JP2013066305A - Outer rotor rotary electric machine and method for manufacturing the same - Google Patents

Outer rotor rotary electric machine and method for manufacturing the same Download PDF

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JP2013066305A
JP2013066305A JP2011203512A JP2011203512A JP2013066305A JP 2013066305 A JP2013066305 A JP 2013066305A JP 2011203512 A JP2011203512 A JP 2011203512A JP 2011203512 A JP2011203512 A JP 2011203512A JP 2013066305 A JP2013066305 A JP 2013066305A
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stator core
fixing member
outer rotor
rotor type
rotating electrical
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Hideo Hirose
英男 廣瀬
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Fuji Electric Co Ltd
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Fuji Electric Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive outer rotor rotary electric machine that applies tensile stress precisely to a stator core (stator) to achieve the effect of reducing core loss, and to provide a method for manufacturing the same.SOLUTION: An outer rotor rotary electric machine includes: a stator core that is formed by laminating magnetic steel sheets; a fixing member on which the stator core is mounted; and a rotor that is arranged concentrically on an outer side of the stator core with a predetermined air gap therebetween. Tensile stress is applied to the magnetic steel sheets that form the stator core, in a state in which the stator core is mounted on the fixing member.

Description

本発明は、固定子とその外側で回転する回転子を備えたいわゆるアウターローター型回転電機に関し、特にその固定子の鉄損を低減するアウターローター型回転電機およびその製造方法に関する。   The present invention relates to a so-called outer rotor type rotating electrical machine including a stator and a rotor that rotates on the outside thereof, and more particularly to an outer rotor type rotating electrical machine that reduces iron loss of the stator and a manufacturing method thereof.

回転電機は、電気エネルギーを回転力に変換し、あるいは回転力を電気エネルギーに変換するものであるが、近年、エネルギーの効率利用の観点からこの変換効率を効果的に向上させることが望まれている。ここで、このような回転電機の効率は各種の要因に影響されるが、その固定子で発生する損失である鉄損は比較的大きな割合を占める。そして、この固定子で発生する鉄損を低減させるため、固定子に使用する材料に鉄損のより少ない特殊な電磁鋼板を用いるのが一般的であった。例えば、JISC2555で規定される鉄芯用の50A1000の電磁鋼板に替えて、50A400等の50A1000より鉄損の少ない電磁鋼板を用いることにより回転機自身の鉄損を低減することができる。しかし、鉄損の少ない電磁鋼板は一般に価格が高く、これを使用する回転機の価格が高くなる問題があった。 Rotating electrical machines convert electrical energy into rotational force, or convert rotational force into electrical energy. In recent years, it has been desired to effectively improve the conversion efficiency from the viewpoint of efficient use of energy. Yes. Here, although the efficiency of such a rotating electrical machine is influenced by various factors, iron loss, which is a loss generated in the stator, occupies a relatively large proportion. And in order to reduce the iron loss which generate | occur | produces in this stator, it was common to use the special electromagnetic steel plate with less iron loss for the material used for a stator. For example, the iron loss of the rotating machine itself can be reduced by using an electromagnetic steel sheet having a lower iron loss than 50A1000, such as 50A400, instead of the 50A1000 electromagnetic steel sheet for iron core specified by JISC2555. However, there is a problem that the electrical steel sheet with low iron loss is generally expensive and the price of the rotating machine using the steel sheet is high.

ところで、電磁鋼板に圧縮応力が働くと鉄損が増加するが、反対に引張応力が働くと鉄損が低減することが非特許文献1等により知られている。そして、この電磁鋼板の特性を利用するものとして、例えば特許文献1には、ステータコア(固定子)のヨーク部の外周部と内周部との温度差が10〜300℃となるようにヨーク部の外周部または内周部を加熱した後に冷却することにより、磁束の通る方向に所定の引張応力を付与して優れた磁気特性が得られるようにしたステータコアおよびその製造方法が開示されている。これによれば、高価な特殊電磁鋼板を用いないで固定子の鉄損を低減することができる。
また、特許文献2には、従来のアウターローター型回転電機である磁石発電機の構造が開示されている。この特許文献2に記載される発電機は、ステータコアが電磁鋼板を積層して構成され、このステータコアが、その電磁鋼板の積層方向に圧縮されるようにボルトで締め付けられて、エンジンステー(取付部材)に取り付けられている。このため、このステータコアを構成する電磁鋼板には、ボルトの締め付けによる圧縮力が働いている。
By the way, it is known from Non-Patent Document 1 and the like that iron loss increases when compressive stress is applied to an electromagnetic steel sheet, but iron loss is reduced when tensile stress is applied. And as what utilizes the characteristic of this electromagnetic steel plate, for example, in Patent Document 1, the yoke portion is set so that the temperature difference between the outer peripheral portion and the inner peripheral portion of the yoke portion of the stator core (stator) becomes 10 to 300 ° C. A stator core and a method for manufacturing the stator core are disclosed in which a predetermined tensile stress is applied in the direction in which the magnetic flux passes by heating the outer peripheral portion or the inner peripheral portion of the magnetic core and then cooling it. According to this, the iron loss of the stator can be reduced without using an expensive special electromagnetic steel sheet.
Patent Document 2 discloses a structure of a magnet generator which is a conventional outer rotor type rotating electrical machine. In the generator described in Patent Document 2, a stator core is formed by laminating electromagnetic steel plates, and the stator core is tightened with bolts so as to be compressed in the laminating direction of the electromagnetic steel plates. ). For this reason, the compressive force by bolting is acting on the electromagnetic steel plate which comprises this stator core.

新日鉄技報第378号2003 53頁、図10Nippon Steel Technical Report No. 378, 2003, p. 53, FIG. 特開2003−319618号公報JP 2003-319618 A 特開2010−22089号公報JP 2010-22089 A

ところで、特許文献1に記載されたステータコアの製造方法においては、電磁鋼板を積層して成るステータコアを熱処理することで、その磁気特性を改善するものであるが、例えば、そのヨーク部の外周部または内周部を加熱する際に、それらの加熱状態にばらつきが生じると、それを構成する電磁鋼板に与えられる引張応力にばらつきが生じ、これに起因して磁気特性の改善特性が損なわれる場合が生じる虞があった。また、ステータコアの両端部に位置する電磁鋼板に反りが生じやすく、そのひずみによりステータコアの磁気特性が悪化することがあるという問題があった。すなわち、その引張応力の発生にばらつきが生じやすく磁気特性が安定し難い問題があった。
また、特許文献2に記載されたステータコアの取り付け方法においては、それを構成する電磁鋼板に圧縮応力が生じることにより、鉄損が増加する虞があった。
By the way, in the stator core manufacturing method described in Patent Document 1, the magnetic properties are improved by heat-treating the stator core formed by laminating electromagnetic steel sheets. For example, the outer peripheral portion of the yoke portion or When heating the inner peripheral portion, if the heating state varies, the tensile stress applied to the electromagnetic steel sheet constituting it will vary, which may impair the improvement of magnetic properties. There was a risk of it occurring. Further, there is a problem that the magnetic steel sheets located at both ends of the stator core are likely to warp, and the magnetic characteristics of the stator core may be deteriorated due to the distortion. That is, there is a problem that the generation of the tensile stress tends to vary and the magnetic characteristics are difficult to stabilize.
Moreover, in the attachment method of the stator core described in patent document 2, there existed a possibility that an iron loss might increase, when a compressive stress arises in the electromagnetic steel plate which comprises it.

本発明は、このような問題に対応するため、複数枚の電磁鋼板が積層されてなる固定子に的確に引張応力が付与されるようにして、安価で鉄損の低減効果を得ることができるアウターローター型回転電機、およびその製造方法を提供することを目的とするものである。   In order to cope with such a problem, the present invention can obtain an effect of reducing iron loss at low cost by accurately applying a tensile stress to a stator in which a plurality of electromagnetic steel sheets are laminated. An object of the present invention is to provide an outer rotor type rotating electrical machine and a method for manufacturing the same.

上記課題を解決するため、請求項1に係る発明は、電磁鋼板を積層して構成されたステータコアと、前記ステータコアを取り付ける固定部材と、前記ステータコアと所定の空隙をもってその外側に同心的に配置されたローターと、を備えたアウターローター型回転電機において、前記ステータコアを前記固定部材に取り付けた状態において、前記ステータコアを構成する電磁鋼板に引張力を付与するものである。
これによれば、前記ステータコアを構成する電磁鋼鈑を引っ張ることで、前記電磁鋼板に引張応力を生じさせることができる。
In order to solve the above-mentioned problems, the invention according to claim 1 is concentrically disposed outside the stator core formed by laminating electromagnetic steel sheets, a fixing member to which the stator core is attached, the stator core and a predetermined gap. In the outer rotor type rotating electrical machine provided with the rotor, a tensile force is applied to the electromagnetic steel sheet constituting the stator core in a state where the stator core is attached to the fixing member.
According to this, a tensile stress can be generated in the electromagnetic steel sheet by pulling the electromagnetic steel sheet constituting the stator core.

また、請求項2に係る発明は、請求項1に記載のアウターローター型回転電機において、前記固定部材は前記ステータコアに挿通される取付部を有し、前記ステータコアは前記取付部を挿通する取付穴を有し、前記ステータコアの取付穴に前記固定部材の取付部を挿通して前記ステータコアを前記固定部材に取り付けるものであって、前記ステータコアの取付穴の内周部と前記固定部材の取付部の外周部の間に隙間を設け、前記隙間に接着剤を塗布して前記ステータコアを前記固定部材に接着して固定するものである。
これによれば、前記隙間に塗布した接着剤が硬化するとともに縮むから、前記ステータコアの取付穴の内周部をその内側に向けて引っ張ることができる。
また、請求項3に係る発明は、請求項2に記載のアウターローター型回転電機において、前記ステータコアを前記固定部材に取り付けるとき、前記ステータコアの取付穴の内周部と前記固定部材の取付部の外周部の対向位置における前記ステータコアの取付穴の内径寸法と前記固定部材の取付部の外径寸法との差を0.1mm以上とするものである。
これによれば、前記ステータコアの取付穴の内周部と前記固定部材の取付部の外周部との間に適宜な隙間を設け、その隙間に接着剤を隙間なく塗布することができる。すなわち、これにより前記ステータコアの取付穴の内周をばらつき無く内側に引っ張ることができる。
According to a second aspect of the present invention, in the outer rotor type rotating electric machine according to the first aspect, the fixing member has a mounting portion inserted through the stator core, and the stator core is a mounting hole through which the mounting portion is inserted. And mounting the stator core to the fixing member by inserting the mounting portion of the fixing member through the mounting hole of the stator core, the inner periphery of the mounting hole of the stator core and the mounting portion of the fixing member A gap is provided between the outer peripheral portions, an adhesive is applied to the gap, and the stator core is bonded and fixed to the fixing member.
According to this, since the adhesive applied to the gap hardens and shrinks, the inner peripheral portion of the mounting hole of the stator core can be pulled toward the inside.
According to a third aspect of the present invention, in the outer rotor type rotating electric machine according to the second aspect, when the stator core is attached to the fixing member, an inner peripheral portion of an attachment hole of the stator core and an attachment portion of the fixing member The difference between the inner diameter dimension of the mounting hole of the stator core and the outer diameter dimension of the mounting portion of the fixing member at a position opposed to the outer peripheral portion is 0.1 mm or more.
According to this, an appropriate gap can be provided between the inner peripheral part of the attachment hole of the stator core and the outer peripheral part of the attachment part of the fixing member, and the adhesive can be applied to the gap without any gap. In other words, this allows the inner circumference of the mounting hole of the stator core to be pulled inwardly without variation.

また、請求項4に係る発明は、請求項2または請求項3に記載のアウターローター型回転電機において、前記固定部材の材質に前記ステータコアより熱膨張率の小さい材料を使用するものである。
これによれば、前記アウターローター型回転電機の運転時の発熱により、前記ステータコアが前記固定部材より大きく膨張して外側に広がるから、前記ステータコアの取付穴の内周を内側に引っ張る力を生じさせることができる。
また、請求項5に係る発明は、請求項2ないし請求項4の何れかに記載のアウターローター型回転電機の製造方法において、前記固定部材に前記ステータコアを取り付けるとき、前記固定部材より前記ステータコアの温度が低くなるように温度差を保持した状態で、前記固定部材に前記ステータコアを接着して固定するものである。
これによれば、製造時に前記固定部材より前記ステータコアの温度が低くなるようにして、前記ステータコアを前記固定部材に取り付けるので、これらの温度が同じになったときに、前記ステータコアに比較して前記固定部材の方が縮む事象が生じる。これにより、結果的に前記ステータコアの取付穴の内周を内側に引っ張る力を生じさせることができる。
According to a fourth aspect of the present invention, in the outer rotor type rotating electric machine according to the second or third aspect, a material having a smaller coefficient of thermal expansion than the stator core is used as the material of the fixing member.
According to this, due to the heat generated during operation of the outer rotor type rotating electrical machine, the stator core expands larger than the fixed member and spreads outward, so that a force that pulls the inner periphery of the mounting hole of the stator core inward is generated. be able to.
According to a fifth aspect of the present invention, in the method for manufacturing an outer rotor type rotating electrical machine according to any one of the second to fourth aspects, when the stator core is attached to the fixed member, the stator core The stator core is bonded and fixed to the fixing member in a state where the temperature difference is maintained so that the temperature is lowered.
According to this, since the stator core is attached to the fixing member so that the temperature of the stator core is lower than that of the fixing member at the time of manufacture, when these temperatures are the same, the stator core is compared with the stator core. An event occurs in which the fixing member contracts. As a result, a force that pulls the inner circumference of the mounting hole of the stator core inward can be generated.

以上説明したように請求項1に係る発明によれば、ステータコアを構成する電磁鋼鈑を引っ張ることで、その電磁鋼板に引張応力を生じさせ、その鉄損を低減することができる。
また、請求項2ないし請求項5の何れかに係る発明によれば、ステータコアの取付穴の内周をその内側に的確に引っ張ることにより、それを構成する電磁鋼板に引張応力を生じさせ、その鉄損を低減することができる。すなわち、これらにより、安価でステータコアに発生する鉄損の低減効果を得ることができるアウターローター型回転電機およびその製造方法を提供することができる。また、このように構成することで、高価な特殊電磁鋼板を用いずに、その鉄損を低減することができるコストの安いアウターローター型回転電機を提供することができる。
As described above, according to the first aspect of the present invention, by pulling the electromagnetic steel sheet constituting the stator core, tensile stress can be generated in the electromagnetic steel sheet, and the iron loss can be reduced.
In addition, according to the invention according to any one of claims 2 to 5, by pulling the inner periphery of the mounting hole of the stator core accurately to the inside thereof, a tensile stress is generated in the electrical steel sheet constituting the inner periphery, Iron loss can be reduced. That is, by these, it is possible to provide an outer rotor type rotating electrical machine that can obtain an effect of reducing iron loss generated in the stator core at a low cost and a method for manufacturing the same. Moreover, by comprising in this way, the cheap outer-rotor type rotary electric machine which can reduce the iron loss can be provided, without using an expensive special electromagnetic steel plate.

本発明を適用する実施形態に係るアウターローター型回転電機を示す側面断面図である。It is side surface sectional drawing which shows the outer rotor type rotary electric machine which concerns on embodiment to which this invention is applied.

以下、この発明を適用するアウターローター型回転電機の実施の形態について、図面を参照して説明する。図1は、本発明を適用する実施形態に係るアウターローター型回転電機1を示す側面断面図である。図に示すように、このアウターローター型回転電機1は、ステータコア(固定子)5と、ステータコア5の周りを所定の空隙11を介して回転するローター(回転子)8とによって構成される回転電機である。このようなアウターローター型回転電機1は、例えば各種機器の発電機等として用いられる。
このアウターローター型回転電機1は、回転軸10と、その回転軸10の外側にそれと同心的に設けられるステータコア固定部材(固定部材)3と、そのステータコア固定部材3の内方に嵌め込まれ、それに挿通される回転軸10を回転自在に保持する2つの軸受12,13と、回転軸10とステータコア固定部材3の間の隙間を外側から塞ぐように、ステータコア固定部材3の両側にボルト21,22によってそれぞれ装着されるカバー部材15,16等を備えている。また、このステータコア固定部材3は、略円筒状に形成され、その外周の段付部にステータコア5が接着剤19を介して固定される取付部3aが形成されている。なお、このステータコア固定部材3は、例えば各種機器の台座等に取り付けられて、このアウターローター型回転電機1をそれらに取り付け、固定するものである。
Hereinafter, embodiments of an outer rotor type rotating electrical machine to which the present invention is applied will be described with reference to the drawings. FIG. 1 is a side sectional view showing an outer rotor type rotating electrical machine 1 according to an embodiment to which the present invention is applied. As shown in the figure, the outer rotor type rotating electrical machine 1 is composed of a stator core (stator) 5 and a rotor (rotor) 8 that rotates around the stator core 5 via a predetermined gap 11. It is. Such an outer rotor type rotating electrical machine 1 is used, for example, as a generator for various devices.
The outer rotor type rotating electrical machine 1 is fitted into a rotating shaft 10, a stator core fixing member (fixing member) 3 provided concentrically with the rotating shaft 10, and an inner side of the stator core fixing member 3. Bolts 21 and 22 are provided on both sides of the stator core fixing member 3 so as to close the gap between the two bearings 12 and 13 and the rotation shaft 10 and the stator core fixing member 3 from outside. Are provided with cover members 15 and 16, respectively. The stator core fixing member 3 is formed in a substantially cylindrical shape, and a mounting portion 3 a to which the stator core 5 is fixed via an adhesive 19 is formed at a stepped portion on the outer periphery thereof. The stator core fixing member 3 is attached to, for example, a pedestal or the like of various devices, and attaches and fixes the outer rotor type rotating electrical machine 1 to them.

ステータコア5は、電磁鋼板6をステータコア固定部材3の長手方向に積層して形成され、その中央にステータコア固定部材3の取付部3aが挿入される取付穴5aが設けられている。このステータコア5を形成する電磁鋼板6は、その中央にステータコア5の取付穴5aを成す貫通穴6aが設けられ、その貫通穴6aの周囲には(詳細な形状の図示は省くが)円環状のヨーク部6bが設けられ、さらにそのヨーク部6aの回りに放射状に突出する複数のティース部6cが形成されている。そして、その各々のティース部6cが積層される各部位には、コイル7が順次巻装されている。
また、回転軸10の一方端には、ローター8を装着するローターボス9が取り付けられている。このローターボス9は、回転軸10を嵌め込む円筒部9aと、円筒部9aの周囲に円盤状に設けられてローター8を装着するフランジ部9bを備えている。また、円筒部9aには、回転軸10に設けられるキー25が嵌め込まれるキー溝(図示なし)が形成され、キー25によってローターボス9が回転軸10と一体に回転するように構成されている。また、フランジ部9bの周囲には、ローター8を嵌め込んで同心的に装着するための段付部9cと、ローター8をローターボス9に締結する複数のボルト23用のネジ穴9dが設けられている。
The stator core 5 is formed by laminating electromagnetic steel plates 6 in the longitudinal direction of the stator core fixing member 3, and a mounting hole 5a into which the mounting portion 3a of the stator core fixing member 3 is inserted is provided at the center. The electromagnetic steel sheet 6 forming the stator core 5 is provided with a through hole 6a forming a mounting hole 5a of the stator core 5 at the center, and an annular shape is provided around the through hole 6a (although the detailed shape is omitted). A yoke portion 6b is provided, and a plurality of teeth portions 6c projecting radially around the yoke portion 6a are formed. A coil 7 is sequentially wound around each portion where the respective tooth portions 6c are laminated.
Further, a low turbos 9 to which the rotor 8 is attached is attached to one end of the rotating shaft 10. The low turbos 9 includes a cylindrical portion 9 a into which the rotary shaft 10 is fitted, and a flange portion 9 b that is provided in a disk shape around the cylindrical portion 9 a and to which the rotor 8 is attached. The cylindrical portion 9 a is formed with a key groove (not shown) into which a key 25 provided on the rotary shaft 10 is fitted, and the low turbos 9 is configured to rotate integrally with the rotary shaft 10 by the key 25. . Further, around the flange portion 9b, a stepped portion 9c for fitting the rotor 8 into a concentric manner and a screw hole 9d for a plurality of bolts 23 for fastening the rotor 8 to the low turbos 9 are provided. ing.

ローター8は、有底円筒状に形成され、その円筒部8aの内周には複数の磁極が着磁されたマグネット27が、円周方向に等間隔に並べられて固定されている。また、ローター8の底面部8bの中央には、ローターボス9が嵌め込まれる装着穴8cが形成され、その装着穴8cの周囲には、ローター8をローターボス9に締結するボルト23が挿入される締結穴8dが複数箇所に形成されている。
このように構成されるアウターローター型回転電機1において、例えば、回転軸10が回転することにより、その回転軸10とローターボス9を介して一体に回転するローター8がステータコア5の回りを回転し、ステータコア5に巻装されたコイル7に誘導起電力が発生する。そして、コイル7に生じた誘導起電力は、図示しない各種機器のバッテリーや電気機器等に供給される。
The rotor 8 is formed in a bottomed cylindrical shape, and a magnet 27 having a plurality of magnetic poles magnetized on the inner circumference of the cylindrical portion 8a is fixed in a circumferential direction at equal intervals. A mounting hole 8c into which the low turbo 9 is fitted is formed at the center of the bottom surface portion 8b of the rotor 8, and a bolt 23 for fastening the rotor 8 to the low turbo 9 is inserted around the mounting hole 8c. Fastening holes 8d are formed at a plurality of locations.
In the outer rotor type rotating electrical machine 1 configured as described above, for example, when the rotating shaft 10 rotates, the rotor 8 that rotates integrally with the rotating shaft 10 via the low turbos 9 rotates around the stator core 5. An induced electromotive force is generated in the coil 7 wound around the stator core 5. The induced electromotive force generated in the coil 7 is supplied to a battery or an electric device of various devices (not shown).

ところで、このアウターローター型回転電機1はステータコア5の取付穴5a内周とステータコア固定部材3の取付部3a外周の間に隙間17を設け、この隙間17に接着剤19を塗布している。接着剤19は硬化すると体積が縮小するため、この隙間17に塗布された接着剤19が硬化するとステータコア5の取付穴5a内周はその内側に、ステータコア固定歩材3の取付部3a外周は外側に引っ張られる。ここで、このステータコア5は電磁鋼板6をステータコア固定部材3の長手方向に積層して構成されているので、ステータコア5の取付穴5a内周が内側に引っ張られるとそれを構成する電磁鋼板6に引張応力が働く。そして、この電磁鋼板6は引張応力がはたらくと鉄損が低減する特性を有するので、このように構成されるアウターローター型回転電機1は、的確に鉄損を低減することができる。また、このような構成により、特別に高価な特殊電磁鋼板を用いなくてもステータコア5の鉄損を低減することができるから、アウターローター型回転電機1のコストを安くすることができる。   By the way, in the outer rotor type rotating electrical machine 1, a gap 17 is provided between the inner periphery of the mounting hole 5 a of the stator core 5 and the outer periphery of the mounting portion 3 a of the stator core fixing member 3, and the adhesive 19 is applied to the gap 17. Since the volume of the adhesive 19 is reduced when the adhesive 19 is cured, when the adhesive 19 applied to the gap 17 is cured, the inner periphery of the attachment hole 5a of the stator core 5 is inward, and the outer periphery of the attachment portion 3a of the stator core fixing pedestal 3 is outward. Pulled on. Here, since the stator core 5 is configured by laminating electromagnetic steel plates 6 in the longitudinal direction of the stator core fixing member 3, when the inner periphery of the mounting hole 5a of the stator core 5 is pulled inward, the electromagnetic steel plates 6 constituting the stator core 5 are formed. Tensile stress works. And since this electromagnetic steel plate 6 has the characteristic that an iron loss reduces when tensile stress acts, the outer rotor type rotary electric machine 1 comprised in this way can reduce an iron loss exactly. Further, with such a configuration, the iron loss of the stator core 5 can be reduced without using a special expensive special electromagnetic steel sheet, so that the cost of the outer rotor type rotating electrical machine 1 can be reduced.

さらに、ステータコア5をステータコア固定部材3に装着する場合において、ステータコア5の取付穴5aの内径寸法とステータコア固定部材3の取付部3aの外径寸法の径方向の対向位置における寸法差を0.1mm以上とすることにより、ステータコア5の取付穴5aの内周とステータコア固定部材3の取付部3a外周の間に適宜な隙間17を形成し、その隙間17に接着剤19を隙間なく確実に塗布することができる。これにより、ステータコア5の取付穴5a内周に生じる引張応力のばらつきを少なくして的確に鉄損を低減することができる回転電機1を提供することができる。なお、ステータコア5の取付穴5aの内周とステータコア固定部材3の取付部3a外周の隙間17に接着剤19が確実に塗布されないと、周方向に接着剤19のある場所と無い場所が生じ、また接着剤19のある場所と無い場所の比率が製品(個体)毎に異なる状況が生じるため、ステータコア5の取付穴5a内周部に生じる引張応力が製品毎にばらつきを生じてしまう。そのため、回転電機1の鉄損そのものは低減するが、その特性が製品毎にばらつく問題が生じる。
また、本発明を適用する実施形態に係るアウターローター型回転電機1において、ステータコア固定部材3の材質にステータコア5より熱膨張率の小さい材料を用いることが望ましい。これによれば、アウターローター型回転電機1の運転時の発熱により、ステータコア5がステータコア固定部材3より大きく膨張して外側に広がるから、これによりステータコア5の取付穴5a内周を内側に引っ張る力が生じ、ステータコア5を構成する電磁鋼板6に引張応力を付与しその鉄損を的確に低減することができる。
Further, when the stator core 5 is mounted on the stator core fixing member 3, the dimensional difference between the inner diameter dimension of the mounting hole 5a of the stator core 5 and the outer diameter dimension of the mounting portion 3a of the stator core fixing member 3 is 0.1 mm. Thus, an appropriate gap 17 is formed between the inner circumference of the mounting hole 5a of the stator core 5 and the outer circumference of the mounting portion 3a of the stator core fixing member 3, and the adhesive 19 is reliably applied to the gap 17 without any gap. be able to. Thereby, the rotary electric machine 1 which can reduce the iron loss accurately by reducing the dispersion | variation in the tensile stress produced in the attachment hole 5a inner periphery of the stator core 5 can be provided. If the adhesive 19 is not reliably applied to the gap 17 between the inner periphery of the mounting hole 5a of the stator core 5 and the outer periphery of the mounting portion 3a of the stator core fixing member 3, there are places where the adhesive 19 is present and where there is no adhesive 19 in the circumferential direction. Further, since the ratio of the place where the adhesive 19 is present and the place where the adhesive 19 is not present varies depending on the product (individual), the tensile stress generated in the inner peripheral portion of the mounting hole 5a of the stator core 5 varies from product to product. Therefore, although the iron loss itself of the rotating electrical machine 1 is reduced, there arises a problem that the characteristics vary from product to product.
In the outer rotor type rotating electrical machine 1 according to the embodiment to which the present invention is applied, it is desirable to use a material having a smaller coefficient of thermal expansion than the stator core 5 as the material of the stator core fixing member 3. According to this, the stator core 5 expands larger than the stator core fixing member 3 and spreads outward due to heat generated during the operation of the outer rotor type rotating electrical machine 1, thereby pulling the inner periphery of the mounting hole 5 a of the stator core 5 inward. As a result, a tensile stress can be applied to the electromagnetic steel sheet 6 constituting the stator core 5 and the iron loss can be accurately reduced.

また、本発明を適用する実施形態に係るアウターローター型回転電機1の製造方法において、ステータコア固定部材3よりステータコア5の温度が低くなるように温度差を保持した状態で、ステータコア固定部材3にステータコア5を接着して固定することが望ましい。これによれば、製造時にステータコア固定部材3よりステータコア5の温度が低くなるようにしてこれらを組み付けるので、これらの温度が同じになったときに、ステータコア5に比較してステータコア固定部材3の方が縮む事象が生じる。これにより、結果的にステータコア5の取付穴5a内周を内側に引っ張る力が生じるから、ステータコア5を構成する電磁鋼板6の鉄損を的確に低減することができる。
また、本発明を適用する実施形態に係るアウターローター型回転電機1は、このような構成により高価な特殊電磁鋼板を用いずにその鉄損を低減することができるから、コストの安いアウターローター型回転電機1を提供することができる。
以上のように、本発明を適用する実施形態に係るアウターローター型回転電機1およびその製造方法によれば、ステータコア5の取付穴5a内周をその内側に的確に引っ張ることにより、それを構成する電磁鋼板6に引張応力を生じさせ、その鉄損を低減することができるから、安価でステータコア5に発生する鉄損の低減効果を得ることができるアウターローター型回転電機1およびその製造方法を提供することができる。
In the method of manufacturing the outer rotor type rotating electrical machine 1 according to the embodiment to which the present invention is applied, the stator core is fixed to the stator core fixing member 3 in a state where the temperature difference is maintained so that the temperature of the stator core 5 is lower than the stator core fixing member 3. It is desirable to adhere and fix 5. According to this, since the stator core 5 is assembled so that the temperature of the stator core 5 is lower than that of the stator core fixing member 3 at the time of manufacture, the stator core fixing member 3 is compared with the stator core 5 when these temperatures are the same. Occurs. As a result, a force that pulls the inner periphery of the mounting hole 5a of the stator core 5 inward is generated, so that the iron loss of the electromagnetic steel sheet 6 constituting the stator core 5 can be reduced accurately.
In addition, the outer rotor type rotating electrical machine 1 according to the embodiment to which the present invention is applied can reduce the iron loss without using an expensive special electromagnetic steel sheet with such a configuration, so that the outer rotor type with a low cost can be obtained. The rotating electrical machine 1 can be provided.
As described above, according to the outer rotor type rotating electrical machine 1 and the method for manufacturing the same according to the embodiment to which the present invention is applied, the inner periphery of the mounting hole 5a of the stator core 5 is accurately pulled to the inside thereof, thereby configuring it. An outer rotor type rotating electrical machine 1 capable of obtaining an effect of reducing iron loss generated in the stator core 5 at low cost and a method for manufacturing the same are provided because tensile stress can be generated in the electromagnetic steel sheet 6 and the iron loss can be reduced. can do.

なお、本発明は、言うまでもなく本実施の形態に示す回転電機1にのみ限定されず、その趣旨の包含する範囲で応用変更が可能である。例えば、複数の電磁鋼板6を積層して構成されるステータコア5、およびこれを装着するステータコア固定歩材3、ローター8等の配置構成、形状等は、個々のアウターローター型回転電機1の仕様等に応じて適宜に設定され、本実施の形態に限定されるものではない。   Needless to say, the present invention is not limited to the rotating electrical machine 1 shown in the present embodiment, and application changes can be made within the scope of the gist. For example, the arrangement structure, shape, and the like of the stator core 5 configured by laminating a plurality of electromagnetic steel plates 6, the stator core fixing pedestal 3 on which the magnetic core 6 is mounted, the rotor 8, and the like are the specifications of the individual outer rotor type rotating electrical machines 1 and the like. The setting is appropriately made according to the above, and the present invention is not limited to this embodiment.

1 アウターローター型回転電機
3 ステータコア固定部材(固定部材)
3a 取付部
5 ステータコア(固定子)
5a 取付穴
6 電磁鋼板
8 ローター(回転子)
10 回転軸
11 空隙
17 隙間
19 接着剤
27 マグネット
1 Outer rotor type rotating electrical machine 3 Stator core fixing member (fixing member)
3a Mounting part 5 Stator core (stator)
5a Mounting hole 6 Electrical steel plate 8 Rotor (rotor)
10 Rotating shaft 11 Gap 17 Gap 19 Adhesive 27 Magnet

Claims (5)

電磁鋼板を積層して構成されたステータコアと、前記ステータコアを取り付ける固定部材と、前記ステータコアと所定の空隙をもってその外側に同心的に配置されたローターと、を備えたアウターローター型回転電機において、前記ステータコアを前記固定部材に取り付けた状態において、前記ステータコアを構成する電磁鋼板に引張力を付与することを特徴とするアウターローター型回転電機。 In an outer rotor type rotating electrical machine comprising: a stator core configured by laminating electromagnetic steel sheets; a fixing member to which the stator core is attached; and a rotor that is concentrically disposed outside the stator core with a predetermined gap. An outer rotor type rotating electrical machine, wherein a tensile force is applied to the electrical steel sheet constituting the stator core in a state where the stator core is attached to the fixing member. 前記固定部材は前記ステータコアに挿通される取付部を有し、前記ステータコアは前記取付部を挿通する取付穴を有し、前記ステータコアの取付穴に前記固定部材の取付部を挿通して前記ステータコアを前記固定部材に取り付けるものであって、前記ステータコアの取付穴の内周部と前記固定部材の取付部の外周部の間に隙間を設け、前記隙間に接着剤を塗布して前記ステータコアを前記固定部材に接着して固定することを特徴とする請求項1に記載のアウターローター型回転電機。   The fixing member has an attachment portion inserted through the stator core, the stator core has an attachment hole through which the attachment portion is inserted, and the stator core is inserted into the attachment hole of the stator core by inserting the attachment portion of the fixing member. The stator is attached to the fixing member, and a gap is provided between an inner peripheral portion of the stator core mounting hole and an outer peripheral portion of the fixing member mounting portion, and an adhesive is applied to the gap to fix the stator core. The outer rotor type rotating electrical machine according to claim 1, wherein the outer rotor type rotating electrical machine is fixed by being bonded to a member. 前記ステータコアを前記固定部材に取り付けるとき、前記ステータコアの取付穴の内周部と前記固定部材の取付部の外周部の対向位置における前記ステータコアの取付穴の内径寸法と前記固定部材の取付部の外径寸法との差を0.1mm以上とすることを特徴とする請求項2に記載のアウターローター型回転電機。   When the stator core is attached to the fixing member, the inner diameter of the stator core mounting hole and the outside of the fixing member mounting portion at positions opposed to the inner peripheral portion of the stator core mounting hole and the outer peripheral portion of the fixing member mounting portion. The outer rotor type rotating electrical machine according to claim 2, wherein the difference from the diameter is 0.1 mm or more. 前記固定部材の材質に前記ステータコアより熱膨張率の小さい材料を使用することを特徴とする請求項2または請求項3に記載のアウターローター型回転電機。   4. The outer rotor type rotating electrical machine according to claim 2, wherein a material having a smaller coefficient of thermal expansion than the stator core is used as a material of the fixing member. 前記固定部材に前記ステータコアを取り付けるとき、前記固定部材より前記ステータコアの温度が低くなるように温度差を保持した状態で、前記固定部材に前記ステータコアを接着して固定することを特徴とする請求項2ないし請求項4の何れかに記載のアウターローター型回転電機の製造方法。   The stator core is bonded and fixed to the fixing member when the stator core is attached to the fixing member, with a temperature difference maintained so that the temperature of the stator core is lower than the fixing member. The manufacturing method of the outer rotor type rotary electric machine in any one of Claim 2 thru | or 4.
JP2011203512A 2011-09-16 2011-09-16 Outer rotor rotary electric machine and method for manufacturing the same Withdrawn JP2013066305A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014170939A1 (en) * 2013-04-15 2014-10-23 三菱電機株式会社 Rotor for rotary machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014170939A1 (en) * 2013-04-15 2014-10-23 三菱電機株式会社 Rotor for rotary machine
CN105122600A (en) * 2013-04-15 2015-12-02 三菱电机株式会社 Rotor for rotary machine
JP5932141B2 (en) * 2013-04-15 2016-06-08 三菱電機株式会社 Rotating machine rotor
JPWO2014170939A1 (en) * 2013-04-15 2017-02-16 三菱電機株式会社 Rotating machine rotor
CN105122600B (en) * 2013-04-15 2018-03-02 三菱电机株式会社 The rotor of rotating machinery
US10396611B2 (en) 2013-04-15 2019-08-27 Mitsubishi Electric Corporation Rotor of rotary machine

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