを介して、給電端子95U,95V,95Wに接続される。   As shown in FIG. 1, connection terminals 93U, 93V, and 93W extend radially outward from the bus rings 91U, 91V, and 91W, and the connection terminals 93U, 93V, and 93W are connected to the terminal box 24. It is connected to power supply terminals 95U, 95V, and 95W via bus bars 94U, 94V, and 94W disposed therein.

また、壁部65には、ティース部54の周方向幅より僅かに大きな幅を有する略矩形状の樹脂注入口69が形成されており、この樹脂注入口69は、第1絶縁部材61と分割鉄心50が組み合わされたとき、分割鉄心50の樹脂注入溝57の一端側と連通する。   Further, a substantially rectangular resin injection port 69 having a width slightly larger than the circumferential width of the tooth portion 54 is formed in the wall portion 65, and the resin injection port 69 is divided from the first insulating member 61. When the iron core 50 is combined, it communicates with one end side of the resin injection groove 57 of the divided iron core 50.

中点連結用壁部66には、その内周縁から軸方向外側に延出される仕切板部70が形成されており、この仕切板部70、中点連結用壁部66、及び第1内周側鍔部63bによって第1絶縁部材61の内周側にバスタブ形状の配電部71が設けられる。この配電部71には、中点ターミナル72が収納されており、隣り合うステータコイル42の他端42b同士が接続される(図3参照)。これにより、全てのステータコイル42が中点ターミナル72を介して円環状に接続される。   The midpoint connecting wall portion 66 is formed with a partition plate portion 70 extending outward in the axial direction from the inner peripheral edge thereof. The partition plate portion 70, the midpoint connecting wall portion 66, and the first inner periphery A bathtub-shaped power distribution unit 71 is provided on the inner peripheral side of the first insulating member 61 by the side flange 63b. The power distribution unit 71 houses a midpoint terminal 72, and the other ends 42b of the adjacent stator coils 42 are connected to each other (see FIG. 3). Thereby, all the stator coils 42 are connected in an annular shape via the midpoint terminal 72.

第2絶縁部材62は、図5に示すように、軸方向他端側からティース部54の略半分を覆う断面略コの字状の第2縦壁部81と、第2縦壁部81の径方向両端部にそれぞれ形成され、鍔部63の一部を構成する第2外周側鍔部63c及び第2内周側鍔部63dと、第2縦壁部81から径方向外側に延出してヨーク部53の他方の側面を覆い、分割鉄心50の樹脂注入溝57の他端側を塞ぐ樹脂漏れ防止壁82と、を備える。   As shown in FIG. 5, the second insulating member 62 includes a second vertical wall portion 81 having a substantially U-shaped cross section that covers substantially half of the tooth portion 54 from the other axial end side, and a second vertical wall portion 81. Extending radially outward from the second outer peripheral side flange 63c and the second inner peripheral side flange 63d, which are formed at both ends in the radial direction, and constitute a part of the flange 63, and the second vertical wall 81. And a resin leakage prevention wall 82 that covers the other side surface of the yoke portion 53 and closes the other end of the resin injection groove 57 of the split iron core 50.

また、本実施形態では、図4及び図5に示すように、第1絶縁部材61の第1外周側鍔部63aの径方向外側、第1縦壁部64の周方向内側、及び第1内周側鍔部63bの径方向内側の軸方向開放端に、段状の第1嵌合部85が連続して形成され、また、第2絶縁部材62の第2外周側鍔部63cの径方向内側、第2縦壁部81の周方向外側、及び第2内周側鍔部63dの径方向外側の軸方向開放端に、段状の第2嵌合部86が連続して形成される。そして、第1嵌合部85及び第2嵌合部86を軸方向に嵌合させることにより、第1絶縁部材61と第2絶縁部材62とが組み合わされ、一体的な絶縁部材60となる。   In the present embodiment, as shown in FIGS. 4 and 5, the first outer peripheral side flange 63a of the first insulating member 61 is radially outer, the first vertical wall 64 is circumferentially inner, and the first inner A step-like first fitting portion 85 is continuously formed at the axially open end on the radially inner side of the circumferential side flange 63b, and the radial direction of the second outer circumferential side flange 63c of the second insulating member 62. A step-like second fitting portion 86 is continuously formed on the inner side, the outer side in the circumferential direction of the second vertical wall portion 81, and the axially open end on the outer side in the radial direction of the second inner peripheral side flange portion 63 d. Then, by fitting the first fitting portion 85 and the second fitting portion 86 in the axial direction, the first insulating member 61 and the second insulating member 62 are combined to form an integral insulating member 60.

このように構成されたステータ10では、配電部材90の絶縁を行うべく配電部68に不図示のノズルから樹脂を注入すると、配電部68の絶縁処理と同時に、注入された樹脂が、樹脂注入口69及び樹脂注入溝57を介して嵌合穴55の外周側面と別体鉄心52との間に注入されて、別体鉄心52の外周部全体に亘って、嵌合穴55の外周側面との間に隙間Cが形成される。そして、本実施形態の分割鉄心50では、図8に示すように、隙間Cが形成されない従来の分割鉄心100と比較して、ヨーク部53に作用する応力が緩和されていることがわかった。   In the stator 10 configured as described above, when resin is injected into the power distribution unit 68 from a nozzle (not shown) to insulate the power distribution member 90, the injected resin is simultaneously injected into the resin injection port at the same time as the insulation process of the power distribution unit 68. 69 and the resin injection groove 57 between the outer peripheral side surface of the fitting hole 55 and the separate iron core 52, and the entire outer peripheral portion of the separate iron core 52 with the outer peripheral side surface of the fitting hole 55. A gap C is formed between them. And in the split iron core 50 of this embodiment, as shown in FIG. 8, it turned out that the stress which acts on the yoke part 53 is relieved compared with the conventional split iron core 100 in which the clearance gap C is not formed.

また、このとき、注入された樹脂の圧力により別体鉄心52がティース部54側に押圧されるので、別体鉄心52が嵌合穴55の内周側面に密着する。これにより、分割鉄心50を通る磁束の流れが別体鉄心52と嵌合穴55との接合部分で妨げられることがないので、分割鉄心50がベース鉄心51及び別体鉄心52の2部品で構成されているにも拘らず、磁束がスムースに流れる。   At this time, the separate core 52 is pressed toward the tooth portion 54 by the pressure of the injected resin, so that the separate core 52 is in close contact with the inner peripheral side surface of the fitting hole 55. As a result, the flow of magnetic flux passing through the split core 50 is not hindered at the joint between the separate core 52 and the fitting hole 55, so the split core 50 is composed of two parts, the base core 51 and the separate core 52. Despite being done, the magnetic flux flows smoothly.

また、樹脂注入溝57の他端部が樹脂漏れ防止壁82により塞がれているので、注入された樹脂が樹脂注入溝57の他端部から外部に漏れ出ることはない。   Further, since the other end portion of the resin injection groove 57 is closed by the resin leakage prevention wall 82, the injected resin does not leak out from the other end portion of the resin injection groove 57.

以上説明したように、本実施形態のステータ10によれば、分割鉄心50は、ベース鉄心51と別体鉄心52からなり、ベース鉄心51は、そのヨーク部53に周方向に延びる嵌合穴55を有し、別体鉄心52は、嵌合穴55に所定の隙間Cを設けて嵌合されるため、焼きばめや圧入によって分割鉄心50(ヨーク部53)に作用する応力を緩和することができる。これにより、分割鉄心50のヨーク部53の鉄損増加を抑制することができるので、電動機の効率を向上することができる。   As described above, according to the stator 10 of the present embodiment, the split iron core 50 includes the base iron core 51 and the separate iron core 52, and the base iron core 51 is fitted into the yoke portion 53 in the circumferential direction. Since the separate core 52 is fitted in the fitting hole 55 with a predetermined gap C, the stress acting on the split core 50 (yoke portion 53) can be reduced by shrink fitting or press fitting. Can do. Thereby, since the iron loss increase of the yoke part 53 of the division | segmentation iron core 50 can be suppressed, the efficiency of an electric motor can be improved.

また、本実施形態のステータ10によれば、隙間Cが別体鉄心52のティース部54から離間する側に設けられるため、別体鉄心52を嵌合穴55の内周側面に密着させることができる。これにより、分割鉄心50がベース鉄心51及び別体鉄心52の2部品で構成されているにも拘らず、分割鉄心50を通る磁束の流れをスムースにすることができるので、電動機の効率低下を防止することができる。   Further, according to the stator 10 of the present embodiment, since the gap C is provided on the side away from the tooth portion 54 of the separate iron core 52, the separate iron core 52 can be brought into close contact with the inner peripheral side surface of the fitting hole 55. it can. Thereby, although the split core 50 is composed of two parts, the base core 51 and the separate core 52, the flow of magnetic flux through the split core 50 can be made smooth, so that the efficiency of the motor is reduced. Can be prevented.

また、本実施形態のステータ10によれば、隙間Cに樹脂が注入されるため、樹脂注入の圧力により別体鉄心52を径方向内側に押圧することができ、別体鉄心52を嵌合穴55の内周側面に密着させることができる。これにより、分割鉄心50がベース鉄心51及び別体鉄心52の2部品で構成されているにも拘らず、分割鉄心50を通る磁束の流れをスムースにすることができるので、電動機の効率低下を防止することができる。   Further, according to the stator 10 of the present embodiment, since the resin is injected into the gap C, the separate core 52 can be pressed radially inward by the pressure of the resin injection, and the separate core 52 is fitted into the fitting hole. 55 can be brought into close contact with the inner peripheral side surface. Thereby, although the split core 50 is composed of two parts, the base core 51 and the separate core 52, the flow of magnetic flux through the split core 50 can be made smooth, so that the efficiency of the motor is reduced. Can be prevented.

また、本実施形態のステータ10によれば、隙間Cは、別体鉄心52の外周部全体に亘って設けられ、ベース鉄心51に、隙間Cの周方向中央部と連通する樹脂注入溝57が設けられるため、別体鉄心52の外周部全体に亘って設けられる隙間Cに樹脂を均等且つ容易に注入することができる。これにより、樹脂注入の圧力により別体鉄心52を径方向内側に押圧することができ、別体鉄心52を嵌合穴55の内周側面に密着させることができる。このため、分割鉄心50がベース鉄心51及び別体鉄心52の2部品で構成されているにも拘らず、分割鉄心50を通る磁束の流れをスムースにすることができるので、電動機の効率低下を防止することができる。また、樹脂注入溝57を介して隙間Cに樹脂を容易に注入することができるので、電動機の生産効率を向上することができる。   Further, according to the stator 10 of the present embodiment, the gap C is provided over the entire outer peripheral portion of the separate iron core 52, and the resin injection groove 57 that communicates with the central portion in the circumferential direction of the gap C is formed in the base iron core 51. Since it is provided, the resin can be uniformly and easily injected into the gap C provided over the entire outer peripheral portion of the separate core 52. Thereby, the separate core 52 can be pressed radially inward by the pressure of resin injection, and the separate core 52 can be brought into close contact with the inner peripheral side surface of the fitting hole 55. For this reason, although the split core 50 is composed of two parts, the base core 51 and the separate core 52, the flow of magnetic flux through the split core 50 can be made smooth, so that the efficiency of the motor is reduced. Can be prevented. In addition, since the resin can be easily injected into the gap C through the resin injection groove 57, the production efficiency of the electric motor can be improved.

また、本実施形態のステータ10によれば、ベース鉄心51の珪素鋼板51aに、圧延方向が分割鉄心50の径方向に平行な珪素鋼板が使用され、別体鉄心52の珪素鋼板52aに、圧延方向が分割鉄心50のヨーク部53の長手方向に平行な珪素鋼板が使用されるため、分割鉄心50を通る磁束の流れをスムースにすることができ、電動機の効率を向上することができる。   Further, according to the stator 10 of the present embodiment, a silicon steel plate whose rolling direction is parallel to the radial direction of the split core 50 is used for the silicon steel plate 51 a of the base iron core 51, and the silicon steel plate 52 a of the separate core 52 is rolled. Since a silicon steel plate whose direction is parallel to the longitudinal direction of the yoke portion 53 of the split core 50 is used, the flow of magnetic flux passing through the split core 50 can be made smooth, and the efficiency of the electric motor can be improved.

(第2実施形態)
次に、図9〜図12を参照して、本発明に係るステータの第2実施形態について説明する。なお、第1実施形態と同一又は同等部分については、図面に同一符号を付してその説明を省略或いは簡略化する。
(Second Embodiment)
Next, a second embodiment of the stator according to the present invention will be described with reference to FIGS. Note that portions that are the same as or equivalent to those of the first embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted or simplified.

本実施形態では、図9及び図10に示すように、別体鉄心52の周方向両端部に、別体鉄心52の周方向幅が径方向外側に向かって小さくなるように傾斜する傾斜部52bが形成され、別体鉄心52が略台形状に形成されている。   In the present embodiment, as shown in FIGS. 9 and 10, the inclined portions 52 b are inclined at both circumferential ends of the separate core 52 so that the circumferential width of the separate core 52 decreases radially outward. The separate iron core 52 is formed in a substantially trapezoidal shape.

また、本実施形態では、ベース鉄心51の嵌合穴55の周方向両端部に、別体鉄心52の傾斜部52bと同じ角度で平行に傾斜する傾斜部55aが形成され、別体鉄心52の形状に合わせて、嵌合穴55も略台形状に形成されている。そして、別体鉄心52の径方向幅は、嵌合穴55の径方向幅より僅かに小さく設定されており、別体鉄心52を嵌合穴55に嵌合したとき、図10に示すように、別体鉄心52のティース部54から離間する側に所定の隙間Cが形成される。   In the present embodiment, inclined end portions 55 a that are inclined in parallel at the same angle as the inclined portion 52 b of the separate core 52 are formed at both ends in the circumferential direction of the fitting holes 55 of the base core 51. The fitting hole 55 is also formed in a substantially trapezoidal shape according to the shape. The radial width of the separate iron core 52 is set slightly smaller than the radial width of the fitting hole 55. When the separate iron core 52 is fitted into the fitting hole 55, as shown in FIG. A predetermined gap C is formed on the side of the separate core 52 away from the tooth portion 54.

このように構成されたステータ10では、図11に示すように、隣り合う分割鉄心50の別体鉄心52及び嵌合穴55の傾斜部52b,55a間の隙間C1同士の離間距離が、図12に示す第1実施形態の隣り合う分割鉄心50の別体鉄心52の周方向端部と嵌合穴55との間の隙間C2(図7参照)同士の離間距離と比較して大きくなる。このため、本実施形態の磁束の流れが低下する範囲R1が第1実施形態の磁束の流れが低下する範囲R2より少なくなるので、分割鉄心50を通る磁束の流れが更にスムースになり、電動機の効率を更に向上することが可能となる。なお、図中に示す一点鎖線は、磁束の流れを表している。   In the stator 10 configured as described above, as shown in FIG. 11, the separation distance between the gaps C1 between the separate cores 52 of the adjacent split cores 50 and the inclined portions 52b and 55a of the fitting holes 55 is as shown in FIG. It becomes large compared with the separation distance of the clearance gap C2 (refer FIG. 7) between the circumferential direction edge part and the fitting hole 55 of the separate core 52 of the adjacent split iron core 50 of 1st Embodiment shown in FIG. For this reason, since the range R1 in which the flow of magnetic flux in the present embodiment is reduced is smaller than the range R2 in which the flow of magnetic flux is reduced in the first embodiment, the flow of magnetic flux through the split iron core 50 is further smoothed. Efficiency can be further improved. In addition, the dashed-dotted line shown in the figure represents the flow of magnetic flux.

以上説明したように、本実施形態のステータ10によれば、別体鉄心52の周方向両端部に、別体鉄心52の周方向幅が径方向外側に向かって小さくなるように傾斜する傾斜部52bが設けられるため、別体鉄心52の周方向両端部をステータ10の径方向と平行に形成した場合と比較して、隣り合う分割鉄心50の別体鉄心52及び嵌合穴55の傾斜部52b,55a間の隙間C1同士の離間距離を大きくすることができる。これにより、分割鉄心50を通る磁束の流れを更にスムースにすることができるので、電動機の効率を更に向上することができる。
その他の構成及び作用効果については、上記第1実施形態と同様である。
As described above, according to the stator 10 of the present embodiment, the inclined portions that are inclined so that the circumferential width of the separate core 52 decreases toward the radially outer side at both circumferential ends of the separate core 52. 52b is provided, and compared with the case where both circumferential ends of the separate core 52 are formed in parallel with the radial direction of the stator 10, the separate core 52 of the adjacent split core 50 and the inclined portion of the fitting hole 55 are provided. The separation distance between the gaps C1 between 52b and 55a can be increased. Thereby, since the flow of the magnetic flux which passes along the division | segmentation iron core 50 can be made smoother, the efficiency of an electric motor can further be improved.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

なお、本発明は、上記各実施形態に例示したものに限定されるものではなく、本発明の要旨を逸脱しない範囲において適宜変更可能である。
例えば、上記各実施形態においては、分割鉄心50には樹脂注入溝57が1つ形成されているが、これに限定されず、樹脂注入溝57は2つ以上形成されていてもよい。
In addition, this invention is not limited to what was illustrated by said each embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.
For example, in each of the embodiments described above, one resin injection groove 57 is formed in the split iron core 50, but the present invention is not limited to this, and two or more resin injection grooves 57 may be formed.

10 ステータ
20 ハウジング
30 ステータホルダ
40 環状ステータ群
41 ステータ片
42 ステータコイル
50 分割鉄心
51 ベース鉄心(第1鉄心)
51a 珪素鋼板(電磁鋼板)
52 別体鉄心(第2鉄心)
52a 珪素鋼板(電磁鋼板)
52b 傾斜部
53 ヨーク部
54 ティース部
55 嵌合穴
55a 傾斜部
57 樹脂注入溝(樹脂注入部)
60 絶縁部材
90 配電部材
C 隙間
DESCRIPTION OF SYMBOLS 10 Stator 20 Housing 30 Stator holder 40 Annular stator group 41 Stator piece 42 Stator coil 50 Split iron core 51 Base iron core (1st iron core)
51a Silicon steel sheet (electromagnetic steel sheet)
52 Separate iron core (second iron core)
52a Silicon steel sheet (electromagnetic steel sheet)
52b inclined portion 53 yoke portion 54 teeth portion 55 fitting hole 55a inclined portion 57 resin injection groove (resin injection portion)
60 Insulation member 90 Power distribution member C Clearance

Claims (5)

ハウジングと、前記ハウジングに取り付けられる環状のステータホルダと、前記ステータホルダに圧入固定され、円環状に配列される複数のステータ片を有する環状ステータ群と、を備え、
前記ステータ片は、複数の電磁鋼板が積層された分割鉄心と、前記分割鉄心を絶縁する絶縁部材と、前記絶縁部材を介して前記分割鉄心の周囲に捲回されるステータコイルと、を有するステータにおいて、
前記分割鉄心は、第1鉄心と第2鉄心からなり、
前記第1鉄心は、そのヨーク部に周方向に延びる嵌合穴を有し、
前記第2鉄心は、前記嵌合穴に所定の隙間を設けて嵌合されることを特徴とするステータ。
A housing, an annular stator holder attached to the housing, and an annular stator group having a plurality of stator pieces press-fitted and fixed to the stator holder and arranged in an annular shape,
The stator piece includes a split iron core in which a plurality of electromagnetic steel plates are laminated, an insulating member that insulates the split iron core, and a stator coil that is wound around the split iron core via the insulating member. In
The split iron core consists of a first iron core and a second iron core,
The first iron core has a fitting hole extending in a circumferential direction in the yoke portion;
The second iron core is fitted with a predetermined gap in the fitting hole.
前記隙間は、前記第2鉄心の前記第1鉄心のティース部から離間する側に設けられることを特徴とする請求項1に記載のステータ。   2. The stator according to claim 1, wherein the gap is provided on a side of the second iron core that is separated from a tooth portion of the first iron core. 前記隙間に、樹脂が注入されることを特徴とする請求項1又は2に記載のステータ。   The stator according to claim 1, wherein a resin is injected into the gap. 前記隙間は、前記第2鉄心の外周部全体に亘って設けられ、
前記第1鉄心及び前記第2鉄心の少なくとも一方に、前記隙間の周方向中央部と連通する樹脂注入部が設けられることを特徴とする請求項1〜3のいずれかに記載のステータ。
The gap is provided over the entire outer periphery of the second iron core,
The stator according to claim 1, wherein at least one of the first iron core and the second iron core is provided with a resin injection portion that communicates with a circumferential central portion of the gap.
前記第2鉄心の周方向両端部に、前記第2鉄心の周方向幅が径方向外側に向かって小さくなるように傾斜する傾斜部が設けられることを特徴とする請求項1〜4のいずれかに記載のステータ。   The inclined part which inclines so that the circumferential direction width | variety of the said 2nd core may become small toward a radial direction outer side may be provided in the circumferential direction both ends of the said 2nd core. The stator described in 1.
JP2009052170A 2009-03-05 2009-03-05 Stator Expired - Fee Related JP5293280B2 (en)

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