JP2018113742A - Rotor for axial gap type rotary electric machine - Google Patents

Rotor for axial gap type rotary electric machine Download PDF

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JP2018113742A
JP2018113742A JP2017001547A JP2017001547A JP2018113742A JP 2018113742 A JP2018113742 A JP 2018113742A JP 2017001547 A JP2017001547 A JP 2017001547A JP 2017001547 A JP2017001547 A JP 2017001547A JP 2018113742 A JP2018113742 A JP 2018113742A
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rotor
axial gap
gap type
yoke
rotor core
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見多 出口
Kenta Deguchi
見多 出口
榎本　裕治
Yuji Enomoto
裕治 榎本
谷江　尚史
Hisafumi Tanie
尚史 谷江
利文 鈴木
Toshifumi Suzuki
利文 鈴木
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Hitachi Industrial Equipment Systems Co Ltd
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Hitachi Industrial Equipment Systems Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a rotor having a rotor core the assemblability of which can be improved and having a yoke recess with the stress generated at its corner portion being relaxed.SOLUTION: In a rotor for an axial gap type rotary electric machine, including a magnet, a rotor core, and a yoke for holding the magnet and the rotor core, chamfering processing is provided to a corner portion of a rotor core storage portion provided to the yoke of the rotor, and chamfering processing is also provided to a yoke-side corner portion of the rotor core stored in the rotor core storage portion.SELECTED DRAWING: Figure 2

Description

本発明は、アキシャルギャップ型回転電機に関し、とくに回転電機の回転子の構造に関する。   The present invention relates to an axial gap type rotating electrical machine, and more particularly to a structure of a rotor of the rotating electrical machine.

アキシャルギャップ型回転電機は、固定子と、この固定子と所定の空隙（ギャップ）を介して回転軸方向に配置される回転子で構成される。回転子は、周方向に配置された複数の永久磁石と、前記磁石のギャップと反対側の面に配置されるロータコア、および前記磁石と前記コアとを保持するためのヨークとで構成される。   An axial gap type rotating electrical machine includes a stator and a rotor that is arranged in the direction of the rotation axis via the stator and a predetermined gap (gap). The rotor includes a plurality of permanent magnets arranged in the circumferential direction, a rotor core arranged on a surface opposite to the magnet gap, and a yoke for holding the magnet and the core.

アキシャルギャップ型回転電機は、固定子と回転子との対向面積を広くすることで出力を増加させている。   In the axial gap type rotating electrical machine, the output is increased by increasing the facing area between the stator and the rotor.

２枚の円盤状回転子の間に固定子がある、２ロータ-１ステータ型アキシャルギャップ型回転電機のロータの場合、磁気回路を形成するために磁石の反ギャップ側に磁性体のロータコアを有する。これらの磁石およびロータコアは、例えば、特許文献１ないしは２に記載のように、ヨークによって保持されて出力軸に締結されている。   In the case of a rotor of a 2-rotor-1 stator type axial gap type rotating electrical machine having a stator between two disk-like rotors, a magnetic rotor core is provided on the opposite side of the magnet to form a magnetic circuit. . These magnets and the rotor core are held by a yoke and fastened to an output shaft as described in Patent Documents 1 and 2, for example.

特開2008-131845号公報JP 2008-131845 A 特開2015-208176号公報JP-A-2015-208176

しかしながら、 特許文献１や２に記載のヨーク構造では、ヨークに設けられたロータコア格納部分とロータコアとの製造誤差によって組立不良を招くことが課題となる。また、磁石やロータコアの遠心力をヨークのロータコア格納部分の外径側で受けるため、ヨークのロータコア格納部分の隅角部分に大きな応力が発生して破損する恐れがあることが課題となる。   However, the yoke structures described in Patent Documents 1 and 2 have a problem in that defective assembly is caused by a manufacturing error between the rotor core storage portion provided in the yoke and the rotor core. Further, since the centrifugal force of the magnet and the rotor core is received on the outer diameter side of the rotor core storage portion of the yoke, there is a problem that a large stress may be generated in the corner portion of the rotor core storage portion of the yoke and may be damaged.

本発明は、上記の課題を解決するため、ロータコアの組立性を向上させるとともにヨークのロータコア隅角部分に発生する応力を緩和することが可能なアキシャルギャップ型回転電機の回転子構造を提供することを目的とする。   In order to solve the above-described problems, the present invention provides a rotor structure for an axial gap type rotating electrical machine that can improve the assembling property of the rotor core and can relieve the stress generated in the corner portion of the rotor core of the yoke. With the goal.

上記の目的を達成するために、本発明では、磁石と回転子コアおよび前記磁石と回転子コアとを保持するためのヨークを有するアキシャルギャップ型回転電機の回転子において、前記回転子のヨークに設けられた回転子コア格納部の隅角部に面取加工を設けて、前記回転子コア格納部に格納される回転子コアのヨーク側角部にも面取加工が設けられることを特徴とする。   In order to achieve the above object, according to the present invention, in a rotor of an axial gap type rotating electric machine having a magnet and a rotor core and a yoke for holding the magnet and the rotor core, A chamfering process is provided at a corner portion of the provided rotor core storage portion, and a chamfering process is also provided at a yoke side corner portion of the rotor core stored in the rotor core storage portion. To do.

本発明によれば、ロータコアの組立性を向上させるとともにヨーク凹部の隅角部分に発生する応力を緩和することが可能となる。   According to the present invention, it is possible to improve the assemblability of the rotor core and relieve the stress generated in the corner portion of the yoke recess.

本発明の実施形態のアキシャルギャップ型回転電機の全体構造を示す斜視図。The perspective view which shows the whole structure of the axial gap type rotary electric machine of embodiment of this invention. 本発明の実施形態のアキシャルギャップ型回転電機の断面図。Sectional drawing of the axial gap type rotary electric machine of embodiment of this invention. 本発明の実施形態のアキシャルギャップ型回転電機の断面図。Sectional drawing of the axial gap type rotary electric machine of embodiment of this invention. 本発明の実施形態のアキシャルギャップ型回転電機の断面図。Sectional drawing of the axial gap type rotary electric machine of embodiment of this invention. 本発明の実施形態のアキシャルギャップ型回転電機の断面図。Sectional drawing of the axial gap type rotary electric machine of embodiment of this invention.

以下、本発明の実施例について説明する。図１に本発明を適用する２ロータ型のアキシャルギャップ型回転電機の基本構成を説明するための斜視図を示す。同図に示すように、アキシャルギャップ型回転電機１は、回転軸５０方向に一対の円盤状の回転子１０を対向するように配置し、一対の回転子１０の間に所定のギャップを介して固定子２０を挟み込んだ構造を有している。   Examples of the present invention will be described below. FIG. 1 is a perspective view for explaining the basic configuration of a two-rotor type axial gap rotating electrical machine to which the present invention is applied. As shown in the figure, the axial gap type rotating electrical machine 1 is arranged so that a pair of disk-shaped rotors 10 face each other in the direction of the rotation axis 50, and a predetermined gap is interposed between the pair of rotors 10. The stator 20 is sandwiched.

＜固定子＞
固定子２０は、周方向に配置される複数のコア２１と、それぞれのコア２１の周囲に巻回されるコイル２２から構成される。図示は省略しているが、これらのコア２１およびコイル２２は樹脂によるモールドや機械部品によってモータケースへと保持されている。コア２１は、渦電流の発生を抑制するために、例えば電磁鋼板やアモルファス箔帯などの磁性薄板の積層体で構成されている。 <Stator>
The stator 20 includes a plurality of cores 21 arranged in the circumferential direction and coils 22 wound around each core 21. Although not shown, the core 21 and the coil 22 are held in the motor case by resin molding or mechanical parts. In order to suppress the generation of eddy current, the core 21 is composed of a laminate of magnetic thin plates such as electromagnetic steel plates and amorphous foil strips.

＜回転子＞
回転子１０は、軸方向に凹部を有するヨーク１２と、各凹部に配置されるロータコア１３を有する。ロータコア１３は、例えば接着によってヨーク１２の凹部に設置されている。ロータコア１３の固定子２０（ステータ）対向側には磁石１１が配置されている。磁石１１は、一体のリング磁石ないしは周方向または径方向に複数分割された分割磁石である。 <Rotor>
The rotor 10 includes a yoke 12 having a recess in the axial direction and a rotor core 13 disposed in each recess. The rotor core 13 is installed in the concave portion of the yoke 12 by adhesion, for example. A magnet 11 is disposed on the side of the rotor core 13 facing the stator 20 (stator). The magnet 11 is an integral ring magnet or a divided magnet divided into a plurality of pieces in the circumferential direction or the radial direction.

なお、本発明は上述した２ロータ型のアキシャルギャップ型回転電機に限定されるものではなく、例えば、１つの固定子と回転子とが所定のギャップを配置して配置される１ロータ-１ステータ型のアキシャルギャップ型回転電機にも適用可能であることは言うまでもない。   The present invention is not limited to the above-described two-rotor axial gap type rotating electrical machine. For example, one rotor and one stator in which one stator and the rotor are arranged with a predetermined gap. Needless to say, the present invention is also applicable to a type of axial gap type rotating electrical machine.

以下、本発明に関する回転子構造の実施例を説明する。   Examples of the rotor structure relating to the present invention will be described below.

（実施例１）
図２に実施形態１のアキシャルギャップ型回転電機の回転子構造を示す。同図に示すように、実施形態１の回転子構造によれば、ヨーク１２に設けられた凹部（ロータコア１３および磁石１１を格納する部分）の隅角部にＲ面取加工１２ｒを設け、かつ、ロータコア１３のヨーク側の角部にＲ面取加工１３ｒを設ける。 Example 1
FIG. 2 shows a rotor structure of the axial gap type rotating electric machine according to the first embodiment. As shown in the figure, according to the rotor structure of the first embodiment, R chamfering 12r is provided at the corners of the recess provided in the yoke 12 (portion for storing the rotor core 13 and the magnet 11), and Then, an R chamfering process 13r is provided at the corner of the rotor core 13 on the yoke side.

以上に示した第１実施例のアキシャルギャップ型回転電機の回転子構造によれば、ヨーク１２の凹部の隅角部に設けたＲ面取加工１２ｒにより、ヨーク１２のツバ部１２ａに磁石の遠心力が作用した場合にヨーク１２の凹部の隅角部に応力集中することを抑制可能となる。また、ヨーク１２のＲ面取寸法Ｒyokeよりも、ロータコア１３の角部のＲ面取寸法Ｒcoreを大きくすることで、ロータコア１３をヨーク１２の凹部へと組み立てる際の作業性を向上させることが可能となる。 According to the rotor structure of the axial gap type rotating electrical machine of the first embodiment described above, the magnet centrifuge is applied to the flange portion 12a of the yoke 12 by the R chamfering process 12r provided at the corner portion of the concave portion of the yoke 12. It is possible to suppress stress concentration at the corners of the concave portion of the yoke 12 when force is applied. Further, the workability when assembling the rotor core 13 into the concave portion of the yoke 12 is improved by increasing the R chamfer dimension R core at the corner of the rotor core 13 than the R chamfer dimension R yoke of the yoke 12. Is possible.

（実施例２）
図３に実施形態２のアキシャルギャップ型回転電機の回転子構造を示す。同図に示すように、実施形態２の回転子構造によれば、実施形態１の構成に加えて、ロータコア１３のヨーク側の角部に施す面取加工をＣ面取り加工とする。 (Example 2)
FIG. 3 shows a rotor structure of the axial gap type rotating electric machine according to the second embodiment. As shown in the figure, according to the rotor structure of the second embodiment, in addition to the configuration of the first embodiment, the chamfering performed on the corner of the rotor core 13 on the yoke side is the C chamfering.

以上に示した構造によれば、ロータコア１３で発生する損失を抑制するために、ロータコア１３を磁性薄板のロール状の積層体で構成して剛性が弱くなった場合であっても、Ｃ面取り加工とすることで製造性を向上させることが可能となる。また、実施例１と同様に、ヨーク１２のＲ面取寸法Ｒyokeよりも、ロータコア１３の角部のＣ面取寸法Ｃcoreを大きくすることで、ロータコア１３をヨーク１２の凹部へと組み立てる際の作業性を向上させることが可能となる。 According to the structure shown above, in order to suppress the loss generated in the rotor core 13, even when the rotor core 13 is constituted by a roll-shaped laminated body of magnetic thin plates and the rigidity becomes weak, the C chamfering process is performed. It becomes possible to improve manufacturability. As in the first embodiment, when the rotor core 13 is assembled into the recess of the yoke 12 by making the C chamfer dimension C core at the corner of the rotor core 13 larger than the R chamfer dimension R yoke of the yoke 12. It is possible to improve the workability.

（実施例３）
図４は実施形態３のアキシャルギャップ型回転電機の回転子構造を示す。同図に示すように、実施形態３の回転子構造によれば、ヨーク１２の隅角部にＲ加工によって逃げ部を設けている。 (Example 3)
FIG. 4 shows a rotor structure of an axial gap type rotating electric machine according to the third embodiment. As shown in the figure, according to the rotor structure of the third embodiment, a relief portion is provided at the corner portion of the yoke 12 by R machining.

本実施例に示した構造によれば、ロータコア１３のヨーク側角部に面取加工を施すことなく、ヨーク１２の凹部の隅角部とロータコア１３のヨーク側角部との干渉を防ぐことが可能となり、加工工数の削減が可能となる。   According to the structure shown in the present embodiment, it is possible to prevent interference between the corner of the concave portion of the yoke 12 and the yoke side corner of the rotor core 13 without chamfering the yoke side corner of the rotor core 13. This makes it possible to reduce processing man-hours.

また、図５に示すようなヨーク１２と磁石１１のみで構成されるロータ構造であっても、磁石１１の角部には追加の加工が不要であるため、本実施例の構造を適用することが可能となる。   Further, even if the rotor structure includes only the yoke 12 and the magnet 11 as shown in FIG. 5, no additional processing is required at the corner of the magnet 11, so the structure of this embodiment is applied. Is possible.

なお、前述した図２から図５の構造について、ヨーク１２の凹部の隅角部に設けるＲ面取加工および、ロータコア１３のヨーク側角部に設けるＲ面取加工（もしくはＣ面取加工）は、内径側と外径側の両方に設けることが可能であり、前述した効果と同様の効果が得られることは言うまでもない。   2 to 5, the R chamfering provided at the corner of the concave portion of the yoke 12 and the R chamfering (or C chamfering) provided at the yoke side corner of the rotor core 13 are performed. Needless to say, it can be provided on both the inner diameter side and the outer diameter side, and the same effect as described above can be obtained.

１：アキシャルギャップ型回転電機
１０：回転子
１１：磁石
１２：ヨーク
１２ａ：ツバ部
１２ｒ：Ｒ面取加工部
１３：ロータコア
１３ｒ：Ｒ面取加工部
１３ｃ：Ｃ面取加工部
２０：固定子
２１：コイル
２２：コア
５０：回転軸 1: axial gap type rotating electrical machine 10: rotor 11: magnet 12: yoke 12a: flange portion 12r: R chamfering portion 13: rotor core 13r: R chamfering portion 13c: C chamfering portion 20: stator 21 : Coil 22: Core 50: Rotating shaft

Claims (8)

磁石と回転子コアおよび前記磁石と回転子コアとを保持するためのヨークを有するアキシャルギャップ型回転電機の回転子において、
前記回転子のヨークに設けられた回転子コア格納部の隅角部に面取加工を設けて、
前記回転子コア格納部に格納される回転子コアのヨーク側角部にも面取加工が設けられることを特徴とするアキシャルギャップ型回転電機の回転子。 In a rotor of an axial gap type rotating electrical machine having a magnet and a rotor core and a yoke for holding the magnet and the rotor core,
Chamfering is provided at the corner of the rotor core storage provided in the rotor yoke,
A rotor for an axial gap type rotating electrical machine, wherein chamfering is also provided at a corner on the yoke side of the rotor core stored in the rotor core storage unit. 請求項１に記載されたアキシャルギャップ型回転電機の回転子であって、 前記面取加工が前記回転子コア格納部および前記回転子コアの内径側と外径側の両隅角部に設けられていることを特徴とするアキシャルギャップ型回転電機の回転子。   It is a rotor of the axial gap type rotary electric machine described in Claim 1, Comprising: The said chamfering process is provided in the both corners of the inner diameter side and outer diameter side of the said rotor core storage part and the said rotor core. A rotor for an axial gap type rotating electrical machine. 請求項１ないしは２に記載されたアキシャルギャップ型回転電機の回転子であって、前記回転子コア格納部および前記回転子コアに施される面取加工がＲ面取加工であることを特徴とするアキシャルギャップ型回転電機の回転子。   It is a rotor of the axial gap type rotary electric machine described in Claim 1 thru | or 2, Comprising: The chamfering process given to the said rotor core storage part and the said rotor core is a R chamfering process, It is characterized by the above-mentioned. Axial gap type rotating electrical machine rotor. 請求項１ないしは２に記載されたアキシャルギャップ型回転電機の回転子であって、 前記回転子コア格納部に施される面取加工がＲ面取加工であって、前記回転子コアに施される面取加工はＣ面取加工であることを特徴とするアキシャルギャップ型回転電機の回転子。   It is a rotor of the axial gap type rotary electric machine described in Claim 1 thru | or 2, Comprising: The chamfering process given to the said rotor core storage part is a R chamfering process, Comprising: It is given to the said rotor core. The rotor of an axial gap type rotating electrical machine, wherein the chamfering is C chamfering. 請求項１から３に記載されたアキシャルギャップ型回転電機の回転子であって、前記回転子コア格納部に施されるＲ面取加工のＲyokeと、前記回転子コアに施されるＲ面取加工のＲcoreの寸法関係は、ＲcoreがＲyoke以上であることを特徴とするアキシャルギャップ型回転電機の回転子。 4. The rotor of the axial gap type rotating electrical machine according to claim 1, wherein an R chamfering R yoke applied to the rotor core housing portion and an R surface applied to the rotor core. 5. A rotor of an axial gap type rotating electrical machine characterized in that R core is dimensionally larger than R yoke in machining R core . 請求項４に記載されたアキシャルギャップ型回転電機の回転子であって、前記回転子コア格納部に施されるＲ面取加工のＲyokeと、前記回転子コアに施されるＣ面取加工のＣcoreの寸法関係は、ＣcoreがＲyoke以上であることを特徴とするアキシャルギャップ型回転電機の回転子。 5. A rotor of an axial gap type rotating electrical machine according to claim 4, wherein an R yoke for R chamfering applied to the rotor core storage portion and a C chamfering applied to the rotor core. the dimensional relationship of the C core, the rotor of the axial gap type rotary electric machine, wherein the C core is not less than R yoke. 磁石および前記磁石を保持するためのヨークを有するアキシャルギャップ型回転電機の回転子において、前記回転子のヨークに設けられたヨークに設けられた磁石格納部の角部に逃げ部が設けられていることを特徴とするアキシャルギャップ型回転電機の回転子。   In a rotor of an axial gap type rotating electrical machine having a magnet and a yoke for holding the magnet, relief portions are provided at corners of a magnet storage portion provided in the yoke provided in the yoke of the rotor. A rotor of an axial gap type rotating electrical machine. 請求項１または７に記載されたアキシャルギャップ型回転電機の回転子を備えるアキシャルギャップ型回転電機。 An axial gap type rotating electrical machine comprising the rotor of the axial gap type rotating electrical machine according to claim 1.
JP2017001547A 2017-01-10 2017-01-10 Rotor for axial gap type rotary electric machine Pending JP2018113742A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01116217U (en) * 1988-02-02 1989-08-04
JP2002199647A (en) * 2000-12-26 2002-07-12 Denso Corp Yoke of motor
WO2015162819A1 (en) * 2014-04-25 2015-10-29 株式会社日立産機システム Axial air-gap rotary electric machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01116217U (en) * 1988-02-02 1989-08-04
JP2002199647A (en) * 2000-12-26 2002-07-12 Denso Corp Yoke of motor
WO2015162819A1 (en) * 2014-04-25 2015-10-29 株式会社日立産機システム Axial air-gap rotary electric machine

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