JP5864227B2 - Rotor structure of electric motor - Google Patents
Rotor structure of electric motor Download PDFInfo
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- JP5864227B2 JP5864227B2 JP2011252977A JP2011252977A JP5864227B2 JP 5864227 B2 JP5864227 B2 JP 5864227B2 JP 2011252977 A JP2011252977 A JP 2011252977A JP 2011252977 A JP2011252977 A JP 2011252977A JP 5864227 B2 JP5864227 B2 JP 5864227B2
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- 239000011347 resin Substances 0.000 claims description 25
- 229920005989 resin Polymers 0.000 claims description 25
- 238000010030 laminating Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000012811 non-conductive material Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 229910000565 Non-oriented electrical steel Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Description
本発明は、電動機のロータ構造に関し、詳しくは、電磁鋼板により略円環状に形成されたコア部材を積層してなるロータコアを有するロータと、内径がロータコアの外径よりも若干大きくなるよう形成されたステータコアを有するステータと、を備える電動機のロータ構造に関する。 The present invention relates to a rotor structure for an electric motor, and more specifically, a rotor having a rotor core formed by laminating core members formed in a substantially annular shape from electromagnetic steel sheets, and an inner diameter that is slightly larger than the outer diameter of the rotor core. And a stator having a stator core.
従来、この種の電動機のロータ構造としては、外表面を樹脂でコーティングした磁石をロータコアの磁石孔に挿入した状態で、磁石孔と磁石との隙間を樹脂を充填して磁石を固定することによりロータを形成するものが提案されている（例えば、特許文献１参照）。この電動機のロータ構造では、磁石の外表面を樹脂でコーティングすることにより、磁石とコアとの接触を防止し、磁石とコアとの接触することによって渦電流が発生し、損失が大きくなるのを抑制している。 Conventionally, this type of electric motor has a rotor structure in which a magnet whose outer surface is coated with resin is inserted into the magnet hole of the rotor core, and the gap between the magnet hole and the magnet is filled with resin to fix the magnet. One that forms a rotor has been proposed (see, for example, Patent Document 1). In the rotor structure of this electric motor, the outer surface of the magnet is coated with a resin to prevent contact between the magnet and the core, and contact between the magnet and the core generates eddy currents and increases the loss. Suppressed.
また、磁石をロータコアの磁石孔に挿入した状態で、磁石と磁石孔の隙間に非導電性材料により形成された粒子を混在させた樹脂を充填して磁石を固定することによりロータを形成するものも提案されている（例えば、特許文献２参照）。この電動機のロータ構造では、磁石と磁石孔との隙間に非導電性材料により形成された粒子が介在することにより、磁石とコアとの接触を防止し、磁石とコアとの接触することによって渦電流が発生し、損失が大きくなるのを抑制している。 Also, with the magnet inserted into the magnet hole of the rotor core, the rotor is formed by filling the gap between the magnet and the magnet hole with a resin in which particles formed of a non-conductive material are mixed and fixing the magnet Has also been proposed (see, for example, Patent Document 2). In this rotor structure of an electric motor, particles formed of a non-conductive material are interposed in the gap between the magnet and the magnet hole, thereby preventing contact between the magnet and the core, and vortex by contacting the magnet and the core. Current is generated and the loss is suppressed from increasing.
しかしながら、外表面を樹脂でコーティングした磁石をロータコアの磁石孔に挿入する前者の電動機のロータ構造では、予め磁石の外表面を樹脂でコーティングする必要があり、電動機を製造する工数が増加してしまう。また、コーティングの厚みの分だけ、磁石孔を大きく形成する必要があり、磁石とコアとのクリアランスが増加してしまう。磁石とコアとのクリアランスが増加すると、電動機からの出力トルクが低下する場合が生じ、電動機の性能の低下させてしまう。 However, in the former motor rotor structure in which a magnet whose outer surface is coated with resin is inserted into the magnet hole of the rotor core, it is necessary to coat the outer surface of the magnet with resin in advance, which increases the number of steps for manufacturing the motor. . Moreover, it is necessary to make a magnet hole large as much as the thickness of the coating, and the clearance between the magnet and the core increases. When the clearance between the magnet and the core increases, the output torque from the electric motor may be reduced, and the performance of the electric motor is reduced.
また、非導電性材料により形成された粒子を混在させた樹脂により磁石を固定する後者の電動機のロータ構造では、非導電性材料により形成された粒子を磁石と磁石孔との隙間に均等に混在させる必要から、磁石孔を大きく形成する必要があり、磁石とコアとのクリアランスが増加し、電動機の性能を低下させてしまう。 Also, in the latter rotor structure of the motor, in which the magnet is fixed by a resin mixed with particles formed of non-conductive material, particles formed of non-conductive material are mixed evenly in the gap between the magnet and the magnet hole. Therefore, it is necessary to form a large magnet hole, which increases the clearance between the magnet and the core, thereby reducing the performance of the electric motor.
本発明の電動機のロータ構造は、電動機を製造する際の工数を減少させつつ磁石とコアとの接触により発生する渦電流による損失を抑制することを主目的とする。 The main object of the rotor structure of the electric motor of the present invention is to suppress the loss due to the eddy current generated by the contact between the magnet and the core while reducing the man-hours for manufacturing the electric motor.
本発明の電動機のロータ構造は、上述の主目的を達成するために以下の手段を採った。 The motor rotor structure of the present invention employs the following means in order to achieve the above-mentioned main object.
本発明の電動機のロータ構造は、
電磁鋼板により略円環状に形成されたコア部材を積層してなるロータコアを有するロータと、内径が前記ロータコアの外径よりも若干大きくなるよう形成されたステータコアを有するステータと、を備える電動機のロータ構造において、
前記コア部材は、磁石を埋め込むための磁石孔が磁石を埋め込んだときに磁石に接触しない程度のクリアランスを有するよう第１の磁石孔形状に形成された第１のコア部材と、磁石を埋め込むための磁石孔が磁石を埋め込んだときに磁石に一部が接触して磁石を保持するよう第２の磁石孔形状に形成されていると共に磁石孔の形状以外は前記第１のコア部材と同一形状に形成された第２のコア部材と、の少なくとも２種類であり、
前記ロータコアは、複数の前記第１のコア部材と少なくとも１枚の第２のコア部材とを磁石孔が整合するよう積層し、該積層した状態で磁石孔に磁石を配置した状態で磁石孔と磁石との隙間に樹脂を充填してなる、
ことを要旨とする。
The rotor structure of the electric motor of the present invention is
A rotor of an electric motor comprising: a rotor having a rotor core formed by laminating core members formed in a substantially annular shape from electromagnetic steel plates; and a stator having a stator core formed so that an inner diameter is slightly larger than an outer diameter of the rotor core. In structure
The core member has a first core member formed in a first magnet hole shape so that the magnet hole for embedding the magnet has a clearance that does not contact the magnet when the magnet is embedded, and for embedding the magnet. The magnet hole is formed in a second magnet hole shape so that a part of the magnet hole comes into contact with and holds the magnet when the magnet hole is embedded, and the same shape as the first core member except for the shape of the magnet hole And at least two types of second core members formed in
The rotor core is formed by laminating a plurality of the first core members and at least one second core member so that the magnet holes are aligned, and in a state where the magnets are arranged in the magnet holes in the laminated state, Filling the gap with the magnet with resin,
This is the gist.
この本発明の電動機のロータ構造では、磁石を埋め込むための磁石孔が磁石を埋め込んだときに磁石に接触しない程度のクリアランスを有するよう第１の磁石孔形状に形成された第１のコア部材と、磁石を埋め込むための磁石孔が磁石を埋め込んだときに磁石に一部が接触して磁石を保持するよう第２の磁石孔形状に形成されていると共に磁石孔の形状以外は第１のコア部材と同一形状に形成された第２のコア部材と、を予め準備しておき、複数の第１のコア部材と少なくとも１枚の第２のコア部材とを磁石孔が整合するよう積層して積層体を形成し、この積層体の磁石孔に磁石を配置した状態で磁石孔と磁石との隙間に樹脂を充填して磁石を固定することにより、ロータコアを製造する。積層体には、第２のコア部材が少なくとも１枚混在するため、積層体の磁石孔に磁石を配置したときには、磁石は第２のコア部材の磁石孔に接触することにより、多数の第１のコア部材の磁石孔とは接触しないよう位置決めされる。この位置決めされた状態で磁石孔と磁石との隙間に樹脂が充填されて磁石が固定されるため、磁石は第２のコア部材に接触しているものの多数の第１のコア部材とは接触しないよう固定されることになる。磁石とコアとの接触により生じる渦電流による損失（渦損）は磁石とコアとの接触面積の２乗に比例するから、本発明の電動機のロータ構造における渦損は、第１のコア部材の磁石孔と磁石との接触面積に応じたものとなる。したがって、本発明の電動機のロータ構造では、磁石の位置決めを行なわずに樹脂を充填して固定することにより磁石が多くのコアに接触した状態で固定されたものに比して、渦損を小さく抑制することができる。また、予め磁石の外表面を樹脂でコーティングするものではないから、こうしたコーティングを施すものに比して、ロータの製造工数、即ち電動機の製造する際の工数を減少させることができる。さらに、磁石孔は磁石を固定するために必要な隙間だけ磁石のサイズより大きく形成されていればよいから、磁石孔と磁石とのクリアランスを必要以上に大きくする必要がない。このため、磁石孔と磁石とのクリアランスが増加することにより電動機の性能が低下するのを抑制することができる。 In the rotor structure of the electric motor of the present invention, the first core member formed in the first magnet hole shape so that the magnet hole for embedding the magnet has a clearance that does not contact the magnet when the magnet is embedded; A magnet hole for embedding a magnet is formed in a second magnet hole shape so that a part of the magnet comes into contact with and holds the magnet when the magnet is embedded, and the first core except for the shape of the magnet hole A second core member formed in the same shape as the member is prepared in advance, and a plurality of first core members and at least one second core member are stacked so that the magnet holes are aligned. A rotor core is manufactured by forming a laminated body, filling a gap between the magnet hole and the magnet, and fixing the magnet in a state where the magnet is disposed in the magnet hole of the laminated body. Since at least one second core member is mixed in the laminated body, when a magnet is arranged in the magnet hole of the laminated body, the magnet comes into contact with the magnet holes of the second core member, so that a large number of first core members are arranged. The core member is positioned so as not to contact the magnet hole. In this positioned state, the gap between the magnet hole and the magnet is filled with resin and the magnet is fixed, so that the magnet is in contact with the second core member but not in contact with the multiple first core members. Will be fixed. Since the loss due to the eddy current caused by the contact between the magnet and the core (eddy loss) is proportional to the square of the contact area between the magnet and the core, the eddy loss in the rotor structure of the electric motor according to the present invention This corresponds to the contact area between the magnet hole and the magnet. Therefore, in the rotor structure of the electric motor of the present invention, the vortex loss is reduced as compared with the case where the magnet is fixed in contact with many cores by filling and fixing the resin without positioning the magnet. Can be suppressed. Further, since the outer surface of the magnet is not previously coated with a resin, the number of man-hours for manufacturing the rotor, that is, the number of man-hours for manufacturing the electric motor, can be reduced as compared with the case where such a coating is applied. Furthermore, since the magnet hole only needs to be formed larger than the magnet size by a gap necessary for fixing the magnet, it is not necessary to increase the clearance between the magnet hole and the magnet more than necessary. For this reason, it can suppress that the performance of an electric motor falls by the clearance between a magnet hole and a magnet increasing.
こうした本発明の電動機のロータ構造において、前記第２のコア部材は前記ロータコアの略中央となるよう配置されてなる、ものとすることもできる。こうすれば、磁石の位置決めが容易なものとなる。また、本発明の電動機のロータ構造において、前記第２の磁石孔形状は、前記第２の磁石孔形状は、磁石に接触する接触部として前記第１の磁石孔形状に対して内側に凸となる凸部が複数形成された形状である、ものとすることもできる。こうすれば、磁石の位置決めが容易なものとなる。 In such a rotor structure of the electric motor of the present invention, the second core member may be arranged so as to be substantially at the center of the rotor core. If it carries out like this, the positioning of a magnet will become easy. Further, in the rotor structure of the electric motor of the present invention, the second magnet hole shape is convex inward with respect to the first magnet hole shape as a contact portion in contact with the magnet. It can also be a shape in which a plurality of convex portions are formed. If it carries out like this, the positioning of a magnet will become easy.
次に、本発明を実施するための形態を実施例を用いて説明する。 Next, the form for implementing this invention is demonstrated using an Example.
本発明の一実施例としてのロータ構造を備える電動機は、電磁鋼板により略円環状に形成されたコア部材を積層してなるロータコアを有するロータと、内径がロータコアの外径よりも若干大きくなるよう形成されたステータコアを有するステータと、を備えるＰＭ型同期発電電動機として構成されている。ロータコアは、複数の第１のコア部材２０と少なくとも１枚の第２のコア部材３０とを、第２のコア部材３０が略中央に位置するように積層することにより形成される。ステータは、一般的な周知の構造として形成されており、本発明の中核をなさないため、その図示およびその詳細な説明は省略する。以下、本発明の中核をなすロータ、特にロータコアを構成するコア部材の構成について説明する。図１は実施例の電動機のロータ構造に用いられる第１のコア部材２０の構成の概略を示す構成図であり、図２は実施例の電動機のロータ構造に用いられる第２のコア部材３０の構成の概略を示す構成図である。 An electric motor having a rotor structure as one embodiment of the present invention includes a rotor having a rotor core formed by laminating core members formed in a substantially annular shape by electromagnetic steel plates, and an inner diameter slightly larger than an outer diameter of the rotor core. A PM type synchronous generator motor including a stator having a formed stator core. The rotor core is formed by laminating a plurality of first core members 20 and at least one second core member 30 so that the second core member 30 is positioned substantially at the center. Since the stator is formed as a general well-known structure and does not form the core of the present invention, illustration and detailed description thereof are omitted. Hereinafter, the structure of the core which comprises the rotor which makes the core of this invention, especially a rotor core is demonstrated. FIG. 1 is a configuration diagram showing an outline of the configuration of the first core member 20 used in the rotor structure of the electric motor of the embodiment, and FIG. 2 shows the second core member 30 used in the rotor structure of the electric motor of the embodiment. It is a block diagram which shows the outline of a structure.
第１のコア部材２０は、図１に示すように、無方向性電磁鋼板を打ち抜き加工等により略円管状に形成されており、外周縁近傍には、２個一対で計１６個の矩形形状の第１の磁石孔２２ａ〜２２ｐが形成されている。第１の磁石孔２２ａ〜２２ｐは、同一形状に形成されており、ここに挿入する磁石４０の外形に対して樹脂を充填して磁石４０を固定するのに必要なクリアランス（隙間）が設けることができるサイズに調整されている。なお、第１の磁石孔２２ａ〜２２ｐを代表して称するときには第１の磁石孔２２と記す。 As shown in FIG. 1, the first core member 20 is formed in a substantially tubular shape by punching a non-oriented electrical steel sheet, and in the vicinity of the outer peripheral edge, a pair of two, a total of 16 rectangular shapes First magnet holes 22a to 22p are formed. The first magnet holes 22a to 22p are formed in the same shape, and a clearance (gap) necessary for fixing the magnet 40 by filling the outer shape of the magnet 40 inserted therein with resin is provided. It is adjusted to the size that can be. Note that the first magnet holes 22a to 22p are referred to as the first magnet holes 22 when representatively referred to.
第２のコア部材３０は、図２に示すように、第１のコア部材２０と同一の無方向性電磁鋼板を打ち抜き加工等により第２の磁石孔３２ａ〜３２ｐの形状を除いて第１のコア部材２０と同一形状となるよう形成されている。第２の磁石孔３２ａ〜３２ｐは、矩形形状の第１のコア部材２０の第１の磁石孔２２ａ〜２２ｐの２つの長辺に凸部３４ａ〜３４ｄが形成された形状をしている。第２の磁石孔３２ａ〜３２ｐは、同一形状に形成されており、ここに磁石４０を挿入すると、凸部３４ａ〜３４ｄが磁石４０に接触するように凸部３４ａ〜３４ｄのサイズが調整されている。なお、第２の磁石孔３２ａ〜３２ｐを代表して称するときには第２の磁石孔３２と記す。 As shown in FIG. 2, the second core member 30 is formed by punching the same non-oriented electrical steel sheet as the first core member 20 except for the shapes of the second magnet holes 32 a to 32 p. It is formed to have the same shape as the core member 20. The second magnet holes 32 a to 32 p have a shape in which convex portions 34 a to 34 d are formed on the two long sides of the first magnet holes 22 a to 22 p of the rectangular first core member 20. The second magnet holes 32a to 32p are formed in the same shape, and when the magnet 40 is inserted therein, the sizes of the protrusions 34a to 34d are adjusted so that the protrusions 34a to 34d are in contact with the magnet 40. Yes. The second magnet holes 32a to 32p are referred to as second magnet holes 32 when representatively referred to.
実施例の電動機のロータは、第２のコア部材３０を１枚だけ積層体の略中央に配置されるよう多数の第１のコア部材３０を第１の磁石孔２２ａ〜２２ｐおよび第２の磁石孔３２ａ〜３２ｐが整合するように積層して積層体を構成し、第１の磁石孔２２ａ〜２２ｐおよび第２の磁石孔３２ａ〜３２ｐにより形成された多数の第１のコア部材２０および１枚の第２のコア部材２０を貫通する磁石孔に磁石４０を配置して磁石孔と磁石４０とのクリアランス（隙間）に樹脂を充填して磁石４０を固定することによりロータコアを形成し、このロータコアに回転軸を取り付けることによって構成されている。図３は、第２のコア部材３０を１枚だけ積層体の略中央に配されるように多数の第１のコア部材２０を第１の磁石孔２２および第２の磁石孔３２が整合するよう積層体を構成し、磁石孔に磁石４０を配置したときの構成の一部を模式的に示す構成図であり、図４は図３における第２のコア部材３０の面の第２の磁石孔３２の部分を部分的に示す平面図である。図３に示すように、磁石４０は、積層体の略中央に配置された第２のコア部材３０の凸部３４ａ〜３４ｄが接触することにより、軸方向の芯出しが行なわれる。実施例では、この状態で磁石４０と磁石孔との隙間に樹脂を充填して磁石４０を固定する。したがって、磁石４０は、第２のコア部材３０の凸部３４ａ〜３４ｄが接触することにより軸方向の芯出しが行なわれた状態で、即ち積層体を構成する第２のコア部材３０以外の多数の第１のコア部材２０とは接触していない状態で樹脂により固定される。樹脂は、第２のコア部材３０の第２の磁石孔３２ａ〜３２ｐでは、凸部３４ａ〜３４ｄの間の隙間を通って下方の第１のコア部材３０の第１の磁石孔２２ａ〜２２ｐと磁石４０との隙間に充填される。 In the rotor of the electric motor of the embodiment, a large number of first core members 30 are arranged in the center of the laminate so that only one second core member 30 is disposed in the first magnet holes 22a to 22p and the second magnets. A plurality of first core members 20 formed by the first magnet holes 22a to 22p and the second magnet holes 32a to 32p and one sheet are formed by stacking so that the holes 32a to 32p are aligned. A rotor core is formed by disposing a magnet 40 in a magnet hole penetrating the second core member 20 and filling the clearance (gap) between the magnet hole and the magnet 40 with resin to fix the magnet 40. It is comprised by attaching a rotating shaft to. In FIG. 3, the first magnet holes 22 and the second magnet holes 32 are aligned with each other so that only one second core member 30 is arranged in the approximate center of the laminate. FIG. 4 is a configuration diagram schematically showing a part of the configuration when the laminated body is configured and the magnet 40 is arranged in the magnet hole, and FIG. 4 is a second magnet on the surface of the second core member 30 in FIG. 4 is a plan view partially showing a hole 32 portion. FIG. As shown in FIG. 3, the magnet 40 is centered in the axial direction when the convex portions 34 a to 34 d of the second core member 30 disposed in the approximate center of the laminated body come into contact with each other. In the embodiment, in this state, the gap between the magnet 40 and the magnet hole is filled with resin, and the magnet 40 is fixed. Accordingly, the magnet 40 is in a state in which the projections 34a to 34d of the second core member 30 are in contact with each other in the axial direction, that is, many magnets other than the second core member 30 constituting the laminate. The first core member 20 is fixed with resin in a state where it is not in contact with the first core member 20. In the second magnet holes 32a to 32p of the second core member 30, the resin passes through the gaps between the convex portions 34a to 34d and the first magnet holes 22a to 22p of the first core member 30 below. The gap with the magnet 40 is filled.
図５は、第２のコア部材３０を用いずに第１のコア部材２０だけを用いて第１の磁石孔２２ａ〜２２ｐが整合するように積層体を構成し、磁石孔に磁石４０を配置したときの構成の一部を模式的に示す構成図である。図示するように、第１のコア部材２０だけを用いて積層体を構成したときには、磁石４０は磁石孔の一辺または二辺に接触した状態となり易く、そのままの状態で樹脂が充填されて固定される場合も生じる。このように、図５に例示する比較例では、磁石４０が第１のコア部材３０の多くに接触するため、発生する渦電流による損失（渦損）も大きくなり、電動機の性能を低下させる。一方、実施例では、図３に示すように、磁石４０は第２のコア部材３０に接触するものの、多数の第１のコア部材２０には接触しないため、第２のコア部材３０に接触する面積に応じた渦損だけに止まる。 In FIG. 5, the laminated body is configured so that the first magnet holes 22 a to 22 p are aligned using only the first core member 20 without using the second core member 30, and the magnet 40 is disposed in the magnet hole. It is a block diagram which shows typically a part of structure at the time of doing. As shown in the figure, when the laminated body is configured using only the first core member 20, the magnet 40 is likely to be in contact with one or two sides of the magnet hole, and is filled and fixed as it is. May occur. Thus, in the comparative example illustrated in FIG. 5, since the magnet 40 is in contact with most of the first core member 30, the loss (eddy loss) due to the generated eddy current increases, and the performance of the electric motor is reduced. On the other hand, in the embodiment, as shown in FIG. 3, the magnet 40 is in contact with the second core member 30 because it is in contact with the second core member 30, but is not in contact with many first core members 20. Only vortex loss according to the area stops.
以上説明した実施例の電動機のロータ構造によれば、磁石４０に接触するように凸部３４ａ〜３４ｄが形成された第２の磁石孔３２ａ〜３２ｐを有する第２のコア部材３０を１枚だけ積層体の略中央に配置されるよう磁石４０に接触しない程度のクリアランスをもって形成された矩形形状の第１の磁石孔２２ａ〜２２ｐを有する第１のコア部材３０を第１の磁石孔２２ａ〜２２ｐおよび第２の磁石孔３２ａ〜３２ｐが整合するように多数積層して積層体を構成し、第１の磁石孔２２ａ〜２２ｐおよび第２の磁石孔３２ａ〜３２ｐにより形成された磁石孔に磁石４０を配置して磁石孔と磁石４０とのクリアランス（隙間）に樹脂を充填して磁石４０を固定してロータコアを形成することにより、磁石４０は第２のコア部材３０の第２の磁石孔３２ａ〜３２ｐの凸部３４ａ〜３４ｄには接触するが多数の第１のコア部材２０の第１の磁石孔２２ａ〜２２ｐには接触しない状態とし、磁石４０が第２のコア部材３０の第２の磁石孔３２ａ〜３２ｐの凸部３４ａ〜３４ｄに接触することによる渦電流は生じるものの、磁石４０が多数の第１のコア部材２０の第１の磁石孔２２ａ〜２２ｐに接触することによる渦電流の発生を抑制することができる。渦電流による損失（渦損）は、磁石４０と第１のコア部材２０や第２のコア部材３０との接触面積の２乗に比例するから、磁石４０と第２のコア部材３０との接触面積の２乗に応じたものに抑制することができる。これにより、渦電流による損失（渦損）を抑制し、電動機の性能が低下するのを抑制することができる。しかも、磁石４０の外表面に樹脂によるコーティングを施す必要がないから、電動機を製造する際の工数を減少させることができる。また、外表面に樹脂によるコーティングを施した磁石を磁石孔に配置するものや、非導電性材料により形成された粒子を樹脂に混在させたものを磁石と磁石孔との隙間に充填するものでは、磁石孔と磁石とのクリアランス（隙間）が大きくなるため、電動機のトルクが低下するという電動機の性能を低下させるが、実施例の電動機のロータ構造では、磁石孔と磁石とのクリアランスは樹脂を充填できる程度でよいから、磁石孔と磁石とのクリアランスを大きくすることによって生じる電動機のトルクの低下や電動機の性能の低下を抑制することができる。 According to the rotor structure of the electric motor according to the embodiment described above, only one second core member 30 having the second magnet holes 32a to 32p in which the convex portions 34a to 34d are formed so as to contact the magnet 40 is provided. The first core member 30 having the first magnet holes 22a to 22p having a rectangular shape formed with a clearance that does not come into contact with the magnet 40 so as to be arranged at the approximate center of the laminated body is used as the first magnet holes 22a to 22p. A large number of the second magnet holes 32a to 32p are aligned so as to form a laminated body, and the magnet 40 is formed in the magnet hole formed by the first magnet holes 22a to 22p and the second magnet holes 32a to 32p. The magnet 40 is filled with resin in the clearance (gap) between the magnet hole and the magnet 40 to fix the magnet 40 to form the rotor core, so that the magnet 40 has the second magnet hole 3 of the second core member 30. The projections 34 a to 34 d of a to 32 p are in contact with each other but are not in contact with the first magnet holes 22 a to 22 p of the first core member 20, and the magnet 40 is the second of the second core member 30. Although the eddy current by contact with the convex portions 34a to 34d of the magnet holes 32a to 32p is generated, the eddy current due to the magnet 40 coming into contact with the first magnet holes 22a to 22p of the multiple first core members 20 Can be suppressed. Since the loss due to eddy current (eddy loss) is proportional to the square of the contact area between the magnet 40 and the first core member 20 or the second core member 30, the contact between the magnet 40 and the second core member 30. It can suppress to the thing according to the square of the area. Thereby, the loss (eddy loss) by an eddy current can be suppressed and it can suppress that the performance of an electric motor falls. In addition, since it is not necessary to coat the outer surface of the magnet 40 with a resin, the number of man-hours for manufacturing the electric motor can be reduced. Also, a magnet with a resin-coated outer surface placed in the magnet hole, or a mixture of non-conductive material particles in the resin filled in the gap between the magnet and the magnet hole However, the clearance (gap) between the magnet hole and the magnet increases, so that the performance of the motor is reduced, that is, the torque of the motor decreases. In the rotor structure of the motor of the embodiment, the clearance between the magnet hole and the magnet is made of resin. Since it only needs to be filled, it is possible to suppress a decrease in the torque of the motor and a decrease in the performance of the motor caused by increasing the clearance between the magnet hole and the magnet.
実施例の電動機のロータ構造に用いる第２のコア部材３０では、第２の磁石孔３２ａ〜３２ｐに磁石４０に接触するための４つの凸部３４ａ〜３４ｄが形成されているものとしたが、図６の変形例の第２の磁石孔３２Ｂに例示するように、磁石４０Ｂに接触するための３つの凸部３４Ｂａ〜３４Ｂｃが形成されているものとしてもよい。 In the 2nd core member 30 used for the rotor structure of the electric motor of an example, although the four convex parts 34a-34d for contacting magnet 40 were formed in the 2nd magnet holes 32a-32p, As illustrated in the second magnet hole 32B of the modification of FIG. 6, three convex portions 34Ba to 34Bc for contacting the magnet 40B may be formed.
実施例の電動機のロータ構造では、第２のコア部材３０を１枚だけ積層体の略中央に配置されるよう多数の第１のコア部材３０を積層して積層体を構成するものとしたが、第２のコア部材３０の積層体における配置は、略中央に限定されるものではなく、上から１／４の位置や１／３の位置、下から１／４の位置や１／３の位置など、種々の位置としてもよい。 In the rotor structure of the electric motor of the embodiment, the laminated body is configured by laminating a large number of first core members 30 so that only one second core member 30 is disposed at the approximate center of the laminated body. The arrangement of the second core member 30 in the laminated body is not limited to a substantially central position, and is a 1/4 position or 1/3 position from the top, a 1/4 position or 1/3 position from the bottom. It is good also as various positions, such as a position.
実施例の電動機のロータ構造では、第２のコア部材３０を１枚だけ積層体の略中央に配置されるよう多数の第１のコア部材３０を積層して積層体を構成し、磁石孔に磁石４０を配置して樹脂の充填により磁石４０を固定することにより得られるロータコアを備えるものとしたが、第２のコア部材３０を２枚または３枚あるいは数枚だけ積層体に適当に配置されるよう多数の第１のコア部材３０を積層して積層体を構成し、形成された磁石孔に磁石４０を配置して樹脂の充填により磁石４０を固定することにより得られるロータコアを備えるものとしてもよい。この場合、第２のコア部材３０の積層体における配置は、略中央に限られず、如何なる位置に配置するものとしてもよい。 In the rotor structure of the electric motor of the embodiment, a large number of first core members 30 are laminated so that only one second core member 30 is disposed at the approximate center of the laminated body, and the laminated body is formed. Although the rotor core obtained by arranging the magnet 40 and fixing the magnet 40 by filling the resin is provided, only two, three, or several second core members 30 are appropriately arranged in the laminate. A plurality of first core members 30 are laminated to form a laminated body, and a rotor core obtained by placing the magnet 40 in the formed magnet hole and fixing the magnet 40 by filling with resin is provided. Also good. In this case, the arrangement of the second core member 30 in the stacked body is not limited to the approximate center, and may be arranged at any position.
実施例の主要な要素と課題を解決するための手段の欄に記載した発明の主要な要素との対応関係について説明する。実施例では、第１のコア部材２０が「第１のコア部材」に相当し、第２のコア部材３０が「第２のコア部材」に相当し、第２のコア部材３０を１枚だけ積層体の略中央に配置されるよう多数の第１のコア部材３０を積層して積層体を構成し、形成された磁石孔に磁石４０を配置して樹脂の充填により磁石４０を固定することにより得られるロータコアが「ロータコア」に相当する。 The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the first core member 20 corresponds to a “first core member”, the second core member 30 corresponds to a “second core member”, and only one second core member 30 is provided. A large number of first core members 30 are laminated so as to be arranged at substantially the center of the laminated body to form a laminated body, the magnet 40 is arranged in the formed magnet hole, and the magnet 40 is fixed by filling with resin. The rotor core obtained by this corresponds to the “rotor core”.
なお、実施例の主要な要素と課題を解決するための手段の欄に記載した発明の主要な要素との対応関係は、実施例が課題を解決するための手段の欄に記載した発明を実施するための形態を具体的に説明するための一例であることから、課題を解決するための手段の欄に記載した発明の要素を限定するものではない。即ち、課題を解決するための手段の欄に記載した発明についての解釈はその欄の記載に基づいて行なわれるべきものであり、実施例は課題を解決するための手段の欄に記載した発明の具体的な一例に過ぎないものである。 The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.
以上、本発明を実施するための形態について実施例を用いて説明したが、本発明はこうした実施例に何等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内において、種々なる形態で実施し得ることは勿論である。 As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.
本発明は、電動機の製造産業などに利用可能である。 The present invention can be used in the motor manufacturing industry.
２０ 第１のコア部材、２２、２２ａ〜２２ｐ 第１の磁石孔、３０ 第２のコア部材、３２，３２ａ〜３２ｐ，３２Ｂ 第２の磁石孔、３４ａ〜３４ｄ，３４Ｂａ〜３４Ｂｃ 凸部、４０，４０Ｂ 磁石。 20 1st core member, 22, 22a-22p 1st magnet hole, 30 2nd core member, 32, 32a-32p, 32B 2nd magnet hole, 34a-34d, 34Ba-34Bc Convex part, 40, 40B magnet.
Claims (3)
前記コア部材は、直方体の磁石を埋め込むための磁石孔が磁石を埋め込んだときに磁石に接触しない程度のクリアランスを有するよう第１の磁石孔形状に形成された第１のコア部材と、直方体の磁石を埋め込むための磁石孔が磁石を埋め込んだときに磁石における前記コア部材の積層方向に延在する４面のうち隣り合わない２面のそれぞれに一部が接触して磁石を保持する接触部を同一平面内で有するよう第２の磁石孔形状に形成されていると共に磁石孔の形状以外は前記第１のコア部材と同一形状に形成された第２のコア部材と 、の少なくとも２種類であり、
前記ロータコアは、複数の前記第１のコア部材と少なくとも１枚の第２のコア部材とを磁石孔が整合するよう積層し、該積層した状態で磁石孔に磁石を配置した状態で磁石孔と磁石との隙間に樹脂を充填してなる、
電動機のロータ構造。 A rotor of an electric motor comprising: a rotor having a rotor core formed by laminating core members formed in a substantially annular shape from electromagnetic steel plates; and a stator having a stator core formed so that an inner diameter is slightly larger than an outer diameter of the rotor core. In structure
The core member includes a first core member formed in a first magnet hole shape so that a magnet hole for embedding a rectangular parallelepiped magnet has a clearance that does not come into contact with the magnet when the magnet is embedded ; Contact portion that holds the magnet by partly contacting each of two non-adjacent surfaces of the four surfaces extending in the stacking direction of the core member in the magnet when the magnet hole for embedding the magnet is embedded And a second core member formed in the same shape as the first core member except for the shape of the magnet hole, and having a shape other than the shape of the magnet hole. Yes,
The rotor core is formed by laminating a plurality of the first core members and at least one second core member so that the magnet holes are aligned, and in a state where the magnets are arranged in the magnet holes in the laminated state, Filling the gap with the magnet with resin,
Electric motor rotor structure.
前記第２のコア部材は、前記ロータコアの略中央となるよう配置されてなる、
電動機のロータ構造。 The rotor structure of the electric motor according to claim 1,
The second core member is disposed so as to be substantially in the center of the rotor core.
Electric motor rotor structure.
前記第２の磁石孔形状は、前記接触部として前記第１の磁石孔形状に対して内側に凸となる凸部が複数形成された形状である、
電動機のロータ構造。
The rotor structure of the electric motor according to claim 1 or 2,
The second magnet hole shape is a shape in which a plurality of convex portions that are convex inward with respect to the first magnet hole shape are formed as the contact portion.
Electric motor rotor structure.
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| JP5999079B2 (en) | 2013-12-13 | 2016-09-28 | トヨタ自動車株式会社 | Rotating electrical machine rotor |
| JP2015162980A (en) * | 2014-02-27 | 2015-09-07 | 株式会社豊田自動織機 | Permanent magnet embedded rotor of rotary electric machine and rotary electric machine |
| JP6320860B2 (en) * | 2014-07-04 | 2018-05-09 | 株式会社三井ハイテック | Rotor laminated iron core and manufacturing method thereof |
| JP2016073056A (en) * | 2014-09-29 | 2016-05-09 | トヨタ自動車株式会社 | Manufacturing method of rotor |
| JP6079751B2 (en) * | 2014-11-17 | 2017-02-15 | トヨタ自動車株式会社 | Rotor manufacturing method |
| JP6668984B2 (en) * | 2016-07-07 | 2020-03-18 | トヨタ自動車株式会社 | Rotating electric machine rotor |
| WO2018016067A1 (en) * | 2016-07-22 | 2018-01-25 | 三菱電機株式会社 | Electric motor, air conditioner, rotor, and method of manufacturing electric motor |
| JP6901371B2 (en) * | 2017-10-03 | 2021-07-14 | トヨタ自動車株式会社 | Rotating machine rotor |
| JP7268325B2 (en) * | 2018-10-30 | 2023-05-08 | 株式会社デンソー | Rotor and rotor manufacturing method |
| DE102019124185A1 (en) * | 2019-09-10 | 2021-03-11 | Schaeffler Technologies AG & Co. KG | Electric motor, rotor and method for fixing magnets in a rotor |
| CN117941223A (en) * | 2021-09-09 | 2024-04-26 | 松下知识产权经营株式会社 | Rotor, motor, and method for manufacturing rotor |
| JP7217791B1 (en) | 2021-10-19 | 2023-02-03 | 三菱電機株式会社 | Rotating electric machine |
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| JP2011172441A (en) * | 2010-02-22 | 2011-09-01 | Toyota Boshoku Corp | Motor core and assembling method thereof |
| JP5566314B2 (en) * | 2011-02-10 | 2014-08-06 | 株式会社三井ハイテック | Rotor laminated iron core |
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