JP6114115B2 - Embedded magnet rotor - Google Patents

Embedded magnet rotor Download PDF

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JP6114115B2
JP6114115B2 JP2013114630A JP2013114630A JP6114115B2 JP 6114115 B2 JP6114115 B2 JP 6114115B2 JP 2013114630 A JP2013114630 A JP 2013114630A JP 2013114630 A JP2013114630 A JP 2013114630A JP 6114115 B2 JP6114115 B2 JP 6114115B2
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magnet
slot
embedded
silicon steel
protrusion
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JP2014236526A (en
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昭文 長澤
昭文 長澤
文寿 渡邉
文寿 渡邉
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Description

本発明は、工作機械等に用いられる電動機の磁石埋込型回転子に関する。   The present invention relates to a magnet-embedded rotor for an electric motor used in a machine tool or the like.

従来、周方向両側に樹脂埋込部を有する複数のスロットを外周に沿って等間隔に配置した円形の鋼板を、多数積層して円柱状に形成し、厚さ及び幅が前記スロットの径方向の幅及び周方向の幅より小さい板状の磁石を前記スロットに埋込み、前記樹脂埋込部に樹脂を充填して前記スロット内に前記磁石を固定した磁石埋込型回転子において、前記樹脂埋込部の径方向内側の辺から前記樹脂埋込部内に突出し前記磁石を係止する突起を前記鋼板に設けた磁石埋込型回転子が開示されている（例えば、特許文献１参照）。   Conventionally, a plurality of circular steel plates each having a plurality of slots having resin embedding portions on both sides in the circumferential direction are arranged at equal intervals along the outer periphery to form a cylindrical shape, and the thickness and width are the radial directions of the slots. In a magnet-embedded rotor in which a plate-like magnet smaller than the width in the circumferential direction and the circumferential width is embedded in the slot, the resin embedded portion is filled with resin, and the magnet is fixed in the slot. There is disclosed a magnet-embedded rotor in which a protrusion that protrudes into the resin-embedded portion from the radially inner side of the insert portion and locks the magnet is provided on the steel plate (see, for example, Patent Document 1).

特開２０１０−６３２７７号公報JP 2010-63277 A

しかしながら、上記特許文献１に記載された樹脂埋込部内に突出する突起は、樹脂埋込部の軸方向（積層鋼板の積上げ方向）の全長に亘って設けられている。   However, the protrusion which protrudes in the resin embedding part described in the said patent document 1 is provided over the full length of the axial direction (stacking direction of a laminated steel plate) of the resin embedding part.

樹脂埋込部への樹脂の充填性は、充填時の圧力損失の大きさできまり、〔圧力損失∝ 流路長／流路面積〕で表されるので、高い充填性（流動性）を確保するには、流路面積の広い部分を長く、狭い部分を短くすることが必要である。特許文献１に記載された樹脂埋込部の構造では、樹脂を充填させて磁石を固定するとき、樹脂埋込部の軸方向の全長に亘って突起が設けられていて、突起の面積分、流路面積が狭くなるため、十分な樹脂の充填性を確保することができない、という問題がある。特に、流路長が長いほど、著しく充填性が悪くなる。   The resin fillability in the resin embedding part is determined by the pressure loss at the time of filling, and is expressed as [pressure loss 流 路 flow path length / flow path area], ensuring high fillability (flowability) In order to achieve this, it is necessary to lengthen the wide portion of the flow path area and shorten the narrow portion. In the structure of the resin embedding portion described in Patent Document 1, when the magnet is fixed by filling the resin, a protrusion is provided over the entire length in the axial direction of the resin embedding portion. Since the flow path area becomes narrow, there is a problem that sufficient resin filling property cannot be ensured. In particular, the longer the flow path length, the worse the filling property.

本発明は、上記に鑑みてなされたものであって、スロットの樹脂埋込部への樹脂の充填性のよい磁石埋込型回転子を得ることを目的とする。   The present invention has been made in view of the above, and an object of the present invention is to obtain a magnet-embedded rotor having a good resin filling property in a resin embedding portion of a slot.

上述した課題を解決し、目的を達成するために、本発明は、複数のスロットを外周に沿って等間隔に配置した円形の珪素鋼板を、多数積層して円柱状に形成し、厚さ及び幅が前記スロットの径方向の幅及び周方向の幅より小さい板状の磁石を前記スロットに埋込み、前記スロットと前記磁石との間の間隙に樹脂又は接着剤を充填して前記スロット内に前記磁石を固定した磁石埋込型回転子において、前記スロットの所定の辺から前記スロット内に突出し前記磁石を前記スロット内で位置決めする突起を、前記多数の珪素鋼板の一部にのみ設けたことを特徴とする。   In order to solve the above-described problems and achieve the object, the present invention forms a cylindrical shape by laminating a number of circular silicon steel plates having a plurality of slots arranged at equal intervals along the outer periphery, A plate-like magnet having a width smaller than the radial width and the circumferential width of the slot is embedded in the slot, and a resin or adhesive is filled in the gap between the slot and the magnet, and the slot is filled with the resin. In a magnet-embedded rotor with a fixed magnet, a protrusion that protrudes into the slot from a predetermined side of the slot and positions the magnet in the slot is provided only on a part of the multiple silicon steel plates. Features.

この発明によれば、スロットの樹脂埋込部への樹脂の充填性のよい磁石埋込型回転子が得られる、という効果を奏する。   According to the present invention, there is an effect that a magnet-embedded rotor having a good resin filling property in the resin embedding portion of the slot can be obtained.

図１は、本発明に係る磁石埋込型回転子を備える電動機を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing an electric motor including an embedded magnet rotor according to the present invention. 図２−１は、実施の形態１の磁石埋込型回転子を示す斜視図である。FIG. 2-1 is a perspective view illustrating the magnet-embedded rotor according to the first embodiment. 図２−２は、図２−１のＡ方向の矢視図である。FIG. 2-2 is a view in the direction of arrow A in FIG. 2-1. 図２−３は、図２−１のＢ方向の一部破断矢視図である。FIG. 2-3 is a partially broken arrow view in the B direction of FIG. 図２−４は、図２−２のＣ−Ｃ線に沿う断面図である。2-4 is a cross-sectional view taken along the line CC of FIG. 2-2. 図２−５は、図２−３のＤ−Ｄ線に沿う横断面図である。2-5 is a cross-sectional view taken along the line DD of FIG. 2-3. 図２−６は、図２−３のＥ−Ｅ線に沿う横断面図である。2-6 is a cross-sectional view taken along line EE in FIG. 2-3. 図２−７は、実施の形態１の磁石埋込型回転子の変形例を示す横断面図である。2-7 is a cross-sectional view illustrating a modification of the magnet-embedded rotor according to the first embodiment. 図３は、実施の形態２の磁石埋込型回転子を示すスロットの縦断面図である。FIG. 3 is a longitudinal sectional view of a slot showing the magnet-embedded rotor according to the second embodiment. 図４は、実施の形態３の磁石埋込型回転子を示す横断面図である。FIG. 4 is a cross-sectional view showing the magnet-embedded rotor according to the third embodiment. 図５は、実施の形態４の磁石埋込型回転子を示す横断面図である。FIG. 5 is a cross-sectional view showing a magnet-embedded rotor according to the fourth embodiment. 図６は、実施の形態５の磁石埋込型回転子を示す横断面図である。FIG. 6 is a cross-sectional view showing a magnet-embedded rotor according to the fifth embodiment.

以下に、本発明にかかる磁石埋込型回転子の実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。   Embodiments of a magnet-embedded rotor according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

実施の形態１．
図１は、本発明に係る磁石埋込型回転子を備える電動機を示す縦断面図であり、図２−１は、実施の形態１の磁石埋込型回転子を示す斜視図であり、図２−２は、図２−１のＡ方向の矢視図であり、図２−３は、図２−１のＢ方向の一部破断矢視図であり、図２−４は、図２−２のＣ−Ｃ線に沿う断面図であり、図２−５は、図２−３のＤ−Ｄ線に沿う横断面図であり、図２−６は、図２−３のＥ−Ｅ線に沿う横断面図であり、図２−７は、実施の形態１の磁石埋込型回転子の変形例を示すスロットの縦断面図である。 Embodiment 1 FIG.
1 is a longitudinal sectional view showing an electric motor including an embedded magnet rotor according to the present invention, and FIG. 2A is a perspective view showing an embedded magnet rotor according to the first embodiment. 2-2 is an arrow view in the A direction in FIG. 2-1, FIG. 2-3 is a partially broken arrow view in the B direction in FIG. 2-1, and FIG. 2 is a cross-sectional view taken along the line CC of FIG. 2; FIG. 2-5 is a cross-sectional view taken along the line DD of FIG. 2-3; FIG. 2-7 is a longitudinal sectional view of a slot showing a modification of the magnet-embedded rotor according to the first embodiment.

図１に示すように、実施の形態１の電動機９１は、円筒状のフレーム１１と、フレーム１１内に嵌合された円筒状のステータ１２と、ステータ１２のティースに巻装されたコイル１３と、フレーム１１の両端部に固定された円盤状のブラケット１４と、ブラケット１４の中央に固定されたベアリング１５と、ベアリング１５に回転自在に支持されたシャフト１６と、シャフト１６に外嵌されステータ１２内に配置された実施の形態１の磁石埋込型回転子２１と、反負荷側のブラケット１４に取付けられ、シャフト１６の回転を検出する検出器１７と、を備えて成る。   As shown in FIG. 1, the electric motor 91 of Embodiment 1 includes a cylindrical frame 11, a cylindrical stator 12 fitted in the frame 11, and a coil 13 wound around the teeth of the stator 12. The disc-like bracket 14 fixed to both ends of the frame 11, the bearing 15 fixed to the center of the bracket 14, the shaft 16 rotatably supported by the bearing 15, and the stator 12 fitted on the shaft 16. The magnet-embedded rotor 21 according to the first embodiment and the detector 17 that is attached to the anti-load side bracket 14 and detects the rotation of the shaft 16 are provided.

図２−１〜図２−６に示すように、実施の形態１の磁石埋込型回転子２１は、四つ（複数）のスロット２１ａを外周に沿って等間隔に配置した円形の珪素鋼板２１ｂ、２１ｃ（図２−４参照）を、多数積層して円柱状に形成した積層鉄心２１ｍを備えている。円柱状の磁石埋込型回転子２１の中央には、シャフト１６が嵌合固定される軸孔が設けられている。スロット２１ａの径方向の幅及び周方向の幅（円弧幅）は、埋め込まれる磁石３０の径方向の厚さ及び周方向の幅（円弧幅）より大きく形成されている。   As shown in FIGS. 2-1 to 2-6, the embedded magnet rotor 21 of the first embodiment is a circular silicon steel plate in which four (plural) slots 21a are arranged at equal intervals along the outer periphery. A laminated iron core 21m formed by laminating a large number of 21b and 21c (see FIG. 2-4) into a cylindrical shape is provided. A shaft hole into which the shaft 16 is fitted and fixed is provided in the center of the cylindrical magnet embedded rotor 21. The radial width and the circumferential width (arc width) of the slot 21a are formed larger than the radial thickness and the circumferential width (arc width) of the magnet 30 to be embedded.

図２−５に示すように、珪素鋼板２１ｃには、スロット２１ａの周方向端部の辺からスロット２１ａ内に突出し磁石３０をスロット２１ａの中央に位置決めする矩形の突起２１ｄが設けられている。また、図２−６に示すように、珪素鋼板２１ｂには、スロット２１ａ内に突出する突起は設けられていない。積層鉄心２１ｍは、大部分が突起を有していない珪素鋼板２１ｂで構成され、一部分が突起２１ｄを有する珪素鋼板２１ｃで構成されている。   As shown in FIG. 2-5, the silicon steel plate 21c is provided with a rectangular protrusion 21d that protrudes into the slot 21a from the edge of the circumferential end of the slot 21a and positions the magnet 30 at the center of the slot 21a. Moreover, as shown to FIGS. 2-6, the protrusion which protrudes in the slot 21a is not provided in the silicon steel plate 21b. The laminated iron core 21m is mainly composed of a silicon steel plate 21b having no projections, and a part thereof is composed of a silicon steel plate 21c having projections 21d.

図２−４に示すように、実施の形態１の磁石埋込型回転子２１は、突起２１ｄを有する複数枚（例えば２枚）の珪素鋼板２１ｃを、磁石３０の軸方向両端部寄り｛突起が設けられていない複数枚（例えば２枚）の軸方向両端部の珪素鋼板２１ｂの内側｝に配置している。図２−４では、突起２１ｄと磁石３０との間に間隙が存在するが、実際には、間隙は無いか微小間隙となっている。他の図面も同様である。   As shown in FIG. 2-4, the magnet-embedded rotor 21 according to the first embodiment has a plurality of (for example, two) silicon steel plates 21c each having a protrusion 21d. Are arranged on the inner side of the silicon steel plates 21b at both ends in the axial direction of a plurality of sheets (for example, two sheets) that are not provided. In FIG. 2-4, there is a gap between the protrusion 21d and the magnet 30, but actually there is no gap or a minute gap. The same applies to the other drawings.

突起２１ｄにガイドさせて、磁石３０をスロット２１ａ内に挿入し、スロット２１ａと磁石３０との間の間隙に樹脂４０を充填して固化させ、スロット２１ａ内に磁石３０を固定すれば、実施の形態１の磁石埋込型回転子２１が完成する。   If the magnet 30 is inserted into the slot 21a while being guided by the protrusion 21d, the resin 40 is filled in the gap between the slot 21a and the magnet 30 and solidified, and the magnet 30 is fixed in the slot 21a, The magnet-embedded rotor 21 of Mode 1 is completed.

実施の形態１の磁石埋込型回転子２１は、磁石３０をスロット２１ａの中央に位置決めする矩形の突起２１ｄを有する複数枚の珪素鋼板２１ｃを、磁石３０の軸方向両端部寄りに配置しているので、スロット２１ａ内の磁石３０の位置精度が高い。   In the magnet embedded rotor 21 of the first embodiment, a plurality of silicon steel plates 21c having rectangular protrusions 21d for positioning the magnet 30 at the center of the slot 21a are arranged near both axial ends of the magnet 30. Therefore, the positional accuracy of the magnet 30 in the slot 21a is high.

また、スロット２１ａと磁石３０との間の間隙（流路）へ樹脂４０を充填するときの圧力損失は、各流路面積をＳｎ、各流路長をＬｎとすると、次の数式（１）で表される。

Figure 0006114115
The pressure loss when the resin 40 is filled in the gap (flow path) between the slot 21a and the magnet 30 is expressed by the following formula (1), where Sn is the flow area and Ln is the flow path length. It is represented by
Figure 0006114115

スロット２１ａと磁石３０との間の間隙（流路）への樹脂４０の充填性（流れ易さ）は、圧力損失が小さいほど良好であるが、実施の形態１の磁石埋込型回転子２１は、突起２１ｄを有する（流路面積Ｓｎの狭い）珪素鋼板２１ｃの流路長が短く、突起を有しない（流路面積Ｓｎの広い）珪素鋼板２１ｂの流路長が長いので、樹脂４０の充填性が良い。   The filling property (ease of flow) of the resin 40 into the gap (flow path) between the slot 21a and the magnet 30 is better as the pressure loss is smaller, but the embedded magnet rotor 21 of the first embodiment. Since the flow path length of the silicon steel plate 21c having the protrusions 21d (narrow flow path area Sn) is short and the flow path length of the silicon steel plate 21b having no protrusions (wide flow area Sn) is long, Good fillability.

実施の形態１の積層鉄心２１ｍは、突起を有していない珪素鋼板２１ｂと、突起２１ｄを有する珪素鋼板２１ｃで構成されており、突起２１ｄを配置したい位置に珪素鋼板２１ｃを積層することにより、突起２１ｄの配置位置を任意に変更することができる。また、珪素鋼板２１ｂの積層枚数を増減することにより、積層鉄心２１ｍの長さを任意に変更することができる。   The laminated iron core 21m of the first embodiment is composed of a silicon steel plate 21b having no protrusion and a silicon steel plate 21c having a protrusion 21d. By laminating the silicon steel plate 21c at a position where the protrusion 21d is to be disposed, The arrangement position of the protrusion 21d can be arbitrarily changed. Further, the length of the laminated iron core 21m can be arbitrarily changed by increasing or decreasing the number of laminated silicon steel plates 21b.

図２−７に示すように、実施の形態１の磁石埋込型回転子２１の変形例として、珪素鋼板２１ｃに、スロット２１ａの周方向端部の辺からスロット２１ａ内に突出し磁石３０をスロット２１ａの周方向中央に位置決めする台形（先細）の突起２１ｅを設けると共に、スロット２１ａの径方向外側及び内側の辺からスロット２１ａ内に径方向に突出し磁石３０をスロット２１ａの径方向中央に位置決めする台形（先細）の突起２１ｆを設けてもよい。突起２１ｅ及び２１ｆを設けることにより、磁石３０をスロット２１ａの周方向及び径方向の中央に精密に位置決めすることができる。   As shown in FIG. 2-7, as a modified example of the magnet embedded rotor 21 of the first embodiment, a silicon steel plate 21c is protruded into the slot 21a from the side of the circumferential end of the slot 21a and the magnet 30 is inserted into the slot. A trapezoidal (tapered) protrusion 21e is provided at the center in the circumferential direction of 21a, and projects radially into the slot 21a from the radially outer and inner sides of the slot 21a to position the magnet 30 at the center in the radial direction of the slot 21a. A trapezoidal (tapered) protrusion 21f may be provided. By providing the protrusions 21e and 21f, the magnet 30 can be precisely positioned at the center in the circumferential direction and the radial direction of the slot 21a.

実施の形態２．
図３は、実施の形態２の磁石埋込型回転子を示すスロットの縦断面図である。図３に示すように、実施の形態２の磁石埋込型回転子２２は、実施の形態１の磁石埋込型回転子２１よりも軸方向に長く形成され、スロット２２ａには、軸方向に複数の磁石３１が埋め込まれている。突起２２ｄを有する珪素鋼板２２ｃを、夫々の磁石３１の軸方向両端部寄りに１枚又は複数枚づつ配置し、他の部分は、突起を有さない珪素鋼板２２ｂを積層している。 Embodiment 2. FIG.
FIG. 3 is a longitudinal sectional view of a slot showing the magnet-embedded rotor according to the second embodiment. As shown in FIG. 3, the embedded magnet rotor 22 of the second embodiment is formed longer in the axial direction than the embedded magnet rotor 21 of the first embodiment, and the slot 22a has an axial direction. A plurality of magnets 31 are embedded. One or a plurality of silicon steel plates 22c having protrusions 22d are arranged near the axial end portions of each magnet 31, and the other portions are laminated with silicon steel plates 22b having no protrusions.

実施の形態２の磁石埋込型回転子２２は、突起２２ｄを有する（流路面積Ｓｎの狭い）珪素鋼板２２ｃの流路長が短く、突起を有しない（流路面積Ｓｎの広い）珪素鋼板２２ｂの流路長が長いので、樹脂４０の充填性が良い。   The magnet-embedded rotor 22 of the second embodiment has a silicon steel plate 22c having a projection 22d (narrow channel area Sn) and a short channel length and no projection (wide channel area Sn). Since the flow path length of 22b is long, the filling property of the resin 40 is good.

実施の形態３．
図４は、実施の形態３の磁石埋込型回転子を示す横断面図である。図４に示すように、実施の形態３の磁石埋込型回転子２３の珪素鋼板２３ｃには、スロット２３ａの周方向端部の辺からスロット２３ａ内に突出し磁石３０をスロット２３ａの周方向の中央に位置決めする三角形（先細）の突起２３ｄが設けられている。 Embodiment 3 FIG.
FIG. 4 is a cross-sectional view showing the magnet-embedded rotor according to the third embodiment. As shown in FIG. 4, the silicon steel plate 23c of the magnet-embedded rotor 23 according to the third embodiment projects into the slot 23a from the edge of the circumferential end of the slot 23a, and the magnet 30 extends in the circumferential direction of the slot 23a. A triangular (tapered) protrusion 23d is provided at the center.

実施の形態３の珪素鋼板２３ｃの突起２３ｄは、三角形であり、実施の形態１の珪素鋼板２１ｃの矩形の突起２１ｄと比較して面積が狭いので、樹脂４０を充填するための流路面積が広くなり、樹脂４０の充填性がさらに改善されている。   The projections 23d of the silicon steel plate 23c of the third embodiment are triangular and have a smaller area than the rectangular projections 21d of the silicon steel plate 21c of the first embodiment, so that the flow path area for filling the resin 40 is small. The filling property of the resin 40 is further improved.

実施の形態４．
図５は、実施の形態４の磁石埋込型回転子を示す横断面図である。図５に示すように、実施の形態４の磁石埋込型回転子２４の珪素鋼板２４ｃには、スロット２４ａの径方向外側の辺からスロット２４ａ内に突出し、磁石３２の凹部と嵌合して磁石３２をスロット２４ａの径方向外側、周方向中央に位置決めする矩形の突起２４ｄが設けられている。 Embodiment 4 FIG.
FIG. 5 is a cross-sectional view showing a magnet-embedded rotor according to the fourth embodiment. As shown in FIG. 5, the silicon steel plate 24c of the embedded magnet type rotor 24 of the fourth embodiment protrudes into the slot 24a from the radially outer side of the slot 24a and fits into the recess of the magnet 32. A rectangular protrusion 24d is provided for positioning the magnet 32 at the radially outer side of the slot 24a and at the center in the circumferential direction.

実施の形態４の珪素鋼板２４ｃの突起２４ｄは、矩形であり、磁石３２の凹部と嵌合するので、磁石３２を高精度に位置決めすることができる。   Since the projection 24d of the silicon steel plate 24c of the fourth embodiment is rectangular and fits into the recess of the magnet 32, the magnet 32 can be positioned with high accuracy.

実施の形態５．
図６は、実施の形態５の磁石埋込型回転子を示す横断面図である。図６に示すように、実施の形態５の磁石埋込型回転子２５の珪素鋼板２５ｃには、スロット２５ａの周方向の一端の辺からスロット２５ａ内に突出し、磁石３０の他端をスロット２５ａの周方向他端に位置決めする突起２５ｄが設けられている。なお、スロット２５ａの径方向の外側又は内側の辺からスロット２５ａ内に突出し、磁石３０の径方向の内側又は外側をスロット２５ａの径方向内側又は外側に位置決めする突起を設けてもよい。 Embodiment 5. FIG.
FIG. 6 is a cross-sectional view showing a magnet-embedded rotor according to the fifth embodiment. As shown in FIG. 6, the silicon steel plate 25c of the embedded magnet type rotor 25 of the fifth embodiment projects into the slot 25a from one side in the circumferential direction of the slot 25a, and the other end of the magnet 30 is inserted into the slot 25a. A protrusion 25d for positioning at the other circumferential end is provided. In addition, a protrusion that protrudes into the slot 25a from the radially outer side or inner side of the slot 25a and positions the radially inner side or outer side of the magnet 30 on the radially inner side or outer side of the slot 25a may be provided.

実施の形態６．
実施の形態１〜５の磁石埋込型回転子２１〜２５のスロット２１ａ〜２５ａに充填する樹脂４０は、熱硬化性樹脂であっても、熱可塑性樹脂であってもよい。また、樹脂４０に替えて、接着剤を用いてもよい。 Embodiment 6 FIG.
The resin 40 filled in the slots 21a to 25a of the magnet-embedded rotors 21 to 25 of the first to fifth embodiments may be a thermosetting resin or a thermoplastic resin. Further, instead of the resin 40, an adhesive may be used.

１１ フレーム、１２ ステータ、１３ コイル、１４ ブラケット、１５ ベアリング、１６ シャフト、１７ 検出器、２１，２２，２３，２４，２５ 磁石埋込型回転子、２１ａ，２２ａ，２３ａ，２４ａ，２５ａ スロット、２１ｂ，２１ｃ，２２ｂ，２２ｃ，２３ｃ，２４ｃ，２５ｃ 珪素鋼板、２１ｄ，２１ｅ，２１ｆ，２２ｄ，２３ｄ，２４ｄ，２５ｄ 突起、２１ｍ 積層鉄心、３０，３１，３２ 磁石、４０ 樹脂、９１ 電動機。   11 Frame, 12 Stator, 13 Coil, 14 Bracket, 15 Bearing, 16 Shaft, 17 Detector, 21, 22, 23, 24, 25 Embedded magnet rotor, 21a, 22a, 23a, 24a, 25a Slot, 21b , 21c, 22b, 22c, 23c, 24c, 25c Silicon steel plate, 21d, 21e, 21f, 22d, 23d, 24d, 25d Protrusion, 21m Laminated core, 30, 31, 32 Magnet, 40 Resin, 91 Electric motor.

Claims (7)

複数のスロットを外周に沿って等間隔に配置した円形の珪素鋼板が多数積層されて円柱状に形成され、厚さ及び幅が前記スロットの径方向の幅及び周方向の幅より小さい板状であり前記スロットに埋込まれた磁石と、前記スロットと前記磁石との間の間隙に充填されて前記スロット内に前記磁石を固定する樹脂又は接着剤と、を備える磁石埋込型回転子において、
前記スロットの所定の辺から前記スロット内に突出し前記磁石を前記スロット内で位置決めする突起を、前記多数の珪素鋼板の一部にのみ設け、
前記突起と前記磁石との間に前記樹脂又は前記接着剤を有し、
前記スロットには、軸方向に複数の磁石が埋め込まれ、前記突起を有する珪素鋼板を、夫々の磁石の軸方向両端部寄りに配置したことを特徴とする磁石埋込型回転子。 A large number of circular silicon steel plates each having a plurality of slots arranged at equal intervals along the outer periphery are laminated to form a columnar shape, and the thickness and the width are smaller than the radial width and the circumferential width of the slot. A magnet-embedded rotor comprising: a magnet embedded in the slot; and a resin or an adhesive that is filled in a gap between the slot and the magnet to fix the magnet in the slot.
Protrusions projecting into the slot from a predetermined side of the slot and positioning the magnet in the slot are provided only on a part of the multiple silicon steel plates,
Possess the resin or the adhesive between the protrusion and the magnet,
A magnet-embedded rotor, wherein a plurality of magnets are embedded in the slot in the axial direction, and a silicon steel plate having the protrusions is disposed near both axial ends of each magnet. 前記突起を有する珪素鋼板を、前記磁石の軸方向両端部寄りに配置したことを特徴とする請求項１に記載の磁石埋込型回転子。   The embedded magnet rotor according to claim 1, wherein the silicon steel plate having the protrusions is disposed near both axial end portions of the magnet. 前記突起は、前記スロットの周方向端部の辺から前記スロット内に突出していることを特徴とする請求項１に記載の磁石埋込型回転子。   The embedded magnet rotor according to claim 1, wherein the protrusion protrudes into the slot from a side of a circumferential end of the slot. 前記突起は、前記スロットの径方向外側又は内側の辺から前記スロット内に突出していることを特徴とする請求項１に記載の磁石埋込型回転子。   The embedded magnet rotor according to claim 1, wherein the protrusion protrudes into the slot from a radially outer side or inner side of the slot. 前記突起は、先細に形成されていることを特徴とする請求項１に記載の磁石埋込型回転子。   The embedded magnet rotor according to claim 1, wherein the protrusion is tapered. 前記突起は、前記スロットの径方向外側の辺から前記スロット内に突出し、前記磁石に設けられた凹部と嵌合していることを特徴とする請求項１に記載の磁石埋込型回転子。   2. The magnet-embedded rotor according to claim 1, wherein the protrusion protrudes into the slot from a radially outer side of the slot and fits into a recess provided in the magnet. 前記突起は、スロットの周方向の一端の辺から前記スロット内に突出し、前記磁石の他端をスロットの周方向他端に位置決めすることを特徴とする請求項１に記載の磁石埋込型回転子。   2. The magnet-embedded rotation according to claim 1, wherein the projection protrudes into the slot from one side in the circumferential direction of the slot and positions the other end of the magnet in the other circumferential end of the slot. Child.
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