JP6828651B2 - Laminated core - Google Patents
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- JP6828651B2 JP6828651B2 JP2017194759A JP2017194759A JP6828651B2 JP 6828651 B2 JP6828651 B2 JP 6828651B2 JP 2017194759 A JP2017194759 A JP 2017194759A JP 2017194759 A JP2017194759 A JP 2017194759A JP 6828651 B2 JP6828651 B2 JP 6828651B2
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Description
本発明は、積層コア、特に鋼板より脆性が高い磁性体が積層されて形成される磁性積層体を備える積層コアに関する。 The present invention relates to a laminated core, particularly a laminated core including a magnetic laminated body formed by laminating magnetic materials having higher brittleness than a steel plate.
従来、モータや変圧器などの電磁機器において、鉄損をより低減するために、電磁鋼板に代えてアモルファス合金板を構成材料とする積層鉄心（積層コア）が種々提案されている。アモルファス合金板の厚さは１０〜３０μｍ程度と電磁鋼板に比べて非常に薄く、脆性が高い。そのため、アモルファス合金板を積層して形成した積層体の両端から電磁鋼板で形成した挟持板で挟み、更に一対の挟持板を積層コアの外径側から保持部材で保持する構成が提案されている（例えば、特許文献１）。 Conventionally, in electromagnetic devices such as motors and transformers, various laminated iron cores (laminated cores) using an amorphous alloy plate as a constituent material instead of the electromagnetic steel sheet have been proposed in order to further reduce iron loss. The thickness of the amorphous alloy plate is about 10 to 30 μm, which is much thinner than the electromagnetic steel plate and has high brittleness. Therefore, a configuration has been proposed in which both ends of a laminate formed by laminating amorphous alloy plates are sandwiched between sandwich plates formed of electrical steel sheets, and a pair of sandwich plates are further held by holding members from the outer diameter side of the laminated core. (For example, Patent Document 1).
特許文献１では、保持部材により積層コアの外径側において積層方向の広がりを抑えているが、ロータ干渉のため内径側に保持部材を配設することができない。そのため、ティース先端（コア内径側）が軸方向に広がってしまい、コア密度、すなわち磁束密度は低下して、トルク性能を悪化させてしまう。 In Patent Document 1, although the holding member suppresses the spread in the stacking direction on the outer diameter side of the laminated core, the holding member cannot be arranged on the inner diameter side due to rotor interference. Therefore, the tip of the tooth (inner diameter side of the core) expands in the axial direction, and the core density, that is, the magnetic flux density decreases, and the torque performance deteriorates.
また、ティースの先端部分が積層方向に広がると、後工程のコイル組付けが難しくなるなどの不具合が予想される。このティースの先端部分の広がりを解消する対策として、挟持板の剛性を上げるために挟持板を厚くすることが考えられるが、そうするとアモルファスの割合が低下するので損失低減効果が低下してしまう。 Further, if the tip portion of the teeth spreads in the stacking direction, problems such as difficulty in assembling the coil in the subsequent process are expected. As a measure to eliminate the spread of the tip portion of the teeth, it is conceivable to increase the thickness of the sandwich plate in order to increase the rigidity of the sandwich plate, but if this is done, the proportion of amorphous material will decrease, and the loss reduction effect will decrease.
本発明は、アモルファスなど鋼板より脆性が高い磁性体が積層されて形成される磁性積層体の内径側に形成されるティースの積層方向の広がりを抑止することを目的とする。 An object of the present invention is to suppress the spread of teeth formed on the inner diameter side of a magnetic laminate formed by laminating magnetic materials having higher brittleness than steel sheets such as amorphous.
本発明に係る積層コアは、鋼板より脆性が高い磁性体が積層されて形成される磁性積層体と、鋼板により形成され、前記磁性積層体と同様の形状を有して前記磁性積層体の両端に積層配置され、そのティース部は前記磁性積層体を積層方向に付勢する形状に変形された一対の挟持板と、により形成される積層コアであって、前記積層コアの円環ヨークに設けられ、前記磁性積層体の積層方向に貫通する貫通孔と、前記貫通孔に挿着され前記一対の挟持板を前記磁性積層体に固定させる固定部材と、を備え、前記一対の挟持板は、この挟持板のティース部位及びティース部位が延出される本体部位を前記積層コアのティースと反対側に山なり（凸形状）に湾曲させて形成し、前記固定部材により前記磁性積層体を挟み込むよう固定された状態で、前記ティース部が前記磁性積層体のティースを積層方向に圧接付勢することを特徴とする。 The laminated core according to the present invention is formed of a magnetic laminate formed by laminating magnetic materials having higher brittleness than a steel plate and a steel plate, and has the same shape as the magnetic laminate and has both ends of the magnetic laminate. The teeth portion is a laminated core formed by a pair of holding plates deformed into a shape that urges the magnetic laminated body in the laminated direction, and is provided on the annular yoke of the laminated core. The pair of holding plates are provided with a through hole penetrating in the laminating direction of the magnetic laminate and a fixing member inserted into the through hole to fix the pair of holding plates to the magnetic laminate. to the body portion teeth portion and the tooth portion of the holding plate is extended is curved mountain becomes (convex) on the opposite side of the teeth of the laminated core formed by pre Symbol fixing member sandwich the magnetic laminate In a fixed state, the teeth portion presses and urges the teeth of the magnetic laminate in the lamination direction.
本発明によれば、磁性体が積層されて形成される磁性積層体の内径側に形成されるティースの、磁性積層体の積層方向への広がりを抑えることができる。 According to the present invention, it is possible to suppress the spread of the teeth formed on the inner diameter side of the magnetic laminate formed by laminating the magnetic laminate in the laminating direction of the magnetic laminate.
以下、図面に基づいて、本発明の好適な実施の形態について説明する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
実施の形態１．
図１は、本発明に係る積層コアが適用されるモータのステータコアの部分平面図である。図２は、本実施の形態におけるステータコアの側面図である。図３は、図１のＡ−Ａ線に沿った側断面図である。本実施の形態においては、３相誘導モータ（以下、「モータ」）のステータ（固定子）を構成するステータコアに、本発明の積層コアを適用している。
Embodiment 1.
FIG. 1 is a partial plan view of a stator core of a motor to which the laminated core according to the present invention is applied. FIG. 2 is a side view of the stator core according to the present embodiment. FIG. 3 is a side sectional view taken along the line AA of FIG. In the present embodiment, the laminated core of the present invention is applied to the stator core constituting the stator (stator) of the three-phase induction motor (hereinafter, “motor”).
モータは、図示しないロータ（回転子）と、ロータとの間に所定の隙間を有しつつロータの外周側に配置されるステータ（固定子）２とを有している。ステータ２は、ステータコア４と、ステータ２の円環状ヨーク４ａから内周側に突出して設けられ、巻線（図示せず）が巻き回されるティース６と、を備える。 The motor has a rotor (rotor) (not shown) and a stator (stator) 2 arranged on the outer peripheral side of the rotor while having a predetermined gap between the rotor and the rotor. The stator 2 includes a stator core 4 and teeth 6 which are provided so as to project from the annular yoke 4a of the stator 2 toward the inner circumference side and around which windings (not shown) are wound.
ステータコア４は、アモルファス合金板５を互いに接触するように複数枚積層して形成される磁性積層体（以下、単に「積層体」という）８と、アモルファス合金板５の積層方向（図２の上下方向）において、積層体８の両端面全体に接触配置される一対の挟持板１０と、一対の挟持板１０を積層体に固定させる固定部材としてのリベット１２と、を備える。 The stator core 4 is formed by laminating a plurality of amorphous alloy plates 5 so as to be in contact with each other (hereinafter, simply referred to as “laminates”) 8 and the laminating direction of the amorphous alloy plates 5 (upper and lower in FIG. 2). In the direction), a pair of holding plates 10 which are contact-arranged on the entire end surfaces of the laminated body 8 and a rivet 12 as a fixing member for fixing the pair of holding plates 10 to the laminated body are provided.
積層体８を構成するアモルファス合金板５は、公知のアモルファス合金薄帯を所定形状に加工して形成される。このようなアモルファス合金板５は、その厚さが１０〜３０μｍ程度と非常に薄く、積層コアの構成材料として一般的な電磁鋼板に比べて脆性が高い。 The amorphous alloy plate 5 constituting the laminated body 8 is formed by processing a known amorphous alloy strip into a predetermined shape. Such an amorphous alloy plate 5 has a very thin thickness of about 10 to 30 μm, and is more brittle than a general electromagnetic steel sheet as a constituent material of a laminated core.
挟持板１０は、前述したように積層体８の両端面に接触するよう配置され、平面的にはアモルファス合金板５とほぼ同様の形状に加工して形成されることで積層体８の両端面全体を保護する。また、積層体８の積層方向（両端面側）への広がりを抑える。本実施の形態における挟持板１０は、アモルファス合金板５より脆性が低い電磁鋼板で形成される。挟持板１０の厚さは、特に限定する必要はないが、ステータコア４の全体積中に占めるアモルファス合金板５の割合（占積率）を高め、鉄損をより低減させるためには薄い方が好ましい。ただ、その一方で、積層体８の積層方向への広がりを抑え、積層体８の両端面を保護する強度を確保する必要がある。従って、本実施の形態では電磁鋼板の積層厚は５ｍｍ〜１０ｍｍ程度の厚さとする。 As described above, the sandwiching plate 10 is arranged so as to come into contact with both end faces of the laminate 8, and is formed by processing the sandwich plate 10 into a shape substantially similar to that of the amorphous alloy plate 5 in terms of planes. Protect the whole. Further, the spread of the laminated body 8 in the laminating direction (both end faces side) is suppressed. The holding plate 10 in the present embodiment is formed of an electromagnetic steel plate having a lower brittleness than the amorphous alloy plate 5. The thickness of the sandwiching plate 10 is not particularly limited, but a thinner one is used in order to increase the ratio (space factor) of the amorphous alloy plate 5 to the total product of the stator core 4 and further reduce the iron loss. preferable. However, on the other hand, it is necessary to suppress the spread of the laminated body 8 in the laminating direction and secure the strength to protect both end faces of the laminated body 8. Therefore, in the present embodiment, the laminated thickness of the electromagnetic steel sheet is about 5 mm to 10 mm.
本実施の形態における挟持板１０は、ステータコア４の外径（外周）部分に対応する本体部位、すなわち円環状ヨーク４ａと円環状ヨーク４ａから各ティース６に延出するティース部位とで構成され、プレス加工時にティース部位を本体部位から積層体８の方向に折り曲げることで付勢力を持ったばね状に形成する。この挟持板１０の構造の詳細については、追って説明する。 The holding plate 10 in the present embodiment is composed of a main body portion corresponding to an outer diameter (outer circumference) portion of the stator core 4, that is, an annular yoke 4a and a teeth portion extending from the annular yoke 4a to each tooth 6. At the time of pressing, the tooth portion is bent from the main body portion in the direction of the laminated body 8 to form a spring shape having an urging force. The details of the structure of the holding plate 10 will be described later.
図３に示すように、積層体８及び挟持板１０には、積層体８の積層方向に貫通する貫通孔１４が形成されている。そして、貫通孔１４には、一対のリベット１２の胴部１２ａが挿入される。 As shown in FIG. 3, the laminated body 8 and the holding plate 10 are formed with through holes 14 penetrating in the laminating direction of the laminated body 8. Then, the body portion 12a of the pair of rivets 12 is inserted into the through hole 14.
リベット１２は、ステータコア４の内径側に形成される各ティース６の外径側、すなわち円環状ヨーク４ａに配設された貫通孔に挿通され、一対の挟持板１０を積層体８に固定させる固定部材である。一方の挟持板１０側のリベット１２は、対向する挟持板１０側のリベット１２とかしめられ結合される。なお、リベット１２を用いて挟持板１０を積層体８に固定させる方法の詳細については追って説明する。 The rivet 12 is inserted into the outer diameter side of each tooth 6 formed on the inner diameter side of the stator core 4, that is, through the through hole arranged in the annular yoke 4a, and fixes the pair of holding plates 10 to the laminated body 8. It is a member. The rivet 12 on the one holding plate 10 side is crimped and coupled with the rivet 12 on the opposite holding plate 10 side. The details of the method of fixing the holding plate 10 to the laminated body 8 by using the rivet 12 will be described later.
前述したように、挟持板１０の厚さは薄い方が好ましいため、それ自体の剛性が低い。従って、ステータコア４のティース６に接触配置される挟持板１０では、ティース６の先端部分の広がりを抑えることができないおそれが生じてくる。 As described above, the thickness of the holding plate 10 is preferably thin, so that the rigidity of the holding plate 10 itself is low. Therefore, in the holding plate 10 which is arranged in contact with the teeth 6 of the stator core 4, there is a possibility that the spread of the tip portion of the teeth 6 cannot be suppressed.
本実施の形態において特徴的なことは、リベット１２で積層体に固定されると、ステータ２のティース６を積層体８の積層方向に付勢する挟持板１０を設けることで、ティース６の先端部分の広がりを抑えることができるようにしたことである。 What is characteristic of this embodiment is that when the teeth 6 of the stator 2 are fixed to the laminated body by the rivets 12, the tip of the teeth 6 is provided with a holding plate 10 that urges the teeth 6 of the stator 2 in the laminating direction of the laminated body 8. It is possible to suppress the spread of the part.
図４は、図１のＡ−Ａ線に沿った側断面図であり、リベット１２をかしめることで挟持板１０を積層体８に固定する前の状態を示す図である。これに対し、図３は、挟持板１０を積層体８に固定した後の状態を示す図となる。以下、図３，４を用いて本実施の形態における挟持板１０の構造及び挟持板１０を積層体８に取り付ける方法について説明する。なお、ここでは、説明の便宜上、積層体８の両端とも同じ構成を有しているものとして説明する。 FIG. 4 is a side sectional view taken along the line AA of FIG. 1 and is a view showing a state before fixing the holding plate 10 to the laminated body 8 by crimping the rivet 12. On the other hand, FIG. 3 is a diagram showing a state after the holding plate 10 is fixed to the laminated body 8. Hereinafter, the structure of the holding plate 10 and the method of attaching the holding plate 10 to the laminated body 8 in the present embodiment will be described with reference to FIGS. 3 and 4. Here, for convenience of explanation, both ends of the laminated body 8 will be described as having the same configuration.
図４に示すように、挟持板１０は、ステータコア４（積層体８）の外径（外周）部分８ａに対応する円環状ヨーク形状の本体部位１０ａと、本体部位１０ａからステータコア４の内径側に位置する各ティース６に延出するティース部位１０ｂとで構成される。ティース部位１０ｂは、本体部位１０ａから積層体８側に折り曲げ変形されている。図４に示すように、リベット１２がかしめられる前では、ティース部位１０ｂの先端部分は、ティース６に当接するものの、本体部位１０ａは、積層体８に当接しない。 As shown in FIG. 4, the holding plate 10 has an annular yoke-shaped main body portion 10a corresponding to the outer diameter (outer circumference) portion 8a of the stator core 4 (laminated body 8), and from the main body portion 10a to the inner diameter side of the stator core 4. It is composed of a tooth portion 10b extending to each of the located teeth 6. The tooth portion 10b is bent and deformed from the main body portion 10a toward the laminated body 8. As shown in FIG. 4, before the rivet 12 is crimped, the tip portion of the tooth portion 10b abuts on the teeth 6, but the main body portion 10a does not abut on the laminate 8.
この状態において、リベット１２の頭部１２ｂを打ち込みかしめる。これにより、各リベット１２の胴部１２ａがかしめられ結合すると、図３に示す状態になる。すなわち、一対の挟持板１０は、リベット１２により積層体８を挟み込むようにして積層体８に固定されることになる。積層体８に当接していなかった本体部位１０ａは、積層体に当接し、これにより、一対の挟持板１０の本体部位１０ａによって積層体８の外径部分が固定される。また、かしめる前からティース６に当接していたティース部位１０ｂは、ばねの力によりティース６を付勢する力が増大することになる。これにより、一対の挟持板１０のティース部位１０ｂは、ティース６の押さえ板の役割を果たし、ティース６を固定する。換言すると、ティース６は、挟持板１０を形成する電磁鋼板の弾性力が付勢力となり、この付勢力によって両側から挟まれ押さえ付けられることになる。 In this state, the head portion 12b of the rivet 12 is driven in. As a result, when the body portion 12a of each rivet 12 is crimped and joined, the state shown in FIG. 3 is obtained. That is, the pair of holding plates 10 are fixed to the laminated body 8 so as to sandwich the laminated body 8 by the rivets 12. The main body portion 10a that has not been in contact with the laminated body 8 is in contact with the laminated body, whereby the outer diameter portion of the laminated body 8 is fixed by the main body portion 10a of the pair of holding plates 10. Further, the force for urging the teeth 6 is increased by the force of the spring at the teeth portion 10b that has been in contact with the teeth 6 before caulking. As a result, the teeth portion 10b of the pair of holding plates 10 serves as a holding plate for the teeth 6 and fixes the teeth 6. In other words, the teeth 6 is pressed by being sandwiched from both sides by the elastic force of the electromagnetic steel plate forming the holding plate 10 as an urging force.
以上説明したように、本実施の形態によれば、ばね状に形成された挟持板１０と挟持板１０を積層体８に固定するリベット１２によって、ティース６の先端部分の積層方向への広がりを確実に抑えることができる。 As described above, according to the present embodiment, the spring-shaped holding plate 10 and the rivet 12 for fixing the holding plate 10 to the laminated body 8 spread the tip portion of the teeth 6 in the stacking direction. It can be surely suppressed.
ところで、本実施の形態では、一対のリベット１２の胴部１２ａを結合することで挟持板１０を積層体８に固定するようにした。また、本実施の形態では、丸リベットを使うことを想定して説明した。しかし、挟持板１０を積層体８に固定する固定部材は、この例に限るものではない。例えば、皿リベットなど丸リベットとは異なる種類のリベットを用いてもよい。また、一対のリベット１２を用いずにブラインドリベットなど１つの固定部材を用いて固定するようにしてもよい。また、リベット以外の部材を用いてもよい。 By the way, in the present embodiment, the holding plate 10 is fixed to the laminated body 8 by connecting the body portions 12a of the pair of rivets 12. Further, in the present embodiment, the description has been made on the assumption that a round rivet is used. However, the fixing member for fixing the holding plate 10 to the laminated body 8 is not limited to this example. For example, a type of rivet different from the round rivet such as a dish rivet may be used. Further, instead of using the pair of rivets 12, it may be fixed by using one fixing member such as a blind rivet. Moreover, you may use a member other than a rivet.
実施の形態２．
図５は、本実施の形態において、ステータコア４における１つのティース６部分の構造を示す概略的な斜視図である。実施の形態１では、挟持板１０を、本体部位１０ａからティース部位１０ｂを折り曲げたばね形状で形成したが、本実施の形態においては、図５に示すように、挟持板１０のティース部位１０ｂ及びティース部位１０ｂが延出される本体部位１０ａを山なり（凸形状）に湾曲させて形成する。
Embodiment 2.
FIG. 5 is a schematic perspective view showing the structure of one tooth 6 portion in the stator core 4 in the present embodiment. In the first embodiment, the holding plate 10 is formed in a spring shape in which the teeth portion 10b is bent from the main body portion 10a, but in the present embodiment, as shown in FIG. 5, the teeth portion 10b and the teeth of the holding plate 10 are formed. The main body portion 10a on which the portion 10b extends is curved in a mountainous shape (convex shape).
このように形成された挟持板１０を、上記の通りリベット１２をかしめて結合すると、湾曲したティース部位１０ｂは、結合前に比べて平坦な状態になる。これにより、ティース部位１０ｂが元の形状に戻ろうとする復元力が付勢力となって、ティース６の積層方向への広がりを抑止する。より詳細には、ティース６と接触するティース部位１０ｂの側端の下辺に対応するティース６の表面を押さえ付けるようになる。 When the holding plate 10 thus formed is joined by crimping the rivet 12 as described above, the curved tooth portion 10b becomes flat as compared with that before joining. As a result, the restoring force that causes the tooth portion 10b to return to its original shape becomes an urging force, and the spread of the teeth 6 in the stacking direction is suppressed. More specifically, the surface of the teeth 6 corresponding to the lower side of the side end of the teeth portion 10b in contact with the teeth 6 is pressed.
本実施の形態によれば、以上のように構成することでティース６の積層方向への広がりを確実に抑止することができる。 According to the present embodiment, the spread of the teeth 6 in the stacking direction can be surely suppressed by the above configuration.
本実施の形態では、ティース６の積層方向への広がりを抑止する構造を２つの実施の形態において説明したが、それぞれの実施の形態にて説明した構造を組み合わせて適用してもよい。 In the present embodiment, the structure for suppressing the spread of the teeth 6 in the stacking direction has been described in the two embodiments, but the structures described in the respective embodiments may be combined and applied.
また、本実施の形態では、本発明の構成をステータコア４に適用した場合を例にして説明したが、磁性積層体を備える積層コアであれば、ステータコア４以外の積層コアにも適用可能である。 Further, in the present embodiment, the case where the configuration of the present invention is applied to the stator core 4 has been described as an example, but any laminated core provided with a magnetic laminate can be applied to a laminated core other than the stator core 4. ..
２ ステータ、４ ステータコア、４ａ 円環状ヨーク、５ アモルファス合金板、６ ティース、８ 積層体、８ａ 外径部分、１０ 挟持板、１０ａ 本体部位、１０ｂ ティース部位、１２ リベット、１２ａ 胴部、１２ｂ 頭部、１４ 貫通孔。
2 stator, 4 stator core, 4a annular yoke, 5 amorphous alloy plate, 6 teeth, 8 laminated body, 8a outer diameter part, 10 holding plate, 10a main body part, 10b teeth part, 12 rivets, 12a body, 12b head , 14 Through holes.
Claims (1)
鋼板により形成され、前記磁性積層体と同様の形状を有して前記磁性積層体の両端に積層配置され、そのティース部は前記磁性積層体を積層方向に付勢する形状に変形された一対の挟持板と、
により形成される積層コアであって、
前記積層コアの円環ヨークに設けられ、前記磁性積層体の積層方向に貫通する貫通孔と、
前記貫通孔に挿着され前記一対の挟持板を前記磁性積層体に固定させる固定部材と、
を備え、
前記一対の挟持板は、
この挟持板のティース部位及びティース部位が延出される本体部位を前記積層コアのティースと反対側に山なり（凸形状）に湾曲させて形成し、
前記固定部材により前記磁性積層体を挟み込むよう固定された状態で、前記ティース部が前記磁性積層体のティースを積層方向に圧接付勢することを特徴とする積層コア。 A magnetic laminate formed by laminating magnetic materials that are more brittle than steel sheets,
A pair of steel plates, which have the same shape as the magnetic laminate and are laminated and arranged at both ends of the magnetic laminate, and the teeth portion thereof is deformed into a shape that urges the magnetic laminate in the lamination direction. With a holding plate,
It is a laminated core formed by
A through hole provided in the annular yoke of the laminated core and penetrating in the laminating direction of the magnetic laminated body,
A fixing member that is inserted into the through hole and fixes the pair of holding plates to the magnetic laminate.
With
The pair of holding plates,
The teeth portion of the holding plate and the main body portion where the teeth portion extends are formed by being curved in a mountain shape (convex shape) on the opposite side of the laminated core to the teeth.
Wherein in a state of being fixed so as to sandwich the magnetic multilayer structure, laminated core, wherein the teeth are pressed against urging the stacking direction teeth of the magnetic multilayer structure by pre-Symbol fixing member.
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